Journal
NANO LETTERS
Volume 21, Issue 9, Pages 3947-3955Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.1c00700
Keywords
FAPbBr(3) single crystals; X-ray detectors; photodetectors; diffuse imaging; high temperature stability
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Funding
- National Natural Science Foundation of China [61875072]
- Key Research and Development Projects of Jilin Science and Technology Department [20200401044GX]
- Special Funds for Basic Scientific Research Operating Expenses of Central Universities [2020-JCXK-06]
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Organolead trihalide perovskite single crystals offer unprecedented opportunity for X-ray and visible light detection, and formamidinium lead bromide single crystals are developed to address the challenge of maintaining high-performance and stability at high temperatures. These crystals demonstrate excellent performance as radiation detectors with low X-ray dose rate and high detectivity, as well as stability as photodetectors at high temperatures. The development of these bifunctional detectors could pave the way for stable detection in extreme space environments.
Organolead trihalide perovskite single crystals (SCs) offer unprecedented opportunity for X-ray and visible light detection. Nevertheless, it remains a challenge to keep simultaneous high-performance and stability at a high-temperature working mode. Herein, formamidinium lead bromide (FAPbBr(3)) SCs are developed to successfully address these issues. Low-temperature crystallized induced FAPbBr(3) SCs possess an excellent mobility-lifetime product and an ultralow surface charge recombination velocity, thus exhibiting an X-ray dose rate as low as 0.3 mu Gy(air) s(-1) as a sensitive radiation detector. Furthermore, it also contributes a specific detectivity as high as 3.5 x 10(12) cm Hz(1/2) W-1, keeping stable at high-temperature of 460 K as a photodetector. A prototype of an imaging system with diffuse reflection mode is constructed using detectors as receivers, enabling defined scanning images in a high temperature environment. The bifunctional FAPbBr(3) SC detectors will motivate new strategies for stable detection in an extreme space environment.
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