Targeting flexible photodetectors responsive to specific irradiation spectra based on polymer-based composites

• Type: Article in International Scientific Journal
• Date: 2025

Authors

Raimundo, RP (Author) Other; Correia, V (Author) FEUP; Goncalves, BF (Author) Other; Costa, P (Author) Other; Tubio, CR (Author) Other; Salado, M (Author) Other; Lima, AC (Author) Other; Cardoso, VF (Author) Other; Lanceros Méndez, S (Author) Other

Journal

Title: Journal of Power Sources

Vol. 626

ISSN: 0378-7753

Publisher: Elsevier

Indexing

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Other information

Authenticus ID: P-017-ACA

DOI: 10.1016/j.jpowsour.2024.235790

Abstract (EN): The growing demand for advanced technologies to support the Internet of Things has prompted the search for innovative, flexible, lightweight, and cost-effective optoelectronic devices for large-scale applications. Photodetectors (PDs) convert optical signals into measurable electrical signals, making them essential in fields such as health monitoring, optical communication, and solar cells. This work embeds inorganic ZnO and CuO nanoparticles, as well as CsPbI3 perovskite nanocrystals, in flexible and stretchable thermoplastic copolymer styrene ethylene butylene styrene (SEBS). The films were processed using the doctor blade technique and evaluated for their mechanical, optical, morphological, and thermal properties. Interdigitated electrodes were screen-printed on the films, which were then irradiated with visible and X-ray radiation to assess their electrical properties. Pristine SEBS films showed consistent conductivity under all irradiation conditions. In turn, SEBS@ZnO films showed increased conductivity under visible irradiation (similar to 9.9 x 10(-5)(Omegamm)(-1)) but minimal response to X-rays, while CuO@SEBS films exhibited conductivity under both visible light and X-rays, with slightly higher conductivity under X-ray irradiation (similar to 6.2 x 10(-6)(Omegamm)(-1)) compared to visible light (similar to 2.8 x 10(-6)(Omegamm)(-1)). Finally, SEBS@CsPbI3 films uniquely responded to X-ray irradiation with a conductivity of similar to 5.9 x 10(-4)(Omegamm)(-1). These findings highlight the potential of flexible polymer-based composites for diverse applications, paving the way for lightweight, cost-effective, and adaptable PD systems.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9