Angewandte Chemie International Edition · 2020 · 242 citations · 37 references
Natural SciencesMaterials EngineeringMaterials ScienceInorganic ChemistryOptical MaterialsSemiconductor MaterialsCrystal ChemistryInorganic MaterialsLuminescent MaterialsOptical Properties Of SemiconductorsOptical Properties Of SolidsPerovskite MaterialsColor Appearance ChangesLead-free PerovskitesOptoelectronic PropertiesPerovskite Luminescent MaterialsPerovskite SemiconductorsPhotoluminescencePhotoluminescence Quantum YieldTransient Absorption Spectroscopy
Abstract Zero‐dimensional (0D) lead‐free perovskites have unique structures and optoelectronic properties. Undoped and Sb‐doped all inorganic, lead‐free, 0D perovskite single crystals A 2 InCl 5 (H 2 O) (A=Rb, Cs) are presented that exhibit greatly enhanced yellow emission. To study the effect of coordination H 2 O, Sb‐doped A 3 InCl 6 (A=Rb, Cs) are also synthesized and further studied. The photoluminescence (PL) color changes from yellow to green emission. Interestingly, the photoluminescence quantum yield (PLQY) realizes a great boost from <2 % to 85–95 % through doping Sb 3+ . We further explore the effect of Sb 3+ dopants and the origin of bright emission by ultrafast transient absorption techniques. Furthermore, Sb‐doped 0D rubidium indium chloride perovskites show excellent stability. These findings not only provide a way to design a set of new high‐performance 0D lead‐free perovskites, but also reveal the relationship between structure and PL properties.
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Doping Lanthanide into Perovskite Nanocrystals: Highly Improved and Expanded Optical Properties
Gencai Pan, Xue Bai, Dongwen Yang et al. · Nano Letters · 2017 · 927 citations