Iodide
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Ruddlesden–Popper Hybrid Lead Iodide Perovskite 2D Homologous Semiconductors Open
The hybrid two-dimensional (2D) halide perovskites have recently drawn significant interest because they can serve as excellent photoabsorbers in perovskite solar cells. Here we present the large scale synthesis, crystal structure, and opt…
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Intriguing Optoelectronic Properties of Metal Halide Perovskites Open
A new chapter in the long and distinguished history of perovskites is being written with the breakthrough success of metal halide perovskites (MHPs) as solution-processed photovoltaic (PV) absorbers. The current surge in MHP research has l…
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Thermodynamically stabilized β-CsPbI <sub>3</sub> –based perovskite solar cells with efficiencies >18% Open
Tetragonal phases for perovskite solar cells The power conversion efficiencies (PCEs) of all-inorganic perovskites are lower than those of materials with organic cations. This is in part because these materials have larger bandgaps. The cu…
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On the application of the tolerance factor to inorganic and hybrid halide perovskites: a revised system Open
Can new hybrid perovskites be predicted using the tolerance factor?
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Methylammonium-free, high-performance, and stable perovskite solar cells on a planar architecture Open
Staying in the black phase Hybrid perovskite solar cells often use the more thermally stable formamidinium (FA) cation rather than methylammonium, but its larger size can create lattice distortion that results in an inactive yellow phase. …
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Hybrid Dion–Jacobson 2D Lead Iodide Perovskites Open
The three-dimensional hybrid organic-inorganic perovskites have shown huge potential for use in solar cells and other optoelectronic devices. Although these materials are under intense investigation, derivative materials with lower dimensi…
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Highly Reproducible Sn‐Based Hybrid Perovskite Solar Cells with 9% Efficiency Open
The low power conversion efficiency (PCE) of tin‐based hybrid perovskite solar cells (HPSCs) is mainly attributed to the high background carrier density due to a high density of intrinsic defects such as Sn vacancies and oxidized species (…
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Thermochromic halide perovskite solar cells Open
Smart photovoltaic windows represent a promising green technology featuring tunable transparency and electrical power generation under external stimuli to control the light transmission and manage the solar energy. Here, we demonstrate a t…
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Band Gap Tuning via Lattice Contraction and Octahedral Tilting in Perovskite Materials for Photovoltaics Open
Tin and lead iodide perovskite semiconductors of the composition AMX3, where M is a metal and X is a halide, are leading candidates for high efficiency low cost tandem photovoltaics, in part because they have band gaps that can be tuned ov…
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Exploration of the compositional space for mixed lead halogen perovskites for high efficiency solar cells Open
A systematic investigation of the compositional space for perovskite solar cells spanned by MAPbI3, MAPbBr3, FAPbI3and FAPbBr3.
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Photon recycling in lead iodide perovskite solar cells Open
Perovskite solar cells recycle photons Inorganic-organic perovskite solar cells are very efficient in part because the charge carriers exhibit very long path lengths. Pazos-Outón et al. show that photon recycling, as seen previously in hig…
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Bication lead iodide 2D perovskite component to stabilize inorganic α-CsPbI <sub>3</sub> perovskite phase for high-efficiency solar cells Open
A facile preparation of phase-stable cesium lead triiodide perovskite for high-performance solar cells.
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Phenylalkylamine Passivation of Organolead Halide Perovskites Enabling High‐Efficiency and Air‐Stable Photovoltaic Cells Open
Benzylamine is introduced as a surface passivation molecule that improves the moisture-resistance of the perovskites while simultaneously enhancing their electronic properties. Solar cells based on benzylamine-modified formamidinium lead i…
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Defect-Assisted Photoinduced Halide Segregation in Mixed-Halide Perovskite Thin Films Open
Solution-processable metal halide perovskites show immense promise for use in photovoltaics and other optoelectronic applications. The ability to tune their bandgap by alloying various halide anions (for example, in CH3NH3Pb(I1–x Br x )3,…
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Photovoltaic mixed-cation lead mixed-halide perovskites: links between crystallinity, photo-stability and electronic properties Open
We establish compositional effects on stability, crystallinity, charge-carrier life times and mobilities in mixed-cation lead iodide-bromide perovskites as band gap tunable materials for multi-junction photovoltaic cells.
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Cubic or Orthorhombic? Revealing the Crystal Structure of Metastable Black-Phase CsPbI<sub>3</sub> by Theory and Experiment Open
Room-temperature films of black-phase cesium lead iodide (CsPbI3) are widely thought to be trapped in a cubic perovskite polymorph. Here, we challenge this assumption. We present structural refinement of room-temperature black-phase CsPbI3…
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Facile fabrication of large-grain CH3NH3PbI3−xBrx films for high-efficiency solar cells via CH3NH3Br-selective Ostwald ripening Open
Organometallic halide perovskite solar cells (PSCs) have shown great promise as a low-cost, high-efficiency photovoltaic technology. Structural and electro-optical properties of the perovskite absorber layer are most critical to device ope…
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Dismantling the “Red Wall” of Colloidal Perovskites: Highly Luminescent Formamidinium and Formamidinium–Cesium Lead Iodide Nanocrystals Open
Colloidal nanocrystals (NCs) of APbX3-type lead halide perovskites [A = Cs+, CH3NH3+ (methylammonium or MA+) or CH(NH2)2+ (formamidinium or FA+); X = Cl-, Br-, I-] have recently emerged as highly versatile photonic sources for applications…
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A facile strategy for realizing room temperature phosphorescence and single molecule white light emission Open
Research on materials with pure organic room temperature phosphorescence (RTP) and their application as organic single-molecule white light emitters is a hot area and relies on the design of highly efficient pure organic RTP luminogens. He…
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Efficient vacuum deposited p-i-n and n-i-p perovskite solar cells employing doped charge transport layers Open
Methylammonium lead halide perovskites have emerged as high performance photovoltaic materials. Most of these solar cells are prepared via solution-processing and record efficiencies (>20%) have been obtained employing perovskites with mix…
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Mixed‐Organic‐Cation Tin Iodide for Lead‐Free Perovskite Solar Cells with an Efficiency of 8.12% Open
In this work, a fully tin‐based, mixed‐organic‐cation perovskite absorber (FA) x (MA) 1− x SnI 3 (FA = NH 2 CH = NH 2 + , MA = CH 3 NH 3 + ) for lead‐free perovskite solar cells (PSCs) with inverted structure is presented. By optimizing th…
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All-inorganic cesium lead iodide perovskite solar cells with stabilized efficiency beyond 15% Open
As the black cesium lead iodide (CsPbI 3 ) tends to transit into a yellow δ-phase at ambient, it is imperative to develop a stabilized black phase for photovoltaic applications. Herein, we report a distorted black CsPbI 3 film by exploitin…
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Spin-dependent charge transport through 2D chiral hybrid lead-iodide perovskites Open
Chiral molecules in Pb-halide 2D-layered films achieve up to 86% spin-polarized transport, enabling novel spintronic applications.
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Quantification of light-enhanced ionic transport in lead iodide perovskite thin films and its solar cell applications Open
Ionic transport in organometal halide perovskites is of vital importance because it dominates anomalous phenomena in perovskite solar cells, from hysteresis to switchable photovoltaic effects. However, excited state ionic transport under i…
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Understanding charge transport in lead iodide perovskite thin-film field-effect transistors Open
Band-like charge transport is observed in lead halide perovskite field-effect transistors.
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Fabrication of Efficient Low-Bandgap Perovskite Solar Cells by Combining Formamidinium Tin Iodide with Methylammonium Lead Iodide Open
Mixed tin (Sn)-lead (Pb) perovskites with high Sn content exhibit low bandgaps suitable for fabricating the bottom cell of perovskite-based tandem solar cells. In this work, we report on the fabrication of efficient mixed Sn-Pb perovskite …
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Beyond methylammonium lead iodide: prospects for the emergent field of ns<sup>2</sup>containing solar absorbers Open
In this review we look beyond CH3NH3PbI3to otherns2containing solar absorbers, with the aim of identifying those materials likely to achieve high efficiencies.
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Direct calorimetric verification of thermodynamic instability of lead halide hybrid perovskites Open
Significance Organic metal halide perovskites are a promising class of materials for next-generation solar cells. However, they are chemically labile, raising questions of thermodynamic stability and posing a significant challenge for thei…
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Influence of Solvent Coordination on Hybrid Organic–Inorganic Perovskite Formation Open
Solution-processed hybrid organic–inorganic perovskites (HOIPs) from organoammonium halide and lead halide precursors form efficacious active layers for photovoltaics, light-emitting diodes, and flexible electronics. Though solvent–solute …
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Tracking Iodide and Bromide Ion Segregation in Mixed Halide Lead Perovskites during Photoirradiation Open
Mixed halide lead perovskites (e.g., CH3NH3PbBrxI3-x) undergo phase segregation creating iodide-rich and bromide-rich domains when subjected to visible irradiation. This intriguing aspect of halide ion movement in mixed halide films is now…