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Author Liu, Lan ♦ Xi, Qiaoyue ♦ Gao, Ge ♦ Su, Zisheng ♦ Yang, Wei ♦ Zhao, Yongxia ♦ Wu, Cunqi ♦ Wang, Lidan ♦ Xu, Jingwei
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ COPPER ♦ COPPER OXIDES ♦ ELECTRIC POTENTIAL ♦ ELECTRODEPOSITION ♦ FULLERENES ♦ GAIN ♦ HYBRIDIZATION ♦ LAYERS ♦ PHOTOCURRENTS ♦ PHOTODETECTORS ♦ QUANTUM EFFICIENCY ♦ TRAPPING ♦ ULTRAVIOLET RADIATION ♦ VACANCIES
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.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-04-18
Publisher Place United States
Journal Applied Physics Letters
Volume Number 108
Issue Number 16


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