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Modulating the optical and electrical properties of MAPbBr3 single crystals via voltage regulation engineering and application in memristors.
Xing, Jun; Zhao, Chen; Zou, Yuting; Kong, Wenchi; Yu, Zhi; Shan, Yuwei; Dong, Qingfeng; Zhou, Ding; Yu, Weili; Guo, Chunlei.
Afiliación
  • Xing J; The Guo Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 130033 Changchun, China.
  • Zhao C; University of Chinese Academy of Sciences, 100049 Beijing, China.
  • Zou Y; The Guo Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 130033 Changchun, China.
  • Kong W; University of Chinese Academy of Sciences, 100049 Beijing, China.
  • Yu Z; The Guo Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 130033 Changchun, China.
  • Shan Y; University of Chinese Academy of Sciences, 100049 Beijing, China.
  • Dong Q; The Guo Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 130033 Changchun, China.
  • Zhou D; University of Chinese Academy of Sciences, 100049 Beijing, China.
  • Yu W; The Guo Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 130033 Changchun, China.
  • Guo C; University of Chinese Academy of Sciences, 100049 Beijing, China.
Light Sci Appl ; 9: 111, 2020.
Article en En | MEDLINE | ID: mdl-32637078
ABSTRACT
Defect density is one of the most significant characteristics of perovskite single crystals (PSCs) that determines their optical and electrical properties, but few strategies are available to tune this property. Here, we demonstrate that voltage regulation is an efficient method to tune defect density, as well as the optical and electrical properties of PSCs. A three-step carrier transport model of MAPbBr3 PSCs is proposed to explore the defect regulation mechanism and carrier transport dynamics via an applied bias. Dynamic and steady-state photoluminescence measurements subsequently show that the surface defect density, average carrier lifetime, and photoluminescence intensity can be efficiently tuned by the applied bias. In particular, when the regulation voltage is 20 V (electrical poling intensity is 0.167 V µm-1), the surface defect density of MAPbBr3 PSCs is reduced by 24.27%, the carrier lifetime is prolonged by 32.04%, and the PL intensity is increased by 112.96%. Furthermore, a voltage-regulated MAPbBr3 PSC memristor device shows an adjustable multiresistance, weak ion migration effect and greatly enhanced device stability. Voltage regulation is a promising engineering technique for developing advanced perovskite optoelectronic devices.
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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Light Sci Appl Año: 2020 Tipo del documento: Article País de afiliación: China

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Light Sci Appl Año: 2020 Tipo del documento: Article País de afiliación: China