Mahmoud, Alaa Y. and Sulaiman, Khaulah and Bahabry, Rabab R. and Alzahrani, Hanan (2021) Effect of donor on the performance of self-powered UV photodiodes based on solution-processed TPD:Alq3 and NPD:Alq3 active layers. Optik, 244. ISSN 0030-4026, DOI https://doi.org/10.1016/j.ijleo.2021.167538.
Full text not available from this repository.Abstract
In this work, the impact of donor material on the optical and photodiode response is revealed by comparing the performance of self-powered photodiodes based on D:Alq3 (D=TPD or NPD) composite. The active layers were fabricated from solution-processed composites using the wellknown spin coating technique, followed by their optical and electrical characterizations. The photodiodes were utilized for the UV light detection in a self-powered mode, in which no external power is required, but it is generated through the photovoltaic effect. Results showed that the NPD film has provided a broader and more intensive optical absorption towards the UV light compared to that of TPD. Also, photoluminescence quenching in the NPD:Alq3 composite was found to highly outperform that of the TPD:Alq3. These were ascribed to the effect of extra pi conjugated bonds present in the NPD, which are originated from the aromatic rings. Consequently, the NPD:Alq3 photodiodes presented a respective sensitivity, responsivity and detectivity of 1.3x105, 1.07 mA/W and 5.25x1011 Jones at 0 V. Moreover, the response (0.34 s) and recovery time (0.28 s) of these devices were found to be smaller compared to those reported in literature.
| Item Type: | Article |
|---|---|
| Funders: | UNSPECIFIED |
| Uncontrolled Keywords: | Photodiode; Self-powered; Sensitivity; Detectivity |
| Subjects: | Q Science > QC Physics |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 28 Feb 2022 06:29 |
| Last Modified: | 28 Feb 2022 06:29 |
| URI: | http://eprints.um.edu.my/id/eprint/26415 |
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