Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 38, Pages 16465-16469Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202006990
Keywords
blue light emission; crystalline hybrid materials; bimetallic halides; three-dimensional halide frameworks
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Funding
- National Nature Science Foundation of China [21671080]
- Project of Shandong Province Higher Educational Science and Technology Program [J18kz005]
- Young Innovative Talents Introduction & Cultivation Program for Colleges and Universities of Shandong Province: Innovative Research Team on Optoelectronic Functional Materials
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Considering the instability and low photoluminescence quantum yield (PLQY) of blue-emitting perovskites, it is still challenging and attractive to construct single crystalline hybrid lead halides with highly stable and efficient blue light emission. Herein, by rationally introducingd(10)transition metal into single lead halide as new structural building unit and optical emitting center, we prepared a bimetallic halide of [(NH4)(2)]CuPbBr(5)with new type of three-dimensional (3D) anionic framework. [(NH4)(2)]CuPbBr(5)exhibits strong band-edge blue emission (441 nm) with a high PLQY of 32 % upon excitation with UV light. Detailed photophysical studies indicate [(NH4)(2)]CuPbBr(5)also displays broadband red light emissions derived from self-trapped states. Furthermore, the 3D framework features high structural and optical stabilities at extreme environments during at least three years. To our best knowledge, this work represents the first 3D non-perovskite bimetallic halide with highly efficient and stable blue light emission.
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