Roslan, Suraya Annissa and Md Sabri, Amirul Ashraf and Roslan, Nur Adilah and Bawazeer, Tahani M. and Alsoufi, Mohammad S. and Aziz, Fakhra and Supangat, Azzuliani (2024) Equal proportion of donor/acceptor active layer for reduced dark current in visible organic photodiode. Optical Materials, 147. ISSN 0925-3467, DOI https://doi.org/10.1016/j.optmat.2023.114781.
Full text not available from this repository.Abstract
The present study investigates a visible organic photodiode with low dark current of 0.002 mA/cm2. The active layer is a bulk heterojunction (BHJ) binary blended film composed of PolyN-9′-heptadecanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole) (PCDTBT) as a donor material along with (6,6)-Phenyl C71 butyric acid methyl ester (PC71BM) as an acceptor material. The device was fabricated using a facile spin coating technique with the structure of ITO/PEDOT:PSS/PCDTBT:PC71BM/Al. The composition of PCDTBT and PC71BM has significantly improved the absorption of the UV–visible spectrum, especially between 300 and 650 nm. The optimized device of the blended film (1:1 blend ratio) showed a good photoresponsivity of 114 mA/W, with a fast response-recovery time of 733 ms and 597 ms, respectively. It is found that the specific detectivity obtained is 1.79×109 Jones and external quantum efficiency (EQE) is 29.13 %. The results manifested the optimized device can be employed in the fabrication of a cost-effective and highly sensitive visible organic photodiode. © 2023 Elsevier B.V.
| Item Type: | Article |
|---|---|
| Funders: | Universiti Malaya [Grant no. MOSTI004-2023SRF, RMF1249-202] |
| Uncontrolled Keywords: | PC71BM; PCDTBT; Photodiode; Photoresponsivity; Spin-coating |
| Subjects: | Q Science > QC Physics |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 20 Mar 2024 00:46 |
| Last Modified: | 20 Mar 2024 00:46 |
| URI: | http://eprints.um.edu.my/id/eprint/45044 |
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