Highly luminescent and stable CsPbBr3 perovskite nanocrystals coated with polyethersulfone for white light‐emitting diode applications
Hao Zhang,
Xuemei Wang,
Ning Ai
et al.
Abstract:Simultaneously improving the stability and photoluminescence quantum yield (PLQY) of all inorganic perovskite nanocrystals (NCs) is crucial for their practical utilization in various optoelectronic devices. Here, CsPbBr3 NCs coated with polyethersulfone (PES) were prepared via an in‐situ co‐precipitation method. The sulfone groups in PES bind to undercoordinated lead ion (Pb2+) on the CsPbBr3 NCs, resulting in significant reduction of surface defects, thus enhancing the PLQY from 74.2% to 88.3%. Meanwhile, the… Show more
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