DataVXAdvanced Optical MaterialsPaper
journal article·2025-10

Organic Thin Film Transistor Material Based Photomultiplication Type Organic Photodetectors via Balancing Hole Tunneling Injection and Transport

Hongfei Qu, Zuliang Zhuo, Xingchao Zhao, Shuai Zhang, Xiaoling Ma, Ye Zou, Kaixuan Yang, Fujun Zhang

Advanced Optical Materials· Volume 13· Issue 29
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Source abstract

Abstract

Abstract Photomultiplication type organic photodetectors (PM‐OPDs) are prepared with organic thin film transistor (OTFT) material PC12TV12T as donor and PC 71 BM as acceptor, the optimal weight ratio of PC12TV12T to PC 71 BM is about 100:7. The external quantum efficiency (EQE) of optimal PM‐OPDs is 9200% at 370 nm under ‐8 V bias, resulting from the hole tunneling injection induced by trapped electrons in PC 71 BM surrounded by PC12TV12T near Al electrode. P3HT is deliberately selected as the third component due to its high absorption coefficient and the lowest unoccupied molecular orbital. The optimal ternary PM‐OPDs exhibit the EQE and specific detectivity ( D* ) of 12600% and 7.63 × 10 11 Jones at 370 nm under ‐8 V bias. Meanwhile, the signal‐to‐noise (SNR) of PM‐OPDs can be increases over twenty times by employing P3HT as a third component, benefiting from the markedly decreased dark current density. This work indicates that PC12TV12T used in OTFT should be an excellent host material for achieving PM‐OPDs, benefiting from its high mobility and appropriate energy level.
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Research context

Electronic materials

OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Organic Light-Emitting Diodes Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Advanced Organic Materials and Devices Laboratory School of Physical Science and Engineering Beijing Jiaotong University Beijing 100044 P. R. China

Qingdao SRI Intellectual Technology Co. LTD. Qingdao Shandong 266500 P. R. China

Beijing National Laboratory for Molecular Sciences Organic Solids Laboratory Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China

School of Automation and Intelligence Beijing Jiaotong University Beijing 100044 P. R. China

Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering University of Macau Avenida da Universidade Taipa Macau 999078 P. R. China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Hebei Province · Natural Science Foundation of Beijing Municipality

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