期刊
ACS PHOTONICS
卷 5, 期 8, 页码 3172-3178出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.8b00397
关键词
speed sensor; perovskite; single crystal; ultrafast; stability
类别
资金
- Science Challenge Project [TZ2018004]
- Tsinghua University Initiative Scientific Research Program [20161080165]
- Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics [KF201516]
A nanosecond-response speed sensor is demonstrated based on a CH3NH3PbI3 perovskite single crystal photodetector array. The responsivity of the CH3NH3PbI3 photodetector unit is as high as 1.55 x 10(2) A/W under 1.93 x 10(-2) mW/cm(2) illumination with a 532 nm laser. The ultrafast response time of less than 12.5 ns makes it possible for ultra-high-speed detection. Owing to the uniformity of as-prepared CH3NH3PbI3 single crystals, each array element shows a consistent performance. When a shelter moves across the photodetector array, the time delay of the photoresponses between two neighboring array elements can be recorded promptly. Therefore, the speed of the moving shelter can be calculated easily. Besides speed sensing, the ability to capture the trajectory of a moving object is also demonstrated. The nanosecond response speed sensor presented here demonstrates great potential for applying in high-speed detection.
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