Effect of Cyano Substitution on Non‐Fullerene Acceptor for Near‐Infrared Organic Photodetectors above 1000 nm (Adv. Funct. Mater. 8/2023). (16th February 2023)

• Record Type: Journal Article
• Authors: Ha, Jong‐Woon; Eun, Hyeong Ju; Park, Byoungwook; Ahn, Hyungju; Hwang, Dong Ryeol; Shim, Yeong Seok; Heo, Junseok; Lee, Changjin; Yoon, Sung Cheol; Kim, Jong H.; Ko, Seo‐Jin
• Is Part Of: Advanced functional materials. Volume 33:Number 8(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-02-16
• Subjects: CN substitutions -- low dark current densities -- near‐infrared -- non‐fullerene acceptors -- ultra narrow bandgaps; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202370042
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract : Non‐Fullerene Acceptors In article number 2211486, Seo‐Jin Ko, Jong H. Kim, Sung Cheol Yoon, and co‐workers present a new CN‐substituted non‐fullerene acceptor COTCN2, which exhibits a deeper highest occupied molecular orbital energy level and a narrower optical bandgap (< 1.10 eV). As a result, the near‐infrared organic photodetector (NIR OPD) based on PTB7‐Th:COTCN2 provides high non‐detectability beyond 1000 nm with dark hole injection well suppressed due to the larger charge injection barrier. Additionally, as a practical implementation of NIR OPD, photoplethysmography sensors are successfully demonstrated.