Enhanced Gain in Organic Photodetectors Using the Polymer with Singlet Open-Shell Ground State

Dang, Qianxi1; Hu, Lanzhen2; Yuan, Likai2; Miao, Xincheng1; Huang, Arui2; Su, Junsheng1; Wang, Jiaqiang3; Zhou, Yongheng4; Chen, Xiaolong4; Li, Qianqian2; Li, Zhen2,3; Deng, Xianyu1

2023-11-01

10.1002/anie.202312538

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   Impact Factor & Quartile

1433-7851

1521-3773

["Photodetectors are critical components in intelligent optoelectronic systems, and photomultiplication-capable devices are essential for detecting weak optical signals. Despite significant advances, developing photomultiplication-type organic photodetectors with high gain and low noise current simultaneously remains challenging. In this work, a new conjugated polymer PDN with singlet open-shell ground state is introduced in active layers for electron capture, and the corresponding PDN-based photodetectors exhibited an enhanced photoelectric gain and decreased dark current density at a low forward bias. At 1.5 V, the PDN-based ternary photodetector has the external quantum efficiency (EQE) up to 2552.3 % and the specific detectivity of 1.4x1014 Jones at 710 nm calculated by the measured noise current, with the gain 22 times higher than that of the control group. This study provides an approach for exploiting polymers with singlet open-shell ground state to enhance the gain of organic photodetectors.","To address the challenge of achieving high photoresponse and low dark or noise current with a fast response speed under a low bias in polymer photodetectors, this study demonstrates the potential of incorporating the polymer with singlet open-shell ground state in the active layer to enhance the performance of organic photodetectors.+image"]

Open-Shell Ground State Photodetectors Photoelectric Gain Photomultiplication Polymers

SCI

English

NI Journal Papers

Others

The authors gratefully acknowledge the financial support from National Natural Science Foundation of China (Grant Nos. 52273171, 22235006, ZX20190282 and Nos. 21875055), Natural Science Foundation of Guangdong Province of China (Grant Nos. 2019 A1515110447["52273171","22235006","ZX20190282","21875055"] ; National Natural Science Foundation of China[2019 A1515110447] ; Natural Science Foundation of Guangdong Province of China[GXWD20201230155427003]

Chemistry

Chemistry, Multidisciplinary

WOS:001091886300001

WILEY-V C H VERLAG GMBH

CHEMISTRY

Web of Science

1.Harbin Inst Technol, Sch Mat Sci & Engn, Shenzhen 518055, Peoples R China
2.Wuhan Univ, Dept Chem, Hubei Key Lab Organ & Polymer Optoelect Mat, Wuhan 430072, Peoples R China
3.Tianjin Univ, Inst Mol Aggregat Sci, Tianjin 300072, Peoples R China
4.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China

Dang, Qianxi,Hu, Lanzhen,Yuan, Likai,et al. Enhanced Gain in Organic Photodetectors Using the Polymer with Singlet Open-Shell Ground State[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,2023.

Dang, Qianxi.,Hu, Lanzhen.,Yuan, Likai.,Miao, Xincheng.,Huang, Arui.,...&Deng, Xianyu.(2023).Enhanced Gain in Organic Photodetectors Using the Polymer with Singlet Open-Shell Ground State.ANGEWANDTE CHEMIE-INTERNATIONAL EDITION.

Dang, Qianxi,et al."Enhanced Gain in Organic Photodetectors Using the Polymer with Singlet Open-Shell Ground State".ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2023).