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题名: Achieving EQE of 16,700% in P3HT: PC71BM based photodetectors by trap-assisted photomultiplication
作者: Li, Lingliang1;  Zhang, Fujun1;  Wang, Jian1;  An, Qiaoshi1;  Sun, Qianqian1;  Wang, Wenbin1;  Zhang, Jian2;  Teng, Feng1
刊名: SCIENTIFIC REPORTS
发表日期: 2015-03-17
DOI: 10.1038/srep09181
卷: 5
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Multidisciplinary Sciences
研究领域[WOS]: Science & Technology - Other Topics
英文摘要: We report a trap-assisted photomultiplication (PM) phenomenon in solution-processed polymer photodetectors (PPDs) based on P3H : PC71BM as the active layer, the maximum EQE of 16,700% is obtained for the PPDs with PC71BM doping weight ratio of 1%. The PM phenomenon is attributed to the enhanced hole tunneling injection assisted by trapped electrons in PC71BM near Al cathode, which can be demonstrated by the transient photocurrent curves and EQE spectra of PPDs with different PC71BM doping ratios. The positive effect of trapped electrons in PC71BM near Al cathode on the hole tunneling injection is further confirmed by the simulated optical field and exciton generation rate distributions in the active layer and the EQE spectra of PPDs with Al(1)/P3HT : PC71BM(100 : 1)/Al(2) device structure under forward and reverse biases. This discovery may open a new road for organic materials to be used in highly sensitive photodetectors while preserving the advantages of organic materials.
关键词[WOS]: POLYMER SOLAR-CELLS ;  PHOTOCURRENT MULTIPLICATION ;  BULK-HETEROJUNCTION ;  NANOSCALE MORPHOLOGY ;  BUFFER LAYER ;  PERFORMANCE ;  TEMPERATURE ;  FULLERENE ;  GAIN
语种: 英语
WOS记录号: WOS:000351229000010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146054
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Beijing Jiaotong Univ, Minist Educ, Key Lab Luminescence & Opt Informat, Beijing 100044, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Li, Lingliang,Zhang, Fujun,Wang, Jian,et al. Achieving EQE of 16,700% in P3HT: PC71BM based photodetectors by trap-assisted photomultiplication[J]. SCIENTIFIC REPORTS,2015,5.
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