Angewandte Chemie · 2019 · 85 citations · 47 references
Natural SciencesChemistryMaterials ScienceInorganic ChemistryMaterials ChemistryOptical MaterialsFluorescence SpectroscopyInorganic SpectroscopyLuminescent MaterialsOptical Properties Of SolidsOptoelectronic MaterialsPerovskite MaterialsHalide PerovskitesHumidity SensingLead-free PerovskitesOptoelectronic PropertiesPerovskite Crystal StructurePhotoluminescencePhotoluminescence Quantum YieldStructural Deformation
Abstract Low‐dimensional luminescent lead halide perovskites have attracted tremendous attention for their fascinating optoelectronic properties, while the toxicity of lead is still considered a drawback. Herein, we report a novel lead‐free zero‐dimensional (0D) indium‐based perovskite (Cs 2 InBr 5 ⋅H 2 O) single crystal that is red‐luminescent with a high photoluminescence quantum yield (PLQY) of 33 %. Experimental and computational studies reveal that the strong PL emission might originate from self‐trapping excitons (STEs) that result from an excited‐state structural deformation. More importantly, the in situ transformation between hydrated Cs 2 InBr 5 ⋅H 2 O and the dehydrated form is accompanied with a switchable dual emission, which enables it to act as a PL water‐sensor in humidity detection or the detection of traces of water in organic solvents.
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Loredana Proteşescu, Sergii Yakunin, Maryna I. Bodnarchuk et al. · Nano Letters · 2015 · 9K citations · Full text
Natural Sciences, Materials Engineering, Materials Science +17
Highly efficient phosphorescent emission from organic electroluminescent devices
Marc A. Baldo, D. F. O’Brien, Yujian You et al. · Nature · 1998 · 7.2K citations
Efficient and stable emission of warm-white light from lead-free halide double perovskites
Jiajun Luo, Xiaoming Wang, Shunran Li et al. · Nature · 2018 · 2.2K citations · Full text