Perovskite (structure)

This article is about the synthetic compounds. For the mineral, see Perovskite.
Structure of a perovskite with general chemical formula ABX3. The red spheres are X atoms (usually oxygens), the blue spheres are B atoms (a smaller metal cation, such as Ti4+), and the green spheres are the A atoms (a larger metal cation, such as Ca2+). Pictured is the undistorted cubic structure; the symmetry is lowered to orthorhombic, tetragonal or trigonal in many perovskites.[1]
calcium titanate
structure of oxide ABO3
MAPbBr3 crystal

A perovskite is any material with a crystal structure following the formula ABX3, which was first discovered as the mineral called perovskite, which consists of calcium titanium oxide (CaTiO3).[2] The mineral was first discovered in the Ural mountains of Russia by Gustav Rose in 1839 and named after Russian mineralogist L. A. Perovski (1792–1856). 'A' and 'B' are two positively charged ions (i.e. cations), often of very different sizes, and X is a negatively charged ion (an anion, frequently oxide) that bonds to both cations. The 'A' atoms are generally larger than the 'B' atoms. The ideal cubic structure has the B cation in 6-fold coordination, surrounded by an octahedron of anions, and the A cation in 12-fold cuboctahedral coordination. Additional perovskite forms may exist where either/both the A and B sites have a configuration of A1x-1A2x and/or B1y-1B2y and the X may deviate from the ideal coordination configuration as ions within the A and B sites undergo changes in their oxidation states.[3]

As one of the most abundant structural families, perovskites are found in an enormous number of compounds which have wide-ranging properties, applications and importance.[4] Natural compounds with this structure are perovskite, loparite, and the silicate perovskite bridgmanite.[2][5] Since the 2009 discovery of perovskite solar cells, which contain methylammonium lead halide perovskites, there has been considerable research interest into perovskite materials.[6]

Structure

Perovskite structures are adopted by many oxides that have the chemical formula ABO3. The idealized form is a cubic structure (space group Pm3m, no. 221) which is rarely encountered. The orthorhombic (e.g. space group Pnma, no. 62, or Amm2, no. 68) and tetragonal (e.g. space group I4/mcm, no. 140, or P4mm, no. 99) phases are the most common non-cubic variants. Although the perovskite structure is named after CaTiO3, this mineral forms a non-idealized form. SrTiO3 and CaRbF3 are examples of cubic perovskites. Barium titanate is an example of a perovskite which can take on the rhombohedral (space group R3m, no. 160), orthorhombic, tetragonal and cubic forms depending on temperature.[7]

In the idealized cubic unit cell of such a compound, the type 'A' atom sits at cube corner position (0, 0, 0), the type 'B' atom sits at the body-center position (1/2, 1/2, 1/2) and oxygen atoms sit at face centered positions (1/2, 1/2, 0), (1/2, 0, 1/2) and (0, 1/2, 1/2). The diagram to the right shows edges for an equivalent unit cell with A in the cube corner position, B at the body center, and O at face-centered positions.

Four general categories of cation-pairing are possible: A+B2+X−3, or 1:2 perovskites;[8] A2+B4+X2−3, or 2:4 perovskites; A3+B3+X2−3, or 3:3 perovskites; and A+B5+X2−3, or 1:5 perovskites.

The relative ion size requirements for stability of the cubic structure are quite stringent, so slight buckling and distortion can produce several lower-symmetry distorted versions, in which the coordination numbers of A cations, B cations or both are reduced. Tilting of the BO6 octahedra reduces the coordination of an undersized A cation from 12 to as low as 8. Conversely, off-centering of an undersized B cation within its octahedron allows it to attain a stable bonding pattern. The resulting electric dipole is responsible for the property of ferroelectricity and shown by perovskites such as BaTiO3 that distort in this fashion.

Complex perovskite structures contain two different B-site cations. This results in the possibility of ordered and disordered variants.

Layered perovskites

Perovskites may be structured in layers, with the ABO
3 structure separated by thin sheets of intrusive material. Different forms of intrusions, based on the chemical makeup of the intrusion, are defined as:[9]

  • Aurivillius phase: the intruding layer is composed of a [Bi
    2    O
    2    ]2+ ion, occurring every n ABO
    3     layers, leading to an overall chemical formula of [Bi
    2    O
    2    ]-A
    (n−1)    B
    2    O
    7    . Their oxide ion-conducting properties were first discovered in the 1970s by Takahashi et al., and they have been used for this purpose ever since.[10]
  • Dion−Jacobson phase: the intruding layer is composed of an alkali metal (M) every n ABO
    3     layers, giving the overall formula as M+
    A
    (n−1)    B
    n    O
    (3n+1)
  • Ruddlesden-Popper phase: the simplest of the phases, the intruding layer occurs between every one (n = 1) or multiple (n > 1) layers of the ABO
    3     lattice. Ruddlesden−Popper phases have a similar relationship to perovskites in terms of atomic radii of elements with A typically being large (such as La[11] or Sr[12]) with the B ion being much smaller typically a transition metal (such as Mn,[11] Co[13] or Ni[14]). Recently, hybrid organic-inorganic layered perovskites have been developed,[15] where the structure is constituted of one or more layers of MX64--octahedra, where M is a +2 metal (such as Pb2+ or Sn2+) and X and halide ion (such as F−, Cl−, Br−, I−), separated by layers of organic cations (such as butylammonium- or phenylethylammonium-cation).[16][17]

Thin films

Atomic resolution scanning transmission electron microscopy imaging of a perovskite oxide thin film system. Showing a cross section of a La0.7Sr0.3MnO3 and LaFeO3 bilayer grown on 111-SrTiO3. Overlay: A-cation (green), B-cation (grey) and oxygen (red).

Perovskites can be deposited as epitaxial thin films on top of other perovskites,[18] using techniques such as pulsed laser deposition and molecular-beam epitaxy. These films can be a couple of nanometres thick or as small as a single unit cell.[19] The well-defined and unique structures at the interfaces between the film and substrate can be used for interface engineering, where new types properties can arise.[20] This can happen through several mechanisms, from mismatch strain between the substrate and film, change in the oxygen octahedral rotation, compositional changes, and quantum confinement.[21] An example of this is LaAlO3 grown on SrTiO3, where the interface can exhibit conductivity, even though both LaAlO3 and SrTiO3 are non-conductive.[22] Another example is SrTiO3 grown on LSAT ((LaAlO3)0.3 (Sr2AlTaO6)0.7) or DyScO3 can morph the incipient ferroelectric into a ferroelectric at room temperature through the means of epitaxially applied biaxial strain.[23] The lattice mismatch of GdScO3 to SrTiO3 (+1.0%) applies tensile stress resulting in a decrease of the out-of-plane lattice constant of SrTiO3, compared to LSAT (–0.9 %), which epitaxially applies compressive stress leading to an extension of the out-of-plane lattice constant of SrTiO3 (and subsequent increase of the in-plane lattice constant).[23]

Octahedral tilting

Beyond the most common perovskite symmetries (cubic, tetragonal, orthorhombic), a more precise determination leads to a total of 23 different structure types that can be found.[24] These 23 structure can be categorized into 4 different so-called tilt systems that are denoted by their respective Glazer notation.[25]

Tilt System

number

Tilt system symbol Space group
Three-tilt systems
1 a+b+c+ Immm (#71)
2 a+b+b+ Immm (#71)
3 a+a+a+ Im3 (#204)
4 a+b+c- Pmmn (#59)
5 a+a+c- Pmmn (#59)
6 a+b+b- Pmmn (#59)
7 a+a+a- Pmmn (#59)
8 a+b-c- A21/m11 (#11)
9 a+a-c- A21/m11 (#11)
10 a+b-b- Pmnb (#62)
11 a+a-a- Pmnb (#62)
12 a-b-c- F1 (#2)
13 a-b-b- I2/a (#15)
14 a-a-a- R3c (#167)
Two-tilt systems
15 a0b+c+ Immm (#71)
16 a0b+b+ I4/mmm (#139)
17 a0b+c- Bmmb (#63)
18 a0b+b- Bmmb (#63)
19 a0b-c- F2/m11 (#12)
29 a0b-b- Imcm (#74)
One-tilt systems
21 a0a0c+ C4/mmb (#127)
22 a0a0c- F4/mmc (#140)
Zero-tilt systems
23 a0a0a0 Pm3m (#221)
One-tilt and zero-tilt systems in perovskites

The notation consists of a letter a/b/c, which describes the rotation around a Cartesian axis and a superscript +/—/0 to denote the rotation with respect to the adjacent layer. A “+” denotes that the rotation of two adjacent layers points in the same direction, whereas a “—” denotes that adjacent layers are rotated in opposite directions. Common examples are a0a0a0, a0a0a– and a0a0a+ which are visualized here.

Examples

Minerals

The perovskite structure is adopted at high pressure by bridgmanite, a silicate with the chemical formula (Mg,Fe)SiO3, which is the most common mineral in the Earth's mantle. As pressure increases, the SiO44− tetrahedral units in the dominant silica-bearing minerals become unstable compared with SiO68− octahedral units. At the pressure and temperature conditions of the lower mantle, the second most abundant material is likely the rocksalt-structured (Mg,Fe)O oxide, periclase.[2]

At the high pressure conditions of the Earth's lower mantle, the pyroxene enstatite, MgSiO3, transforms into a denser perovskite-structured polymorph; this phase may be the most common mineral in the Earth.[26] This phase has the orthorhombically distorted perovskite structure (GdFeO3-type structure) that is stable at pressures from ~24 GPa to ~110 GPa. However, it cannot be transported from depths of several hundred km to the Earth's surface without transforming back into less dense materials. At higher pressures, MgSiO3 perovskite, commonly known as silicate perovskite, transforms to post-perovskite.

Complex perovskites

Although there is a large number of simple known ABX3 perovskites, this number can be greatly expanded if the A and B sites are increasingly doubled / complex AA’BB’X6.[27] Ordered double perovskites are usually denoted as A2BB’O6 where disordered are denoted as A(BB’)O3. In ordered perovskites, three different types of ordering are possible: rock-salt, layered, and columnar. The most common ordering is rock-salt followed by the much more uncommon disordered and very distant columnar and layered.[27] The formation of rock-salt superstructures is dependent on the B-site cation ordering.[28][29] Octahedral tilting can occur in double perovskites, however Jahn–Teller distortions and alternative modes alter the B–O bond length.

Others

Although the most common perovskite compounds contain oxygen, there are a few perovskite compounds that form without oxygen. Fluoride perovskites such as NaMgF3 are well known. A large family of metallic perovskite compounds can be represented by RT3M (R: rare-earth or other relatively large ion, T: transition metal ion and M: light metalloids). The metalloids occupy the octahedrally coordinated "B" sites in these compounds. RPd3B, RRh3B and CeRu3C are examples. MgCNi3 is a metallic perovskite compound and has received lot of attention because of its superconducting properties. An even more exotic type of perovskite is represented by the mixed oxide-aurides of Cs and Rb, such as Cs3AuO, which contain large alkali cations in the traditional "anion" sites, bonded to O2− and Au− anions.[citation needed]

Materials properties

Perovskite materials exhibit many interesting and intriguing properties from both the theoretical and the application point of view. Colossal magnetoresistance, ferroelectricity, superconductivity, charge ordering, spin dependent transport, high thermopower and the interplay of structural, magnetic and transport properties are commonly observed features in this family. These compounds are used as sensors and catalyst electrodes in certain types of fuel cells[30] and are candidates for memory devices and spintronics applications.[31]

Many superconducting ceramic materials (the high temperature superconductors) have perovskite-like structures, often with 3 or more metals including copper, and some oxygen positions left vacant. One prime example is yttrium barium copper oxide which can be insulating or superconducting depending on the oxygen content.

Chemical engineers are considering a cobalt-based perovskite material as a replacement for platinum in catalytic converters for diesel vehicles.[32]

Aspirational applications

Physical properties of interest to materials science among perovskites include superconductivity, magnetoresistance, ionic conductivity, and a multitude of dielectric properties, which are of great importance in microelectronics and telecommunication. They are also some interests for scintillator as they have large light yield for radiation conversion. Because of the flexibility of bond angles inherent in the perovskite structure there are many different types of distortions which can occur from the ideal structure. These include tilting of the octahedra, displacements of the cations out of the centers of their coordination polyhedra, and distortions of the octahedra driven by electronic factors (Jahn-Teller distortions).[33] The financially biggest application of perovskites is in ceramic capacitors, in which BaTiO3 is used because of its high dielectric constant.[34][35]

Photovoltaics

Main article: Perovskite solar cell
Crystal structure of CH3NH3PbX3 perovskites (X=I, Br and/or Cl). The methylammonium cation (CH3NH3+) is surrounded by PbX6 octahedra.[36]

Synthetic perovskites are possible materials for high-efficiency photovoltaics[37][38] – they showed a conversion efficiency of up to 26.3%[38][39][40] and can be manufactured using the same thin-film manufacturing techniques as that used for thin film silicon solar cells.[41] Methylammonium tin halides and methylammonium lead halides are of interest for use in dye-sensitized solar cells.[42][43] Some perovskite PV cells reach a theoretical peak efficiency of 31%.[44]

Among the methylammonium halides studied so far the most common is the methylammonium lead triiodide (CH
3NH
3PbI
3). It has a high charge carrier mobility and charge carrier lifetime that allow light-generated electrons and holes to move far enough to be extracted as current, instead of losing their energy as heat within the cell. CH
3NH
3PbI
3 effective diffusion lengths are some 100 nm for both electrons and holes.[45]

Methylammonium halides are deposited by low-temperature solution methods (typically spin-coating). Other low-temperature (below 100 °C) solution-processed films tend to have considerably smaller diffusion lengths. Stranks et al. described nanostructured cells using a mixed methylammonium lead halide (CH3NH3PbI3−xClx) and demonstrated one amorphous thin-film solar cell with an 11.4% conversion efficiency, and another that reached 15.4% using vacuum evaporation. The film thickness of about 500 to 600 nm implies that the electron and hole diffusion lengths were at least of this order. They measured values of the diffusion length exceeding 1 μm for the mixed perovskite, an order of magnitude greater than the 100 nm for the pure iodide. They also showed that carrier lifetimes in the mixed perovskite are longer than in the pure iodide.[45] Liu et al. applied Scanning Photo-current Microscopy to show that the electron diffusion length in mixed halide perovskite along (110) plane is in the order of 10 μm.[46]

For CH
3NH
3PbI
3, open-circuit voltage (VOC) typically approaches 1 V, while for CH
3NH
3PbI(I,Cl)
3 with low Cl content, VOC > 1.1 V has been reported. Because the band gaps (Eg) of both are 1.55 eV, VOC-to-Eg ratios are higher than usually observed for similar third-generation cells. With wider bandgap perovskites, VOC up to 1.3 V has been demonstrated.[45]

The technique offers the potential of low cost because of the low temperature solution methods and the absence of rare elements. Cell durability is currently insufficient for commercial use.[45] However, the solar cells are prone to degradation due to volatility of the organic [CH3NH3]+I- salt. The all-inorganic perovskite cesium lead iodide perovskite (CsPbI3) circumvents this problem, but is itself phase-unstable, the low temperature solution methods of which have only been recently developed.[47]

Planar heterojunction perovskite solar cells can be manufactured in simplified device architectures (without complex nanostructures) using only vapor deposition. This technique produces 15% solar-to-electrical power conversion as measured under simulated full sunlight.[48]

Lasers

LaAlO3 doped with neodymium gave laser emission at 1080 nm.[49] Mixed methylammonium lead halide (CH3NH3PbI3−xClx) cells fashioned into optically pumped vertical-cavity surface-emitting lasers (VCSELs) convert visible pump light to near-IR laser light with a 70% efficiency.[50][51]

Light-emitting diodes

Due to their high photoluminescence quantum efficiencies, perovskites may find use in light-emitting diodes (LEDs).[52] Although the stability of perovskite LEDs is not yet as good as III-V or organic LEDs, there are plenty of ongoing research to solve this problem, such as incorporating organic molecules[53] or potassium dopants[54] in perovskite LEDs.

Photoelectrolysis

Water electrolysis at 12.3% efficiency use perovskite photovoltaics.[55][56]

Scintillators

Cerium-doped lutetium aluminum perovskite (LuAP:Ce) single crystals were reported.[57] The main property of those crystals is a large mass density of 8.4 g/cm3, which gives short X- and gamma-ray absorption length. The scintillation light yield and the decay time with Cs137 radiation source are 11,400 photons/MeV and 17 ns, respectively.[58] Those properties made LUAP:Ce scintillators attractive for commercials and they were used quite often in high energy physics experiments. Until eleven years later, one group in Japan proposed Ruddlesden-Popper solution-based hybrid organic-inorganic perovskite crystals as low-cost scintillators.[59] However, the properties were not so impressive in comparison with LuAP:Ce. Until the next nine years, the solution-based hybrid organic-inorganic perovskite crystals became popular again through a report about their high light yields of more than 100,000 photons/MeV at cryogenic temperatures.[60] Recent demonstration of perovskite nanocrystal scintillators for X-ray imaging screen was reported and it is triggering more research efforts for perovskite scintillators.[61] Layered Ruddlesden-Popper perovskites have shown potential as fast novel scintillators with room temperature light yields up to 40,000 photons/MeV, fast decay times below 5 ns and negligible afterglow.[16][17] In addition this class of materials have shown capability for wide-range particle detection, including alpha particles and thermal neutrons.[62]

Examples of perovskites

Simple:

Solid solutions:

See also

References

  1. ^ A. Navrotsky (1998). "Energetics and Crystal Chemical Systematics among Ilmenite, Lithium Niobate, and Perovskite Structures". Chem. Mater. 10 (10): 2787. doi:10.1021/cm9801901.
  2. ^ a b c Wenk, Hans-Rudolf; Bulakh, Andrei (2004). Minerals: Their Constitution and Origin. New York, NY: Cambridge University Press. ISBN 978-0-521-52958-7.
  3. ^ N. Orlovskaya, N. Browning, ed. (2003). Mixed Ionic Electronic Conducting Perovskites for Advanced Energy Systems.
  4. ^ Artini, Cristina (2017-02-01). "Crystal chemistry, stability and properties of interlanthanide perovskites: A review". Journal of the European Ceramic Society. 37 (2): 427–440. doi:10.1016/j.jeurceramsoc.2016.08.041. ISSN 0955-2219.
  5. ^ Bridgemanite on Mindat.org
  6. ^ Fan, Zhen; Sun, Kuan; Wang, John (2015-09-15). "Perovskites for photovoltaics: a combined review of organic–inorganic halide perovskites and ferroelectric oxide perovskites". Journal of Materials Chemistry A. 3 (37): 18809–18828. doi:10.1039/C5TA04235F. ISSN 2050-7496.
  7. ^ Johnsson, Mats; Lemmens, Peter (2007). "Crystallography and Chemistry of Perovskites". Handbook of Magnetism and Advanced Magnetic Materials. arXiv:cond-mat/0506606. doi:10.1002/9780470022184.hmm411. ISBN 978-0470022177. S2CID 96807089.
  8. ^ Becker, Markus; Klüner, Thorsten; Wark, Michael (2017-03-14). "Formation of hybrid ABX3 perovskite compounds for solar cell application: first-principles calculations of effective ionic radii and determination of tolerance factors". Dalton Transactions. 46 (11): 3500–3509. doi:10.1039/C6DT04796C. ISSN 1477-9234. PMID 28239731.
  9. ^ Cava, Robert J. "Cava Lab: Perovskites". Princeton University. Retrieved 13 November 2013.
  10. ^ Kendall, K. R.; Navas, C.; Thomas, J. K.; Zur Loye, H. C. (1996). "Recent Developments in Oxide Ion Conductors: Aurivillius Phases". Chemistry of Materials. 8 (3): 642–649. doi:10.1021/cm9503083.
  11. ^ a b Munnings, C; Skinner, S; Amow, G; Whitfield, P; Davidson, I (15 October 2006). "Structure, stability and electrical properties of the La(2−x)SrxMnO4±δ solid solution series". Solid State Ionics. 177 (19–25): 1849–1853. doi:10.1016/j.ssi.2006.01.009.
  12. ^ Munnings, Christopher N.; Sayers, Ruth; Stuart, Paul A.; Skinner, Stephen J. (January 2012). "Structural transformation and oxidation of Sr2MnO3.5+x determined by in-situ neutron powder diffraction" (PDF). Solid State Sciences. 14 (1): 48–53. Bibcode:2012SSSci..14...48M. doi:10.1016/j.solidstatesciences.2011.10.015. hdl:10044/1/15437.
  13. ^ Amow, G.; Whitfield, P. S.; Davidson, I. J.; Hammond, R. P.; Munnings, C. N.; Skinner, S. J. (January 2004). "Structural and sintering characteristics of the La2Ni1−xCoxO4+δ series". Ceramics International. 30 (7): 1635–1639. doi:10.1016/j.ceramint.2003.12.164.
  14. ^ Amow, G.; Whitfield, P. S.; Davidson, J.; Hammond, R. P.; Munnings, C.; Skinner, S. (11 February 2011). "Structural and Physical Property Trends of the Hyperstoichiometric Series, La2Ni(1−x)CoxO4+δ". MRS Proceedings. 755. doi:10.1557/PROC-755-DD8.10.
  15. ^ Stoumpos, Constantinos C.; Cao, Duyen H.; Clark, Daniel J.; Young, Joshua; Rondinelli, James M.; Jang, Joon I.; Hupp, Joseph T.; Kanatzidis, Mercouri G. (2016-04-26). "Ruddlesden–Popper Hybrid Lead Iodide Perovskite 2D Homologous Semiconductors". Chemistry of Materials. 28 (8): 2852–2867. doi:10.1021/acs.chemmater.6b00847. ISSN 0897-4756.
  16. ^ a b Xie, Aozhen; Maddalena, Francesco; Witkowski, Marcin E.; Makowski, Michal; Mahler, Benoit; Drozdowski, Winicjusz; Springham, Stuart Victor; Coquet, Philippe; Dujardin, Christophe; Birowosuto, Muhammad Danang; Dang, Cuong (2020-10-13). "Library of Two-Dimensional Hybrid Lead Halide Perovskite Scintillator Crystals". Chemistry of Materials. 32 (19): 8530–8539. doi:10.1021/acs.chemmater.0c02789. ISSN 0897-4756. S2CID 224916409.
  17. ^ a b Maddalena, Francesco; Xie, Aozhen; Arramel; Witkowski, Marcin E.; Makowski, Michal; Mahler, Benoit; Drozdowski, Winicjusz; Mariyappan, Thambidurai; Springham, Stuart Victor; Coquet, Philippe; Dujardin, Christophe (2021-03-01). "Effect of commensurate lithium doping on the scintillation of two-dimensional perovskite crystals". Journal of Materials Chemistry C. 9 (7): 2504–2512. doi:10.1039/D0TC05647B. ISSN 2050-7534. S2CID 233789445.
  18. ^ Martin, L.W.; Chu, Y.-H.; Ramesh, R. (May 2010). "Advances in the growth and characterization of magnetic, ferroelectric, and multiferroic oxide thin films". Materials Science and Engineering: R: Reports. 68 (4–6): 89–133. doi:10.1016/j.mser.2010.03.001. S2CID 53337720.
  19. ^ Yang, G.Z; Lu, H.B; Chen, F; Zhao, T; Chen, Z.H (July 2001). "Laser molecular beam epitaxy and characterization of perovskite oxide thin films". Journal of Crystal Growth. 227–228 (1–4): 929–935. Bibcode:2001JCrGr.227..929Y. doi:10.1016/S0022-0248(01)00930-7.
  20. ^ Mannhart, J.; Schlom, D. G. (25 March 2010). "Oxide Interfaces--An Opportunity for Electronics". Science. 327 (5973): 1607–1611. Bibcode:2010Sci...327.1607M. doi:10.1126/science.1181862. PMID 20339065. S2CID 206523419.
  21. ^ Chakhalian, J.; Millis, A. J.; Rondinelli, J. (24 January 2012). "Whither the oxide interface". Nature Materials. 11 (2): 92–94. Bibcode:2012NatMa..11...92C. doi:10.1038/nmat3225. PMID 22270815.
  22. ^ Ohtomo, A.; Hwang, H. Y. (January 2004). "A high-mobility electron gas at the LaAlO3/SrTiO3 heterointerface". Nature. 427 (6973): 423–426. Bibcode:2004Natur.427..423O. doi:10.1038/nature02308. PMID 14749825. S2CID 4419873.
  23. ^ a b Haeni, J. H.; Irvin, P.; Chang, W.; Uecker, R.; Reiche, P.; Li, Y. L.; Choudhury, S.; Tian, W.; Hawley, M. E.; Craigo, B.; Tagantsev, A. K.; Pan, X. Q.; Streiffer, S. K.; Chen, L. Q.; Kirchoefer, S. W. (2004). "Room-temperature ferroelectricity in strained SrTiO3". Nature. 430 (7001): 758–761. Bibcode:2004Natur.430..758H. doi:10.1038/nature02773. hdl:2027.42/62658. ISSN 1476-4687. PMID 15306803. S2CID 4420317.
  24. ^ Woodward, P. M. (1997-02-01). "Octahedral Tilting in Perovskites. I. Geometrical Considerations". Acta Crystallographica Section B: Structural Science. 53 (1): 32–43. Bibcode:1997AcCrB..53...32W. doi:10.1107/S0108768196010713. ISSN 0108-7681.
  25. ^ Glazer, A. M. (1972-11-15). "The classification of tilted octahedra in perovskites". Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry. 28 (11): 3384–3392. Bibcode:1972AcCrB..28.3384G. doi:10.1107/S0567740872007976. ISSN 0567-7408.
  26. ^ John Lloyd; John Mitchinson (2006). "What's the commonest material in the world". QI: The Book of General Ignorance. Faber & Faber. ISBN 978-0-571-23368-7.
  27. ^ a b Vasala, Sami; Karppinen, Maarit (2015-05-01). "A2B′B"O6 perovskites: A review". Progress in Solid State Chemistry. 43 (1): 1–36. doi:10.1016/j.progsolidstchem.2014.08.001. ISSN 0079-6786.
  28. ^ Serrate, D; Teresa, J M De; Ibarra, M R (2007-01-17). "Double perovskites with ferromagnetism above room temperature". Journal of Physics: Condensed Matter. 19 (2): 023201. doi:10.1088/0953-8984/19/2/023201. ISSN 0953-8984. S2CID 94885699.
  29. ^ Meneghini, C.; Ray, Sugata; Liscio, F.; Bardelli, F.; Mobilio, S.; Sarma, D. D. (2009-07-22). "Nature of "Disorder" in the Ordered Double Perovskite Sr2FeMoO6". Physical Review Letters. 103 (4): 046403. Bibcode:2009PhRvL.103d6403M. doi:10.1103/PhysRevLett.103.046403. PMID 19659376.
  30. ^ Kulkarni, A; FT Ciacchi; S Giddey; C Munnings; et al. (2012). "Mixed ionic electronic conducting perovskite anode for direct carbon fuel cells". International Journal of Hydrogen Energy. 37 (24): 19092–19102. doi:10.1016/j.ijhydene.2012.09.141.
  31. ^ J. M. D. Coey; M. Viret; S. von Molnar (1999). "Mixed-valence manganites". Advances in Physics. 48 (2): 167–293. Bibcode:1999AdPhy..48..167C. doi:10.1080/000187399243455. S2CID 121555794.
  32. ^ Alexandra Witze (2010). "Building a cheaper catalyst". Science News Web Edition.
  33. ^ Lufaso, Michael W.; Woodward, Patrick M. (2004). "Jahn–Teller distortions, cation ordering and octahedral tilting in perovskites". Acta Crystallographica Section B. 60 (Pt 1): 10–20. Bibcode:2004AcCrB..60...10L. doi:10.1107/S0108768103026661. PMID 14734840.
  34. ^ "Capacitor Market Size, Share, Scope, Trends, Opportunities & Forecast". Verified Market Research. Retrieved 2022-12-15.
  35. ^ Merz, Walter J. (1949-10-15). "The Electric and Optical Behavior of BaTi${\mathrm{O}_{3}$ Single-Domain Crystals". Physical Review. 76 (8): 1221–1225. doi:10.1103/PhysRev.76.1221.
  36. ^ Eames, Christopher; Frost, Jarvist M.; Barnes, Piers R. F.; o'Regan, Brian C.; Walsh, Aron; Islam, M. Saiful (2015). "Ionic transport in hybrid lead iodide perovskite solar cells". Nature Communications. 6: 7497. Bibcode:2015NatCo...6.7497E. doi:10.1038/ncomms8497. PMC 4491179. PMID 26105623.
  37. ^ Bullis, Kevin (8 August 2013). "A Material That Could Make Solar Power "Dirt Cheap"". MIT Technology Review. Retrieved 9 May 2023.
  38. ^ a b Li, Hangqian. (2016). "A modified sequential deposition method for fabrication of perovskite solar cells". Solar Energy. 126: 243–251. Bibcode:2016SoEn..126..243L. doi:10.1016/j.solener.2015.12.045.
  39. ^ "Research Cell Efficiency Records" (PDF). Office of Energy Efficiency & Renewable Energy. 2020.
  40. ^ Zhu, Rui (2020-02-10). "Inverted devices are catching up". Nature Energy. 5 (2): 123–124. Bibcode:2020NatEn...5..123Z. doi:10.1038/s41560-020-0559-z. ISSN 2058-7546. S2CID 213535738.
  41. ^ Liu, Mingzhen; Johnston, Michael B.; Snaith, Henry J. (2013). "Efficient planar heterojunction perovskite solar cells by vapour deposition". Nature. 501 (7467): 395–398. Bibcode:2013Natur.501..395L. doi:10.1038/nature12509. PMID 24025775. S2CID 205235359.
  42. ^ Lotsch, B.V. (2014). "New Light on an Old Story: Perovskites Go Solar". Angew. Chem. Int. Ed. 53 (3): 635–637. doi:10.1002/anie.201309368. PMID 24353055.
  43. ^ Service, R. (2013). "Turning Up the Light". Science. 342 (6160): 794–797. Bibcode:2013Sci...342..794S. doi:10.1126/science.342.6160.794. PMID 24233703.
  44. ^ "Nanoscale discovery could push perovskite solar cells to 31% efficency (sic)". 2016-07-04.
  45. ^ a b c d Hodes, G. (2013). "Perovskite-Based Solar Cells". Science. 342 (6156): 317–318. Bibcode:2013Sci...342..317H. doi:10.1126/science.1245473. PMID 24136955. S2CID 41656229.
  46. ^ Liu, Shuhao; Wang, Lili; Lin, Wei-Chun; Sucharitakul, Sukrit; Burda, Clemens; Gao, Xuan P. A. (2016-12-14). "Imaging the Long Transport Lengths of Photo-generated Carriers in Oriented Perovskite Films". Nano Letters. 16 (12): 7925–7929. arXiv:1610.06165. Bibcode:2016NanoL..16.7925L. doi:10.1021/acs.nanolett.6b04235. ISSN 1530-6984. PMID 27960525. S2CID 1695198.
  47. ^ Lai, Hei Ming (April 27, 2022). "Direct Room Temperature Synthesis of α-CsPbI3 Perovskite Nanocrystals with High Photoluminescence Quantum Yields: Implications for Lighting and Photovoltaic Applications". ACS Appl. Nano Mater. 5 (9): 12366–12373. doi:10.1021/acsanm.2c00732.
  48. ^ Liu, M.; Johnston, M. B.; Snaith, H. J. (2013). "Efficient planar heterojunction perovskite solar cells by vapour deposition". Nature. 501 (7467): 395–398. Bibcode:2013Natur.501..395L. doi:10.1038/nature12509. PMID 24025775. S2CID 205235359.
  49. ^ Dereń, P. J.; Bednarkiewicz, A.; Goldner, Ph.; Guillot-Noël, O. (2008). "Laser action in LaAlO3:Nd3+ single crystal". Journal of Applied Physics. 103 (4): 043102–043102–8. Bibcode:2008JAP...103d3102D. doi:10.1063/1.2842399.
  50. ^ Wallace, John (28 March 2014) High-efficiency perovskite photovoltaic material also lases. LaserFocusWorld
  51. ^ "Study: Perovskite solar cells can double as lasers". Rdmag.com. 2014-03-28. Retrieved 2014-08-24.
  52. ^ Stranks, Samuel D.; Snaith, Henry J. (2015-05-01). "Metal-halide perovskites for photovoltaic and light-emitting devices". Nature Nanotechnology. 10 (5): 391–402. Bibcode:2015NatNa..10..391S. doi:10.1038/nnano.2015.90. ISSN 1748-3387. PMID 25947963.
  53. ^ Wang, Heyong; Kosasih, Felix Utama; Yu, Hongling; Zheng, Guanhaojie; Zhang, Jiangbin; Pozina, Galia; Liu, Yang; Bao, Chunxiong; Hu, Zhangjun; Liu, Xianjie; Kobera, Libor; Abbrent, Sabina; Brus, Jiri; Jin, Yizheng; Fahlman, Mats; Friend, Richard H.; Ducati, Caterina; Liu, Xiao-Ke; Gao, Feng (December 2020). "Perovskite-molecule composite thin films for efficient and stable light-emitting diodes". Nature Communications. 11 (1): 891. Bibcode:2020NatCo..11..891W. doi:10.1038/s41467-020-14747-6. PMC 7021679. PMID 32060279.
  54. ^ Andaji‐Garmaroudi, Zahra; Abdi‐Jalebi, Mojtaba; Kosasih, Felix U.; Doherty, Tiarnan; Macpherson, Stuart; Bowman, Alan R.; Man, Gabriel J.; Cappel, Ute B.; Rensmo, Håkan; Ducati, Caterina; Friend, Richard H.; Stranks, Samuel D. (December 2020). "Elucidating and Mitigating Degradation Processes in Perovskite Light‐Emitting Diodes". Advanced Energy Materials. 10 (48): 2002676. doi:10.1002/aenm.202002676. S2CID 228806435.
  55. ^ Jingshan Luo; et al. (26 September 2014). "Water photolysis at 12.3% efficiency via perovskite photovoltaics and Earth-abundant catalysts". Science. 345 (6204): 1593–1596. Bibcode:2014Sci...345.1593L. doi:10.1126/science.1258307. PMID 25258076. S2CID 24613846.
  56. ^ "Harvesting hydrogen fuel from the Sun using Earth-abundant materials". Phys.org. Sep 25, 2014. Retrieved 26 September 2014.
  57. ^ Moszynski, M (11 January 1997). "Properties of the new LuAP:Ce scintillator". Nuclear Instruments and Methods in Physics Research A. 385 (1): 123–131. Bibcode:1997NIMPA.385..123M. doi:10.1016/S0168-9002(96)00875-3.
  58. ^ Maddalena, Francesco; Tjahjana, Liliana; Xie, Aozhen; Arramel; Zeng, Shuwen; Wang, Hong; Coquet, Philippe; Drozdowski, Winicjusz; Dujardin, Christophe; Dang, Cuong; Birowosuto, Muhammad Danang (February 2019). "Inorganic, Organic, and Perovskite Halides with Nanotechnology for High–Light Yield X- and γ-ray Scintillators". Crystals. 9 (2): 88. doi:10.3390/cryst9020088. hdl:10356/107027.
  59. ^ Kishimoto, S (29 December 2008). "Subnanosecond time-resolved x-ray measurements using an organic-inorganic perovskite scintillator". Appl. Phys. Lett. 93 (26): 261901. Bibcode:2008ApPhL..93z1901K. doi:10.1063/1.3059562.
  60. ^ Birowosuto, Muhammad Danang (16 November 2016). "X-ray Scintillation in Lead Halide Perovskite Crystals". Sci. Rep. 6: 37254. arXiv:1611.05862. Bibcode:2016NatSR...637254B. doi:10.1038/srep37254. PMC 5111063. PMID 27849019.
  61. ^ Chen, Quishui (27 August 2018). "All-inorganic perovskite nanocrystal scintillators". Nature. 561 (7721): 88–93. Bibcode:2018Natur.561...88C. doi:10.1038/s41586-018-0451-1. PMID 30150772. S2CID 52096794.
  62. ^ Xie, Aozhen; Hettiarachchi, Chathuranga; Maddalena, Francesco; Witkowski, Marcin E.; Makowski, Michał; Drozdowski, Winicjusz; Arramel, Arramel; Wee, Andrew T. S.; Springham, Stuart Victor; Vuong, Phan Quoc; Kim, Hong Joo (2020-06-24). "Lithium-doped two-dimensional perovskite scintillator for wide-range radiation detection". Communications Materials. 1 (1): 37. Bibcode:2020CoMat...1...37X. doi:10.1038/s43246-020-0038-x. hdl:10356/164062. ISSN 2662-4443.

Further reading

  • Tejuca, Luis G (1993). Properties and applications of perovskite-type oxides. New York: Dekker. p. 382. ISBN 978-0-8247-8786-8.
  • Mitchell, Roger H (2002). Perovskites modern and ancient. Thunder Bay, Ontario: Almaz Press. p. 318. ISBN 978-0-9689411-0-2.

External links