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High-Sensitivity and Fast-Response Photomultiplication Type Photodetectors Based on Quasi-2D Perovskite Films for
Guohua Ma1, Yanna Hou1, Zhenwang Luo1
1Department of Microelectronic Science and Engineering, School of Physical Science and Technology, Ningbo University, Ningbo, 315211, China.
Small (Weinheim an Der Bergstrasse, Germany)
|September 25, 2024
Summary
Advanced photomultiplication photodetectors (PM-PDs) using quasi-2D perovskites achieve high sensitivity for weak light detection. These novel PM-PDs operate at low voltages and demonstrate excellent performance for future communication systems.
Area of Science:
- Materials Science
- Optoelectronics
- Semiconductor Physics
Background:
- Photovoltaic photodiodes struggle with weak light detection.
- Photomultiplication photodetectors (PM-PDs) offer superior sensitivity to faint signals.
Purpose of the Study:
- To introduce an advanced PM-PD based on quasi-2D Ruddlesden-Popper (Q-2D RP) perovskites.
- To optimize PM-PDs for weak light detection at minimal operating voltages.
Main Methods:
- Utilized Q-2D RP perovskites with abundant surface and bulk traps.
- Investigated trap-assisted tunneling for photomultiplication (PM) effect.
- Characterized device performance including response time, responsivity, external quantum efficiency, and detectivity.
Main Results:
- Achieved fast rise/fall times of 1.14/1.72 µs.
- Demonstrated high responsivity (45.89 A/W) and external quantum efficiency (14400%) at -1 V.
- Obtained a detectivity of 4.23 × 10^12 Jones due to low dark current from Q-2D perovskite's high resistance.
Conclusions:
- Q-2D RP perovskite-based PM-PDs show significant potential for weak light detection.
- The developed PM-PDs are suitable for low-power, high-performance applications, including weak-light communication systems.
