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Title: Trap-assisted large gain in Cu{sub 2}O/C{sub 60} hybrid ultraviolet/visible photodetectors

Abstract

Photomultiplication-type ultraviolet (UV)/visible photodetectors (PDs) are demonstrated in an electrodeposited Cu{sub 2}O/C{sub 60} hybrid structure. These simple organic/inorganic hybrid PDs exhibit external quantum efficiencies (EQEs) of 1.1 × 10{sup 4}% under illumination of 365 nm UV light at −3 V, indicating a large gain of photocurrent for these devices. Such an EQE is one of the highest values among the reported organic/inorganic hybrid PDs at the same voltage. Cu{sub 2}O and C{sub 60} are found to play different roles in realizing the photomultiplication. Copper vacancies are proposed as the defects in the electrodeposited Cu{sub 2}O layers, which can trap photogenerated holes. Such trapped holes will trigger the injection of multiple electrons and hence result in the photocurrent gain of the devices while C{sub 60} primarily acts as a light absorption media to provide free holes.

Authors:
; ;  [1];  [2]; ; ; ; ;  [1]
  1. The State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022 (China)
  2. State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033 (China)
Publication Date:
OSTI Identifier:
22591619
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 108; Journal Issue: 16; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COPPER; COPPER OXIDES; ELECTRIC POTENTIAL; ELECTRODEPOSITION; FULLERENES; GAIN; HYBRIDIZATION; LAYERS; PHOTOCURRENTS; PHOTODETECTORS; QUANTUM EFFICIENCY; TRAPPING; ULTRAVIOLET RADIATION; VACANCIES

Citation Formats

Liu, Lan, Xi, Qiaoyue, Gao, Ge, University of Chinese Academy of Sciences, Beijing 100049, Su, Zisheng, Yang, Wei, Zhao, Yongxia, Wu, Cunqi, Wang, Lidan, and Xu, Jingwei. Trap-assisted large gain in Cu{sub 2}O/C{sub 60} hybrid ultraviolet/visible photodetectors. United States: N. p., 2016. Web. doi:10.1063/1.4947581.
Liu, Lan, Xi, Qiaoyue, Gao, Ge, University of Chinese Academy of Sciences, Beijing 100049, Su, Zisheng, Yang, Wei, Zhao, Yongxia, Wu, Cunqi, Wang, Lidan, & Xu, Jingwei. Trap-assisted large gain in Cu{sub 2}O/C{sub 60} hybrid ultraviolet/visible photodetectors. United States. doi:10.1063/1.4947581.
Liu, Lan, Xi, Qiaoyue, Gao, Ge, University of Chinese Academy of Sciences, Beijing 100049, Su, Zisheng, Yang, Wei, Zhao, Yongxia, Wu, Cunqi, Wang, Lidan, and Xu, Jingwei. Mon . "Trap-assisted large gain in Cu{sub 2}O/C{sub 60} hybrid ultraviolet/visible photodetectors". United States. doi:10.1063/1.4947581.
@article{osti_22591619,
title = {Trap-assisted large gain in Cu{sub 2}O/C{sub 60} hybrid ultraviolet/visible photodetectors},
author = {Liu, Lan and Xi, Qiaoyue and Gao, Ge and University of Chinese Academy of Sciences, Beijing 100049 and Su, Zisheng and Yang, Wei and Zhao, Yongxia and Wu, Cunqi and Wang, Lidan and Xu, Jingwei},
abstractNote = {Photomultiplication-type ultraviolet (UV)/visible photodetectors (PDs) are demonstrated in an electrodeposited Cu{sub 2}O/C{sub 60} hybrid structure. These simple organic/inorganic hybrid PDs exhibit external quantum efficiencies (EQEs) of 1.1 × 10{sup 4}% under illumination of 365 nm UV light at −3 V, indicating a large gain of photocurrent for these devices. Such an EQE is one of the highest values among the reported organic/inorganic hybrid PDs at the same voltage. Cu{sub 2}O and C{sub 60} are found to play different roles in realizing the photomultiplication. Copper vacancies are proposed as the defects in the electrodeposited Cu{sub 2}O layers, which can trap photogenerated holes. Such trapped holes will trigger the injection of multiple electrons and hence result in the photocurrent gain of the devices while C{sub 60} primarily acts as a light absorption media to provide free holes.},
doi = {10.1063/1.4947581},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 16,
volume = 108,
place = {United States},
year = {2016},
month = {4}
}