Bilayer-Assisted Substrate Engineering for Fully Vacuum-Deposited CsPbI2Br Perovskite Photodetectors

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This approach improves detectivity and stability in perovskite photodetectors, indicating their utility for Li-Fi applications.

The CsPbI2Br photodetector achieved a detectivity of 2.0 × 1013 Jones, showcasing its high performance.
Utilizing a bilayer-engineered substrate allowed for optimal crystallization and a fast response time of ∼2 μs.
The device maintained 70% of its initial photocurrent after 30 days in continuous illumination, emphasizing long-term stability.
Compatible with OLED processes, this fabrication route aids future integration into optoelectronic production lines.

Chen et al. (2025) studied this question.

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