journal article·2024-03-04

Donor–Acceptor Conjugated Polymers for Single-Component Near-Infrared II Organic Phototransistors with Ultrahigh Photoresponsivity

Ying Huang, Yunqi Xu, Kun Liu, Yubin Fu, Antonio Gaetano Ricciardulli, Faxing Wang, Sheng Yang, Ji Ma, Mengmeng Li, Zhengfang Qian, Renheng Wang, Panpan Zhang

ACS Materials Letters· Volume 6· Issue 3
Publisher page

Abstract

The design of donor–acceptor (D–A) conjugated polymers with narrow bandgaps remains a big challenge for achieving high-performance near-infrared (NIR) phototransistors. Herein, we report a novel D–A conjugated polymer (denoted as TBOPV-DT) based on a thiophene-fused benzodifurandione-based oligo( p -phenylenevinylene) (TBOPV) acceptor in conjugation with a 3,3′-dialkoxy-2,2′-dithiophene (DT) donor. Benefiting from the alkoxylation of the donor units, the TBOPV-DT conjugated polymer exhibits broad second NIR absorption and a narrow bandgap of 0.65 eV. When being used as the channel material in field-effect transistors, the TBOPV-DT conjugated polymer shows p-type semiconducting behavior with a hole mobility of 0.16 cm 2 V –1 s –1 . Besides, the resulting single-component polymer phototransistor displays ultrahigh sensitivity to a broad range of wavelengths (850–1450 nm) and a record-high photoresponsivity of 1.9 × 10 5 A W –1 . Moreover, the fast rise and decay response times of 53 and 317 ms, respectively, are comparable to those of state-of-the-art two-dimensional materials. This work sheds light on designing new narrow-bandgap D–A conjugated polymers with molecular precision and paves the way for the development of future high-performance optoelectronics.
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Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Perovskite Materials and Applications · Conducting polymers and applications

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

Affiliations

Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, 518060 Shenzhen, China

State Key Lab of Fabrication Technologies for Integrated Circuits, Institute of Microelectronics, Chinese Academy of Sciences, 100029 Beijing, China

University of Chinese Academy of Sciences, 100049 Beijing, China

Center for Advancing Electronics Dresden (cfaed) & Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Mommsenstrasse 4, 01069 Dresden, Germany

University of Strasbourg, CNRS, ISIS UMR 7006, 67000 Strasbourg, France

Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 200240 Shanghai, China

State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, 430074 Wuhan, China

Funding

Basic and Applied Basic Research Foundation of Guangdong Province · Shenzhen Science and Technology Innovation Program · National Natural Science Foundation of China · Shenzhen University · Shenzhen Medical Research Fund

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