journal article·2022-03-23

Polymer Electrolyte Dielectrics Enable Efficient Exciton-Polaron Quenching in Organic Semiconductors for Photostable Organic Transistors

Zhongwu Wang, Xiaosong Chen, Li Yu, Shujing Guo, Yongxu Hu, Yinan Huang, Shuguang Wang, Jiannan Qi, Cheng Han, Xiaonan Ma, Xiaotao Zhang, Huanli Dong, Wei Chen, Liqiang Li, Wenping Hu

ACS Applied Materials & Interfaces· Volume 14· Issue 11
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Abstract

The photoelectric response of organic field-effect transistors (OFETs) will cause severe photoelectric interference, which hinders the applications of OFETs in the light environment. It is highly challenging to relieve this problem because of the high photosensitivity of most organic semiconductors. Here, we propose an efficient “exciton-polaron quenching” strategy to suppress the photoelectric response and thus construct highly photostable OFETs by utilizing a polymer electrolyte dielectric─poly(acrylic acid) (PAA). This dielectric produces high-density polarons in organic semiconductors under a gate electric field that quench the photogenerated excitons with high efficiency (∼70%). As a result, the OFETs with PAA dielectric exhibit unprecedented photostability against strong light irradiation up to 214 mW/cm2, which far surpasses the reported values and solar irradiance value (∼138 mW/cm2). The strategy shows high universality in OFETs with different OSCs and electrolytes. As a demonstration, the photostable OFET can stably drive an organic light-emitting diode (OLED) under light irradiation. This work presents an efficient exciton modulation strategy in OSC and proves a high potential in practical applications.
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Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Perovskite Materials and Applications · Organic Light-Emitting Diodes Research

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

Affiliations

Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Institute of Molecular Aggregation Science, Tianjin University, Tianjin 300072, China

SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China

Institute of Molecular Plus, Tianjin University, Tianjin 300072, China

Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China

Department of Chemistry, National University of Singapore, Singapore 117543, Singapore

Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Fuzhou 350207, China

Funding

Natural Science Foundation of Tianjin City · Ministry of Science and Technology of the People's Republic of China · China Postdoctoral Science Foundation · National Natural Science Foundation of China · Fundamental Research Foundation of Shenzhen

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