Filter-Free Narrowband Photomultiplication-Type Planar Heterojunction Organic Photodetectors

被引:57
|
作者
Zhao, Zijin [1 ]
Xu, Chunyu [1 ]
Ma, Yao [1 ,2 ]
Ma, Xiaoling
Zhu, Xixiang [1 ]
Niu, Lianbin [3 ]
Shen, Liang [2 ]
Zhou, Zhengji [4 ]
Zhang, Fujun [1 ]
机构
[1] Beijing Jiaotong Univ, Key Lab Luminescence & Opt Informat, Minist Educ, Beijing 100044, Peoples R China
[2] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China
[3] Chongqing Normal Univ, Coll Phys & Elect Engn, Chongqing 401331, Peoples R China
[4] Henan Univ, Natl & Local Joint Engn Res Ctr High Efficiency Di, Kaifeng 475004, Peoples R China
基金
中国国家自然科学基金;
关键词
narrowband; organic photodetectors; photomultiplication-type; planar heterojunctions;
D O I
10.1002/adfm.202212149
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Filter-free narrowband photomultiplication-type planar heterojunction (PHJ) organic photodetectors (PM-PHOPDs) are first realized by employing a thick front donor layer and an ultrathin PC71BM layer. The thick front donor layer is employed as an optical field adjusting (OFA) layer. The sequentially coated PC71BM will diffuse slightly into OFA layer, which works as interfacial electron traps to capture photogenerated electrons for assisting hole tunneling injection. The P3HT/PC71BM-based PM-PHOPDs exhibit narrowband response with full-width of half-maximum of 32 nm and external quantum efficiency (EQE) of 1700% at 650 nm under -20 V bias. Due to the enhanced hole transport and reduced charge recombination in PHJ compared to those in bulk heterojunction (BHJ), the EQE of P3HT/PC71BM-based narrowband PM-PHOPDs is twice as P3HT:PC71BM BHJ-based narrowband PM-OPDs under the same bias. The response peak of PM-PHOPDs is adjusted from 650 to 695 or 745 nm by incorporating SMPV1 or DRCN5T in OFA layers due to the red-shifted absorption edge. The EQEs of 3600% at 695 nm and 870% at 745 nm are obtained for P3HT:SMPV1 and P3HT:DRCN5T-based PM-PHOPDs under -20 V bias, respectively. This work provides a smart strategy to achieve narrowband PM-OPDs by designing different OFA layers.
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页数:8
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