Trihalide
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High-quality bulk hybrid perovskite single crystals within minutes by inverse temperature crystallization Open
Single crystals of methylammonium lead trihalide perovskites (MAPbX 3 ; MA=CH 3 NH 3 + , X=Br − or I − ) have shown remarkably low trap density and charge transport properties; however, growth of such high-quality semiconductors is a time-…
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The Role of Oxygen in the Degradation of Methylammonium Lead Trihalide Perovskite Photoactive Layers Open
In this paper we report on the influence of light and oxygen on the stability of CH 3 NH 3 PbI 3 perovskite‐based photoactive layers. When exposed to both light and dry air the mp‐Al 2 O 3 /CH 3 NH 3 PbI 3 photoactive layers rapidly decomp…
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Scalable fabrication of efficient organolead trihalide perovskite solar cells with doctor-bladed active layers Open
Scalable fabrication of perovskite solar cells by doctor-blading is demonstrated with a device efficiency of 15.1% under 1 sun light.
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High Performance and Stable All‐Inorganic Metal Halide Perovskite‐Based Photodetectors for Optical Communication Applications Open
Photodetectors are critical parts of an optical communication system for achieving efficient photoelectronic conversion of signals, and the response speed directly determines the bandwidth of the whole system. Metal halide perovskites, an …
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Polymer‐Passivated Inorganic Cesium Lead Mixed‐Halide Perovskites for Stable and Efficient Solar Cells with High Open‐Circuit Voltage over 1.3 V Open
Cesium‐based trihalide perovskites have been demonstrated as promising light absorbers for photovoltaic applications due to their superb composition stability. However, the large energy losses ( E loss ) observed in inorganic perovskite so…
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Recent Advances in Improving the Stability of Perovskite Solar Cells Open
Organometal trihalide perovskites have recently emerged as promising materials for low‐cost, high‐efficiency solar cells. In less than five years, the efficiency of perovskite solar cells (PSC) has been updated rapidly as a result of new s…
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Two-Dimensional Dion–Jacobson Hybrid Lead Iodide Perovskites with Aromatic Diammonium Cations Open
Two-dimensional (2D) halide perovskites have extraordinary optoelectronic properties and structural tunability. Among them, the Dion-Jacobson phases with the inorganic layers stacking exactly on top of each other are less explored. Herein,…
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Simultaneous band-gap narrowing and carrier-lifetime prolongation of organic–inorganic trihalide perovskites Open
Significance The emergence of organic–inorganic hybrid lead triiodide perovskite materials promises a low-cost and high-efficiency photovoltaic technology. Although the high-power conversion efficiency of this technology has been successfu…
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Spin-optoelectronic devices based on hybrid organic-inorganic trihalide perovskites Open
Recently the hybrid organic-inorganic trihalide perovskites have shown remarkable performance as active layers in photovoltaic and other optoelectronic devices. However, their spin characteristic properties have not been fully studied, alt…
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Shallow Iodine Defects Accelerate the Degradation of α-Phase Formamidinium Perovskite Open
Shallow defects are mostly benign in covalent semiconductors, such as silicon, given that they do not constitute non-radiative recombination sites. In contrast, the existence of shallow defects in ionic perovskite crystals might have signi…
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Stabilized Wide Bandgap MAPbBr<i><sub>x</sub></i>I<sub>3–<i>x</i></sub> Perovskite by Enhanced Grain Size and Improved Crystallinity Open
The light instability of CH3NH3PbI x Br3-x is one of the biggest challenges for its application in tandem solar cells. Here we show that an improved crystallinity and grain size of CH3NH3PbI x Br3-x films could stabilize these materials un…
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Two-Dimensional Organic Tin Halide Perovskites with Tunable Visible Emission and Their Use in Light-Emitting Devices Open
Hybrid organic lead trihalide perovskites continue to generate significant interest for use in optoelectronic devices such as solar cells and light-emitting devices. However, the toxicity of lead is considered one of the main obstacles to …
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Exciton localization in solution-processed organolead trihalide perovskites Open
Organolead trihalide perovskites have attracted great attention due to the stunning advances in both photovoltaic and light-emitting devices. However, the photophysical properties, especially the recombination dynamics of photogenerated ca…
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Light‐Induced Self‐Poling Effect on Organometal Trihalide Perovskite Solar Cells for Increased Device Efficiency and Stability Open
Continuous illumination of the organometal trihalide perovskite (OTP) devices can cause the photovoltaic poling effect, termed light-induced self-poling (LISP), which improves the stabilized device efficiency significantly. The effect of L…
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Tolerance of Perovskite Solar Cell to High-Energy Particle Irradiations in Space Environment Open
Materials to be used in the space environment have to withstand extreme conditions, particularly with respect to cosmic particle irradiation. We report robust stability and high tolerance of organolead trihalide perovskite solar cells agai…
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Benzotrithiophene‐Based Hole‐Transporting Materials for 18.2 % Perovskite Solar Cells Open
New star‐shaped benzotrithiophene (BTT)‐based hole‐transporting materials (HTM) BTT‐1, BTT‐2 and BTT‐3 have been obtained through a facile synthetic route by crosslinking triarylamine‐based donor groups with a benzotrithiophene (BTT) core.…
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Large formamidinium lead trihalide perovskite solar cells using chemical vapor deposition with high reproducibility and tunable chlorine concentrations Open
Formamidinium perovskite films have been prepared by chemical vapor deposition, with cells demonstrating PCEs up to 14.2%, stability up to 155 days, semitransparency, large-area (1 cm2), and tunable chlorine concentrations.
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Perovskite Photovoltaics with Outstanding Performance Produced by Chemical Conversion of Bilayer Mesostructured Lead Halide/TiO<sub>2</sub> Films Open
A new method of producing high-quality perovskite films via sequential deposition is presented, introducing a PbX2 capping layer that is endowed with a network of interconnected nanopores. The mesoporous lead halide architecture provides a…
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Improved environmental stability of organic lead trihalide perovskite-based photoactive-layers in the presence of mesoporous TiO<sub>2</sub> Open
Transient absorption spectroscopy is used to study the charge transfer processes in methyl ammonium lead triiodide based photoactive layers under ambient and inert conditions.
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Organic Cation Rotation and Immobilization in Pure and Mixed Methylammonium Lead-Halide Perovskites Open
Three-dimensional lead-halide perovskites have attracted a lot of attention due to their ability to combine solution processing with outstanding optoelectronic properties. Despite their soft ionic nature these materials demonstrate a surpr…
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Tracking Structural Phase Transitions in Lead‐Halide Perovskites by Means of Thermal Expansion Open
The extraordinary properties of lead‐halide perovskite materials have spurred intense research, as they have a realistic perspective to play an important role in future photovoltaic devices. It is known that these materials undergo a numbe…
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Enhancing Ion Migration in Grain Boundaries of Hybrid Organic–Inorganic Perovskites by Chlorine Open
Ionicity plays an important role in determining material properties, as well as optoelectronic performance of organometallic trihalide perovskites (OTPs). Ion migration in OTP films has recently been under intensive investigation by variou…
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Influence of the Synthetic Procedures on the Structural and Optical Properties of Mixed-Halide (Br, I) Perovskite Films Open
The influence of thermal treatments on the properties of mixed bromide-iodide organolead perovskites (MAPbI(3-x)Br(x), MA = CH3NH3) is investigated in films prepared in air by single-step solution processes based on different precursor sol…
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Distinct Exciton Dissociation Behavior of Organolead Trihalide Perovskite and Excitonic Semiconductors Studied in the Same System Open
The nonexcitonic character for organometal trihalide perovskites is demonstrated by examining the field-dependent exciton dissociation behavior. It is found that photogenerated excitons can be effectively dissociated into free charges insi…
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Polymer Nanoreactors Shield Perovskite Nanocrystals from Degradation Open
Halide perovskite nanocrystals (NCs) have shown impressive advances, exhibiting optical properties that outpace conventional semiconductor NCs, such as near-unity quantum yields and ultrafast radiative decay rates. Nevertheless, the NCs su…
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Organic solvent vapor sensitive methylammonium lead trihalide film formation for efficient hybrid perovskite solar cells Open
Organic solvent vapor introduced during the formation of hybrid perovskite films changes the grain orientation and reduces charge recombination.
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Trihalide ionic liquids as non-volatile oxidizing solvents for metals Open
Various trihalide ionic liquids were prepared and used as non-volatile solvent to oxidatively dissolve metals.
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Two‐Dimensional Antimony‐Based Perovskite‐Inspired Materials for High‐Performance Self‐Powered Photodetectors Open
The ongoing Internet of Things revolution has led to strong demand for low‐cost, ubiquitous light sensing based on easy‐to‐fabricate, self‐powered photodetectors. While solution‐processable lead‐halide perovskites have raised significant h…
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Focused-ion beam patterning of organolead trihalide perovskite for subwavelength grating nanophotonic applications Open
The coherent amplified spontaneous emission and high photoluminescence quantum efficiency of organolead trihalide perovskite have led to research interest in this material for use in photonic devices. In this paper, the authors present a f…
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The physics of photon induced degradation of perovskite solar cells Open
Lead-trihalide perovskite solar cells are an important photovoltaic technology. We investigate the effect of light induced degradation on perovskite solar cells. During exposure, the open-circuit voltage (Voc) of the device increases, wher…