Oxide vacancy passivation through interface engineering of Tetraphenylethylene-Based Small-Molecule with sulfonate functional group for efficient organic photodetector
- Authors
- Jang, Woongsik; Rehman, Zia Ur; Haris, Muhammad; Cho, Jae Sang; Lim, Jihyun; Kim, Min Soo; Lee, Jong-Cheol; Lee, Hang Ken; Wang, Dong Hwan
- Issue Date
- Sep-2023
- Publisher
- Elsevier B.V.
- Keywords
- Organic photodetector; Oxygen vacancy; Passivation; Trap density; Zinc oxide
- Citation
- Chemical Engineering Journal, v.472
- Journal Title
- Chemical Engineering Journal
- Volume
- 472
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/67801
- DOI
- 10.1016/j.cej.2023.144847
- ISSN
- 1385-8947
1873-3212
- Abstract
- In this study, an alcohol-soluble tetraphenylethylene (TPE) unit-based luminogen with sulfonate chains is developed as a passivation layer for the oxygen vacancies of zinc oxide (ZnO) to obtain efficient organic photodetectors (OPDs). Given that the TPE-4 is designed to have four sulfonate chains, it can effectively fill the oxygen vacancy in ZnO, as confirmed by the results of X-ray photoelectron spectroscopy. The OPD device with the combination of ZnO and TPE-4 buffer layer exhibited decreased dark current and increased photocurrent owing to the prevention of trap-assisted recombination and shunt leakage caused by oxygen vacancies, as proved by electrical analysis. Moreover, the TPE-4 buffer layer exhibited excellent noise attenuation, leading to a signal-to-noise ratio of 50.35 dB and high device speeds of 0.77 μs and 137 kHz. The proposed TPE-based luminogen, designed to highlight the advantages of the widely used metal oxide layer while compensating for its limitations, is an effective strategy for realizing excellent photodetectors through chemical bonding. © 2023 Elsevier B.V.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of ICT Engineering > School of Integrative Engineering > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/67801)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.