Rashid, Haroon and Sapiee, Nurfarhana Mohamad and Arsad, Norhana and Ahmad, Harith and Bakar, Ahmad Ashrif A. and Reaz, Mamun Ibne (2021) Fabrication of a carbon nanotube/tungsten disulfide visible spectrum photodetector. Applied Optics, 60 (10). pp. 2839-2845. ISSN 1559-128X, DOI https://doi.org/10.1364/AO.417230.
Full text not available from this repository.Abstract
Two-dimensional-material-based photodetectors are gaining prominence in optoelectronic applications, but there are certain factors to consider with bulk material usage. The demand for a highly responsive and highly efficient device with an inexpensive fabrication method is always of paramount importance. Carbon nanotubes (CNT) are well known, owing to their upheld vigorous structural and optoelectronic characteristics, but to fabricate them at a large scale involves multifarious processes. A visible range photodetector device structure developed using a simple and inexpensive drop-casting technique is reported here. The optoelectronic characteristics of the device are studied with IV measurements under light and dark conditions by incorporating a thin CNT layer on top of a tungsten-disulfide-based heterojunction photodetector to enhance the overall characteristics such as detectivity, responsivity, photocurrent, rise time, and fall time in the visible range of the light spectrum with a violet light source at 441 nm. In the DC bias voltage range of -20 to 20 V, IV measurements are carried out under dark and illumination conditions with different incident power densities. The threshold voltage is recognized at 2.0 V. Photocurrent is found to be highly dependent on the state of the incident light. For 0.3074 mW/cm(2) illuminated power, the highest responsivity and detectivity are determined to be 0.57 A/W and 2.89 x 10(11) Jones. These findings encourage an alternative fabrication method at a large scale to grow CNTs for the enhancement of optoelectronic properties of present two-dimensional-material-based optoelectronic and photonics applications. (C) 2021 Optical Society of America
| Item Type: | Article |
|---|---|
| Funders: | Universiti Kebangsaan Malaysia (MI-2020-002), Ministry of Energy, Science, Technology, Environment and Climate Change (MESTECC), Malaysia (IF0419IF1082) |
| Uncontrolled Keywords: | Two-dimensional-material-based photodetectors; Carbon nanotubes; Optoelectronic applications; Photocurrent; Nanostructured materials; |
| Subjects: | Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 12 Apr 2022 06:15 |
| Last Modified: | 12 Apr 2022 06:15 |
| URI: | http://eprints.um.edu.my/id/eprint/28327 |
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