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Publications

Journal Article Ppublish

PubMed: 40963211 DOI: 10.1021/acsami.5c09057

Bilayer-Assisted Substrate Engineering for Fully Vacuum-Deposited CsPbI 2Br Perovskite Photodetectors.

ACS Appl Mater Interfaces 17(39):55131-55142

Authors: Yi-Sheng Chen, Chih-Chien Lee, Yen-Ni Kuo, M Rivaldi Ali Septian, I-Sheng Hsu, Dian Luo, Shun-Wei Liu

Affiliations

  • College of Engineering & Organic Electronic Research Center, Ming Chi University of Technology, New Taipei City 243303, Taiwan.
  • Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei City 106335, Taiwan.
  • College of Engineering & Organic Electronic Research Center, Ming Chi University of Technology, New Taipei City 243303, Taiwan. Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei City 106335, Taiwan.
  • College of Engineering & Organic Electronic Research Center, Ming Chi University of Technology, New Taipei City 243303, Taiwan. School of Electrical Engineering, Telkom University, Bandung 40257, Indonesia.
  • Department of Electronic Engineering, Ming Chi University of Technology, New Taipei City 243303, Taiwan.
  • Center for Sustainability and Energy Technologies, Chang Gung University, Taoyuan 33302, Taiwan.

Abstract

The advancement of all-inorganic metal halide perovskites for visible light detection has been constrained by challenges in scalable, continuous fabrication that ensure both high-quality film formation and robust device stability. Here, we report one of the few all-inorganic perovskite photodetectors (PDs) fabricated entirely through a fully vacuum-based, continuous deposition process, without any solution processing, using a bilayer-engineered substrate to promote uniform crystallization and optimal interface formation. The CsPbI 2Br PD achieves a dark current density of 9.2 × 10 - 10 A cm - 2, a specific detectivity (D*) of 2.0 × 10 13 Jones, and a fast response time of ∼2 μs, along with a linear dynamic range of 109 dB and a cutoff frequency exceeding 300 kHz, underscoring its utility in high-speed optical communication and real-time audio transmission. Long-term operational stability is also demonstrated, with the device retaining 70% of its initial photocurrent after 30 days under continuous AM 1.5G illumination. Importantly, we integrated the PD into a functional Li-Fi system, successfully validating its data transmission capability. Notably, the proposed fabrication route is fully compatible with existing OLED manufacturing processes, providing a clear pathway for future integration of perovskite-based photodetectors into mature optoelectronic production lines. This work establishes a rare, continuous, and fully vacuum-deposited fabrication strategy for all-inorganic perovskite PDs, advancing their readiness for scalable, high-speed optoelectronic applications.

MeSH

Vacuum