Nanomaterials (Nov 2024)

High-Performance Self-Powered Dual-Mode Ultraviolet Photodetector Based on (PEA)<sub>2</sub>PbI<sub>4</sub>/GaN Heterojunction

  • Ang Bian,
  • Songchao Shen,
  • Chen Yang,
  • Jun Dai

DOI
https://doi.org/10.3390/nano14221819
Journal volume & issue
Vol. 14, no. 22
p. 1819

Abstract

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Wide-bandgap semiconductors like GaN, known for their superior photoresponse and detection capabilities in the ultraviolet range, represent a foundational component in the design of advanced photodetectors, where the integration of materials with distinct spectral sensitivities into heterojunctions is pivotal for next-generation device innovation. A high-performance self-powered dual-mode ultraviolet photodetector based on a (PEA)2PbI4/GaN heterojunction was fabricated via spin coating. The device exhibits outstanding UV sensitivity under both positive and negative bias, achieving a responsivity of 1.39 A/W and a detectivity of 8.71 × 1010 Jones under 365 nm UV illumination. The built-in electric field at the heterojunction interface enables self-powered operation, achieving a rapid rise time of 46.9 ms and a decay time of 55.9 ms. These findings offer valuable insights into the development and application of perovskite and wide-bandgap semiconductor heterojunctions in optoelectronic devices.

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