Silicon‐Rivalling Large‐Area Flexible Broadband Organic Photodetectors
Organic photodetectors (OPDs) have demonstrated significant advantages as a promising next-generation photodetection technology, especially for application in flexible and curved image sensing. However, there is still a big gap in device performance between OPDs and commercial silicon photodiodes, which hinders their practical application. Herein, using a novel near-infrared electron acceptor featuring acceptor-donor-acceptor molecular skeleton and electron-withdrawing cyano-substituted terminal groups, the study reports an OPD that can fully compete with the commercial silicon photodiodes. Benefiting from the strong electron push-pull effect and large molecular dipole moment, the OPD exhibits a broad detection range from 300 to 1100 nm and a peak external quantum efficiency of 70% at 940 nm. Moreover, owing to the reduced energetic disorder and trap density, the OPD exhibits a picoampere-level dark current density (1.30 × 10<sup>-10</sup> A cm<sup>-2</sup>) at -0.1 V bias. Such high responsivity and low dark current density endow the OPD with a detectivity surpassing 10<sup>13</sup> Jones across the whole spectral range. More importantly, this superior photodetection performance can be maintained in large-area flexible device (80 mm<sup>2</sup>). These results demonstrate the huge potential of OPDs in addressing the limitations of silicon photodiodes for application in flexible and wearable electronics.
Authors
- Chunhui Duan (ORCID: https://orcid.org/0000-0002-6521-2149)
- Zheng Tang (ORCID: https://orcid.org/0000-0003-0036-2362)
- Jiaying Wu (ORCID: https://orcid.org/0000-0001-9674-2903)
- Xiye Yang (ORCID: https://orcid.org/0000-0001-8273-9535)
- Yanjun Fang (ORCID: https://orcid.org/0000-0003-4401-2313)
- Zaifei Ma (ORCID: https://orcid.org/0000-0002-3100-1570)
- Yeye Wang
- Yong Cao (ORCID: https://orcid.org/0000-0002-8799-3812)
- Kangzhe Liu
- Xia Zhou (ORCID: https://orcid.org/0000-0002-4070-4446)
- Mingqun Yang
- Fei Huang (ORCID: https://orcid.org/0000-0003-1700-8271)
- Bingyan Yin
- Yuyang Li (ORCID: https://orcid.org/0000-0002-1399-9381)
- Yao Li (ORCID: https://orcid.org/0000-0001-7666-8777)
- Hongxiang Li (ORCID: https://orcid.org/0000-0002-5444-2168)
- Feixiang Zhao
- Jiayuan Zhu (ORCID: https://orcid.org/0000-0002-3641-4489)
- Yunhao Cao (ORCID: https://orcid.org/0000-0002-8613-4864)
- Xiaoxin Tan
Institutions
- Ningbo University of Technology (CN)
- Donghua University (CN)
- Sichuan University (CN)
- Guangzhou University (CN)
- Guangzhou Institute of Advanced Technology (CN)
- Zhejiang University (CN)
- University of Hong Kong (HK)
- South China University of Technology (CN)
Publication Details
- Journal
- Advanced Materials
- Published
- 2025-11-20
- DOI
- https://doi.org/10.1002/adma.202516087
- Citations
- 5
- Primary Topic
- Organic Electronics and Photovoltaics
- Type
- article
- Field-Weighted Citation Impact
- 3.65
Funders
- Salt Science Research Foundation
- National Natural Science Foundation of China
- China Postdoctoral Science Foundation
- Guangdong Science and Technology Department
- Department of Education of Zhejiang Province
- Guangzhou Municipal Science and Technology Bureau
- Natural Science Foundation of Ningbo
- National Key Research and Development Program of China
- Basic and Applied Basic Research Foundation of Guangdong Province