Trap-Assisted Photomultiplication Polymer Photodetectors Obtaining an External Quantum Efficiency of 37 500%

Lingliang Li, Fujun Zhang*, Wenbin Wang, Qiaoshi An, Jian Wang, Qianqian Sun, Miao Zhang

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

139 引用 (Scopus)

摘要

A smart strategy is reported to obtain photomultiplication (PM) type polymer photodetectors (PPDs) based on poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) which are commonly used in polymer solar cells. The PPDs with 1 wt % PC61BM exhibit a champion EQE of 37,500% under 625 nm illumination with an intensity of 8.87 μW cm-2 at -19 V bias. The PM phenomenon of PPDs with rather low PC61BM doping ratios should be attributed to the enhanced hole tunneling injection assisted by trapped electrons in PC61BM near the Al cathode, which can be completely demonstrated from (i) turning distribution of electron traps by changing P3HT:PC61BM doping weight ratios from 200:1 to 1:1; (ii) adjusting interfacial barrier width by inserting LiF layer between the active layer and the Al cathode. (Graph Presented).

源语言英语
页(从-至)5890-5897
页数8
期刊ACS applied materials & interfaces
7
10
DOI
出版状态已出版 - 18 3月 2015
已对外发布

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