Efficient Luminescent Halide Quadruple‐Perovskite Nanocrystals via Trap‐Engineering for Highly Sensitive Photodetectors
Source abstract
Abstract
Abstract The colloidal synthesis of a new type of lead‐free halide quadruple‐perovskite nanocrystals (NCs) is reported. The photoluminescence quantum yield and charge‐carrier lifetime of quadruple‐perovskite NCs can be enhanced by 96 and 77‐fold, respectively, via metal alloying. Study of charge‐carrier dynamics provide solid demonstrate that the PL enhancement is due to the elimination of ultrafast (1.4 ps) charge‐carrier trapping processes in the alloyed NCs. Thanks to the high crystallinity, low trap‐state density, and long carrier lifetime (193.4 μs), the alloyed quadruple‐perovskite NCs can serve as the active material for high‐performance photodetectors, which exhibit high responsivity (up to 0.98 × 104 A W−1) and an external quantum efficiency (EQE) of 3 × 106%. These numbers are among the highest for perovskite‐NC‐based photodetectors.
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Research context
OpenAlex topics: Perovskite Materials and Applications · Solid-state spectroscopy and crystallography · Quantum Dots Synthesis And Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Molecular Sciences and Engineering Shandong University Qingdao 266237 P. R. China
State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical Physics Chinese Academy of Science Dalian 116023 P. R. China
University of the Chinese Academy of Sciences Beijing 100039 P. R. China
Dalian National Laboratory for Clean Energy (DNL) Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
Department of Applied Physics Nanjing University of Science and Technology Nanjing 210094 P. R. China
Funding
National Basic Research Program of China · National Natural Science Foundation of China
References (44)
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