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Scalable Fabrication of High-Performance UV Photodetectors Using Spin-Coated SWCNT/Polyaniline Nanocomposites

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Abstract:

Ultraviolet (UV) photodetectors have garnered considerable attention because of their critical roles in diverse technological applications. This study reports the fabrication and characterization of single-walled carbon nanotube (SWCNT)/polyaniline (PANI) nanocomposite films prepared via the spin-coating technique on Indium Tin Oxide (ITO) substrates for ultraviolet (UV) photodetector applications. Two weight concentrations of SWCNTs (0.04 g and 0.06 g) were investigated to assess their influence on the optical and structural properties of the films. Structural consistency was confirmed using scanning electron microscopy (SEM), while UV–visible spectroscopy revealed optical band gaps of 1.60–2.08 eV. Electrical characterization demonstrated that an increased SWCNT content led to an enhanced current response. The device with 0.04 g SWCNT achieved a detectivity of 1.12 × 10¹⁶ Jones and a photoresponsivity of 11.361 μA/mW, with response and recovery times of 0.36 s and 0.34 s, respectively. The 0.06 g SWCNT device showed improved performance, reaching a photoresponsivity of 12.1414 μA/W and detectivity of 1.43 × 10¹⁶ Jones, with response and recovery times of 0.36 s and 0.38 s, respectively. These findings demonstrate the potential of SWCNT/PANI composites for high-performance UV photodetector applications.

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Periodical:

Materials Science Forum (Volume 1189)

Pages:

151-161

DOI:

https://doi.org/10.4028/p-XVtm1D

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Online since:

May 2026

Authors:

Kadhim A. Hubeatir, Iman N. Nassef, Hawraa Khudeir*, Bayan Mahdi Sabbar

Keywords:

Nanocomposite, Photodetector, Polyaniline, SWCNT

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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