High-Sensitivity Organic Photodetector Based on Surface-Concentrated Nonfused Ring Electron Acceptor

Kim, Min Soo1; Luo, Dou2; Jang, Woongsik1; Kim, Byung Gi1; Shan, Chengwei2; Kyaw, Aung Ko Ko2; Wang, Dong Hwan1

2022-12-01

10.1002/adom.202202525

Advanced Optical Materials   Impact Factor & Quartile

2195-1071

Organic photodetectors (OPDs) with high photodetection abilities are essential requirements for ubiquitous light-sensing devices. This work presents a simple nonfused ring electron acceptor (NFREA) named "TPDC-4F" having optical bandgap of 1.42 eV, being designed as an efficient OPD via thickness control and additive engineering of the photosensitive layer. The optimized photosensitive layer composed of poly[(2,6-(4,8-bis(5-(2-ethylhexyl-3-fluoro)thiophen-2-yl)-benzo[1,2-b:4,5-b ']dithiophene))-alt-(5,5-(1 ',3 '-di-2-thienyl-5 ',7 '-bis(2-ethylhexyl)benzo[1 ',2 '-c:4 ',5 '-c ']dithiophene-4,8-dione))] (PM6) donors and TPDC-4F acceptors shows a dramatically suppressed dark current of 3.55 x 10(-9) A cm(-2). Moreover, it shows improved photoelectric properties and fast charge transfer even though the photosensitive layer thickness is as large as 330 nm. OPDs based on the 330-nm-thick PM6:TPDC-4F with 1-chloronaphthalene additive exhibit a high specific detectivity (D*) of 1.27 x 10(13) cm Hz(1/2) W-1 at 800 nm and a linear dynamic range of 122 dB under a bias of -0.1 V. The device also exhibits fast rise and fall times of 6.81 and 5.41 mu s, respectively. This work demonstrates that the NFREA-based OPDs offer competitive device performance compared to those based on fused-ring electron acceptors.

1-chloronaphthalene nonfused ring electron acceptors organic photodetectors phase separation TPDC-4F

SCI

English

Corresponding

Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT (MSIT)[2019R1A2C1087653] ; Technology Innovation Programs["20017439","20021915"] ; Shenzhen Science, Technology and Innovation Commission[JCYJ20220530113014033] ; Department of Education of Guangdong Province University Innovation Foundation[2021KTSCX107]

Materials Science ; Optics

Materials Science, Multidisciplinary ; Optics

WOS:000895871600001

WILEY-V C H VERLAG GMBH

Web of Science

1.Chung Ang Univ, Sch Integrat Engn, 84 Heukseok Ro, Seoul 06974, South Korea
2.Southern Univ Sci & Technol, Dept Elect & Elect Engn, 1088 Xueyuan Blvd, Shenzhen 518055, Guangdong, Peoples R China

Kim, Min Soo,Luo, Dou,Jang, Woongsik,et al. High-Sensitivity Organic Photodetector Based on Surface-Concentrated Nonfused Ring Electron Acceptor[J]. Advanced Optical Materials,2022.

Kim, Min Soo.,Luo, Dou.,Jang, Woongsik.,Kim, Byung Gi.,Shan, Chengwei.,...&Wang, Dong Hwan.(2022).High-Sensitivity Organic Photodetector Based on Surface-Concentrated Nonfused Ring Electron Acceptor.Advanced Optical Materials.

Kim, Min Soo,et al."High-Sensitivity Organic Photodetector Based on Surface-Concentrated Nonfused Ring Electron Acceptor".Advanced Optical Materials (2022).