Effect of illumination intensity on a self-powered UV photodiode based on solution-processed NPD:Alq3 composite system

Alzahrani, Hanan and Sulaiman, Khaulah and Muhammadsharif, Fahmi F. and Abdullah, Shahino Mah and Mahmoud, Alaa Y. and Bahabry, Rabab R. and Ab Sani, Siti Fairus (2021) Effect of illumination intensity on a self-powered UV photodiode based on solution-processed NPD:Alq3 composite system. Journal of Materials Science-Materials in Electronics, 32 (11). pp. 14801-14812. ISSN 0957-4522, DOI https://doi.org/10.1007/s10854-021-06034-x.

Full text not available from this repository.


In this work, the impact of UV illumination intensity on a self-powered photodiode based on organic NPD:Alq3 composite is comprehensively investigated. Solution-processed spin coating was used to fabricate the active layers followed by electrode deposition to form devices with architecture ITO/PEDOT:PSS/NPD:Alq3/LiF/Al. UV-Vis and PL spectrometers were used to investigate the properties of the active layer, while a Keithley source meter was utilized to record the current-voltage response of the photodiodes. Results showed that the self-powered photocurrent was linearly increased (with logarithmic gradient similar to 0.5, confirming the presence of a bimolecular recombination), while the photovoltage was logarithmically increased with illumination intensity. A sensitivity of 1.3 x 10(5) was achieved with responsivity and detectivity of 5.39 mA/W and 5.25 x 10(11) Jones, respectively at 40 mW/cm(2) illumination. The photodiode sensitivity was found to be linearly increased, while the responsivity and detectivity were exponentially decreased with illumination intensity. The variation of bulk resistance of the photodiode followed an exponential and linear relation under low and high illumination intensities, respectively.

Item Type: Article
Funders: University of Jeddah, Saudi Arabia, Islamic Development Bank under IDB Merit Scholarship Program
Uncontrolled Keywords: Organic Solar-Cells; Ppolymer Photodetectors; Spectral Response; Band-Gap; Nanocomposites; Temperature; Films; Nanostructures; Photocatalyst; Performance;
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science > Department of Physics
Depositing User: Ms Zaharah Ramly
Date Deposited: 28 Mar 2022 07:59
Last Modified: 28 Mar 2022 07:59
URI: http://eprints.um.edu.my/id/eprint/28603

Actions (login required)

View Item View Item