Themed collection Perovskites
ABO3 and A1−xCxB1−yDy(O1−zEz)3: review of experimental optimisation of thin film perovskites by high-throughput evaporative physical vapour deposition
High throughput perovskite thin films made by evaporative physical vapour deposition gives unprecedented access to composition-properties relationships.
Charge transitions in perovskite oxides containing unusually high-valent Fe
Localisation of charge carrying ligand holes in perovskite oxides containing high-valent iron leads to unusual structural, magnetic, and transport behavior.
Atomic layer deposition for efficient and stable perovskite solar cells
Extended understandings of perovskite solar cells by recent ALD application studies as well as challenges toward enhancing the efficiency and stability will be addressed.
Hexagonal perovskite derivatives: a new direction in the design of oxide ion conducting materials
A structural rearrangement is observed in Ba3MM′O8.5 hexagonal perovskites above 300 °C, which enhances the oxide ionic conductivity.
Morphological and compositional progress in halide perovskite solar cells
Perovskite solar cells (PSCs) reached a certified 23.7% efficiency in 2018 by boosting their surprisingly high open-circuit voltage (VOC) and photocurrent.
High pressure synthesis of a quasi-one-dimensional GdFeO3-type perovskite PrCuO3 with nearly divalent Cu ions
A new perovskite-type cuprate PrCuO3 with unusual oxidation state and quasi-one-dimensional Cu–O chains has been synthesized by high-pressure oxygen annealing.
Sr2Fe1+xRe1−xO6 double perovskites: magnetoresistance and (magneto)thermopower
Polycrystalline Sr2Fe1+xRe1−xO6 samples have been synthesized, structurally characterized by X-ray powder diffraction, transmission electron microscopy, X-ray absorption spectroscopy, and measurements of their magnetotransport properties were performed.
Inorganic co-crystal formation and thermal disproportionation in a dicyanometallate ‘superperovskite’
The dicyanometallate superperovskite co-crystal [NBu4]Mn[Au(CN)2]3·[NBu4]ClO4 illustrates a new type of structural and phase complexity accessible to dicyanometallate perovskites.
Mechanochemical synthesis of 0D and 3D cesium lead mixed halide perovskites
A simplified mechanochemical synthesis approach for Cs-containing mixed halide perovskite materials of lower and higher dimensionality (0D and 3D, respectively) is presented with stoichiometric control from their halide salts, CsX and PbX2 (X = Cl, Br, I).
Structural studies of the perovskite series La1−xSrxCoO3−δ during chemical looping with methane
Perovskite oxides are promising materials as oxygen carriers in chemical looping applications.
Efficient large guanidinium mixed perovskite solar cells with enhanced photovoltage and low energy losses
We present a strategy for suppressing the open-circuit voltage (Voc) loss of perovskite solar cells by incorporating large guanidinium cations (Gua+) into a perovskite lattice, leading to a significantly improved Voc of 1.19 V and an impressive power conversion efficiency of >21%.
Performance enhancement of AgBi2I7 solar cells by modulating a solvent-mediated adduct and tuning remnant BiI3 in one-step crystallization
We modulated a solvent-mediated adduct for one-step crystallization of lead-free AgBi2I7 at a lower temperature (90 °C) and to obtain remnant BiI3 by controlling the nature of the substrate and precursor concentration.
Squeezing electrons out of 6s2 lone-pairs in perovskite-type oxides
Unit cell volume collapse in Ba2BiRuO6, Ba2BiIrO6 and Ba2BiOsO6 when Bi(III) is oxidised to Bi(V) by external applied pressure.
A perovskite-type Nd0.75Sr0.25Co0.8Fe0.2O3−δ cathode for advanced solid oxide fuel cells
Perovskite-type Nd0.75Sr0.25Co0.8Fe0.2O3−δ (NSCF) has shown excellent oxygen reduction reaction properties (an area specific polarization resistance of 0.1 Ω cm2 at 700 °C) as a composite cathode (30 wt% La0.8Sr0.2Ga0.8Mg0.2O3−δ (LSGM)) with remarkable chemical stability under CO2.
Enhanced visible light absorption for lead-free double perovskite Cs2AgSbBr6
Lead-free double perovskite Cs2AgSbBr6 is synthesized to show a low indirect bandgap of 1.64 eV.
The hidden story in BaNiO3 to BaNiO2 transformation: adaptive structural series and NiO exsolution
Crystal-to-crystal transformation from BaNiO3 to BaNiO2 is reported.
Mn2CoReO6: a robust multisublattice antiferromagnetic perovskite with small A-site cations
Small A-site cations (Mn2+) induce complex magnetic structures in this transition-metal-only double perovskite.
Anionic order and band gap engineering in vacancy ordered triple perovskites
Exchanging the iodide for bromide on Cs3Bi2Br9 redshifts the absorption band while maintaining the Cs3Bi2Br9 structure.
Topochemical nitridation of Sr2FeMoO6
The topotactic nitridation of cation ordered Sr2FeMoO6 in NH3 leads to cubic, Fmm oxynitride Sr2FeMoO4.9N1.1 showing ferromagnetic order and negative magnetoresistance below 100 K.
Negative thermal expansion in high pressure layered perovskite Ca2GeO4
We report the high pressure synthesis of a layered perovskite Ca2GeO4 which is found to have the Ruddlesden–Popper structure with I41/acd symmetry, and to display pronounced uniaxial negative thermal expansion.
Polymorphism in M(H2PO2)3 (M = V, Al, Ga) compounds with the perovskite-related ReO3 structure
The connectivity of the ReO3 structure is reproduced in a series of hypophosphite compounds, M(H2PO2)3, where M = V, Al, Ga.
Linear assembly of lead bromide-based nanoparticles inside lead(II) polymers prepared by mixing the precursors of both the nanoparticle and the polymer
Preparation of 1D assemblies of lead halide-based nanoparticles inside a lead bromide polymer by concurrent formation of lead(II) oligomers and the nanoparticles in the presence of cyclohexanemethylammonium bromide.
BaCoO2+δ: a new highly oxygen deficient perovskite-related phase with unusual Co coordination obtained by high temperature reaction with short reaction times
A pinch of oxygen: incorporation of small additional oxygen introduces partly square planar coordination into BaCoO2+δ.
A low-temperature carbon electrode with good perovskite compatibility and high flexibility in carbon based perovskite solar cells
A low-temperature carbon electrode with good perovskite compatibility is employed in hole-transport-material free perovskite solar cells, and a champion power conversion efficiency (PCE) of 11.7% is obtained.
Tuning octahedral tilts and the polar nature of A-site deficient perovskites
This work explores the possibility of tuning the structural chemistry of A-site deficient perovskite materials Ln1/3NbO3, and the balance between proper and hybrid-improper mechanisms for polar behaviour in these systems.
Ferri- and ferro-magnetism in CaMnMReO6 double double perovskites of late transition metals M = Co and Ni
Doubly ordered perovskites are reported for CaMnMReO6 (M = Co, Ni). CaMnNiReO6 is a remarkable example of a ferromagnetic oxide with four distinct spin sublattices all collinearly ordered below TC = 152 K.
Selective fluorination of perovskite iron oxide/ruthenium oxide heterostructures via a topotactic reaction
SrFeO2F/SrRuO3 epitaxial bilayer films were fabricated via a topotactic reaction with polyvinylidene difluoride while maintaining the epitaxial relationship.
Atomic layer deposition of a SnO2 electron-transporting layer for planar perovskite solar cells with a power conversion efficiency of 18.3%
High-efficiency planar type perovskite solar cells were fabricated by atomic layer deposition (ALD) of SnO2 and subsequent annealing at 180 °C.
Assessment of magnetic properties of A2B′B′′O6 double perovskites by multivariate data analysis techniques
Multivariate data analysis is used in search of novel magnetically ordered perovskite oxides of the A2B′B′′O6 type.
Iodide-ion conduction in methylammonium lead iodide perovskite: some extraordinary aspects
Certain surprising aspects of iodide-ion conduction in MAPbI3, such as the low migration barrier and the dominance of anti-Frenkel disorder, are discussed.
Magnetic interactions in the S = 1/2 square-lattice antiferromagnets Ba2CuTeO6 and Ba2CuWO6: parent phases of a possible spin liquid
Magnetic interactions in double perovskites Ba2CuTeO6 and Ba2CuWO6 are characterized leading to a prediction of a spin-liquid-like state in Ba2Cu(Te1−xWx)O6.
The capricious nature of iodine catenation in I2 excess, perovskite-derived hybrid Pt(IV) compounds
Perovskite-derived hybrid platinum iodides with the general formula A2PtIVI6 (A = formamidinium FA and guanidinium GUA) accommodate excess I2 to yield hydrogen-bond-stabilized compounds where the I2 forms catenates with I− anions on the PtI6 octahedra.
Ambient condition retention of band-gap tuning in MAPbI3 induced by high pressure quenching
In the present work, we show a successful approach to achieve stable structural and optical changes induced by pressure on bulk amounts of MAPI after pressure release.
About this collection
We are delighted to bring you this Themed Collection on Perovskites, Guest Edited by Michael Hayward (University of Oxford), Nam-Gyu Park (Sungkyunkwan University) and Peter Slater (University of Birmingham). Perovskite materials are ubiquitous in a range of areas, e.g. magnetism, ionic and electronic conduction, catalysis. Hybrid organic-inorganic perovskites have also attracted an explosion of interest due to their potential applications in low cost solar cells. Research in all these areas has shown the flexibility of the perovskite structure, which allows the structure and properties to be tailored through appropriate chemical manipulations on both cation and anion sites.