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Multifunctional Optoelectronic Device Based on an Asymmetric Active Layer Structure
Author(s) -
Ren Beitao,
Yuen Gancheong,
Deng Sunbin,
Jiang Le,
Zhou Dingjian,
Gu Leilei,
Xu Ping,
Zhang Meng,
Fan Zhiyong,
Yueng Fion Sze Yan,
Chen Rongsheng,
Kwok HoiSing,
Li Guijun
Publication year - 2019
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201807894
Subject(s) - materials science , optoelectronics , active layer , electroluminescence , heterojunction , light emitting diode , diode , exciton , chalcogenide , charge carrier , photoactive layer , photodetector , layer (electronics) , nanotechnology , polymer solar cell , solar cell , physics , quantum mechanics , thin film transistor
A single device with a variety of capabilities is highly attractive for the increasing demands of complex and multifunctional optoelectronics. A hybrid heterojunction formed between CsPbBr 3 halide perovskite and chalcogenide quantum dots is demonstrated. The heterojunction served as an asymmetric active layer allows not only charge separation/exciton dissociation in a benign process, but also carrier injection/recombination with the suppression of bulk and interfacial nonradiative recombination. An individual device incorporating such a heterojunction is therefore implemented with an integration of proof‐of‐concept functions, including a voltage controllable multicolor light‐emitting diode, an exceptionally high photovoltage energy‐harvesting device, and an ultrafast photosensitive detector. The figures of merit of the light‐emitting diode remarkably surpass those of the corresponding single‐active‐layer device, particularly in terms of its bright electroluminescence and superior long‐term stability. The asymmetric active layer concept provides a feasible route to design efficient multifunctional and monofunctional devices in the future.