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Ultralow-Noise Perovskite Photodiodes Enabling High-Fidelity Full-Color Imaging.

Chun-Jen Shih¹, Galing Murokinas¹, Meng-Chi Li¹

¹College of Engineering & Organic Electronics Research Center, Ming Chi University of Technology, New Taipei, Taiwan.

|July 13, 2026

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Engineered perovskite photodiodes achieve ultralow noise and high reliability for advanced imaging. This vacuum-deposited multilayer design overcomes limitations of solution-processed films, enabling stable, high-performance photodetectors.

Area of Science:

Materials Science
Optoelectronics
Device Physics

Background:

Perovskite photodiodes offer potential for next-generation imaging and sensing.
Current limitations include high noise, variability, and poor reliability due to interfacial defects in solution-processed films.

Purpose of the Study:

To develop a perovskite photodiode architecture with ultralow noise, high reproducibility, and improved operational reliability.
To address the challenges posed by interfacial defects and carrier recombination in perovskite films.

Main Methods:

Fabrication of perovskite photodiodes using a vacuum-engineered multilayer deposition technique.
Characterization of device performance, including dark current, quantum efficiency, dynamic range, bandwidth, and operational stability.

Keywords:

defect passivation full‑color imaging perovskite photodiodes vapor deposition

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Main Results:

Achieved ultralow dark current density (2.31 × 10^-11 A cm^-2 at 0.2 V) and high external quantum efficiency (>80%).
Demonstrated a wide linear dynamic range (130 dB) and a -3 dB bandwidth of 0.33 MHz.
Exhibited high-fidelity full-color imaging capabilities with low noise and maintained over 80% performance after 500 hours of continuous illumination.

Conclusions:

The vacuum-engineered multilayer design effectively suppresses interfacial defects, leading to reduced noise and stable charge transport.
The developed perovskite photodiodes exhibit imaging-level performance, surpassing conventional silicon technologies in specific metrics.
This strategy provides a viable pathway for scalable, high-performance, and reliable perovskite-based imaging systems.