TY - JOUR
T1 - Suppressed ion migration for high-performance X-ray detectors based on atmosphere-controlled EFG-grown perovskite CsPbBr3 single crystals
AU - Hua, Yunqiu
AU - Zhang, Guodong
AU - Sun, Xue
AU - Zhang, Peng
AU - Hao, Yingying
AU - Xu, Yadong
AU - Yang, Yujie
AU - Lin, Qianqian
AU - Li, Xiang
AU - Zhai, Zhongjun
AU - Cui, Fucai
AU - Liu, Hongjie
AU - Liu, Jiaxin
AU - Tao, Xutang
N1 - Publisher Copyright:
© The Author(s), under exclusive licence to Springer Nature Limited 2024.
PY - 2024/8
Y1 - 2024/8
N2 - Halide perovskites have shown great potential for X-ray detection in medical imaging and product inspection applications. However, the ion migration in perovskites causes large noise and baseline drift, deteriorating the X-ray detection and imaging performance. Here we adopt the atmosphere-controlled edge-defined film-fed growth (EFG) method to grow high-quality shape-controlled CsPbBr3 single crystals (SCs) in an Ar and HBr mixed atmosphere. Compared with the vertical Bridgman (VB)-CsPbBr3 SCs, the EFG-CsPbBr3 SCs show a much lower trap density, a higher resistivity (1.61 × 1010 Ω cm) and a larger ion migration activation energy (0.378 eV), decreasing the leakage current and baseline drift. An X-ray detector based on EFG-CsPbBr3 SCs hence exhibits outstanding balanced performance, with a negligible dark-current drift of 1.68 × 10−9 μA cm−1 s−1 V−1, an incredibly low detection limit of 10.81 nGyair s−1 and a sensitivity of 46,180 μC Gyair−1 cm−2 under a high electric field of 5,000 V cm−1. Furthermore, the detector maintains a stable response for 30 days. Our work provides an effective strategy to improve lead-halide perovskite SCs for high-performance X-ray detection and imaging.
AB - Halide perovskites have shown great potential for X-ray detection in medical imaging and product inspection applications. However, the ion migration in perovskites causes large noise and baseline drift, deteriorating the X-ray detection and imaging performance. Here we adopt the atmosphere-controlled edge-defined film-fed growth (EFG) method to grow high-quality shape-controlled CsPbBr3 single crystals (SCs) in an Ar and HBr mixed atmosphere. Compared with the vertical Bridgman (VB)-CsPbBr3 SCs, the EFG-CsPbBr3 SCs show a much lower trap density, a higher resistivity (1.61 × 1010 Ω cm) and a larger ion migration activation energy (0.378 eV), decreasing the leakage current and baseline drift. An X-ray detector based on EFG-CsPbBr3 SCs hence exhibits outstanding balanced performance, with a negligible dark-current drift of 1.68 × 10−9 μA cm−1 s−1 V−1, an incredibly low detection limit of 10.81 nGyair s−1 and a sensitivity of 46,180 μC Gyair−1 cm−2 under a high electric field of 5,000 V cm−1. Furthermore, the detector maintains a stable response for 30 days. Our work provides an effective strategy to improve lead-halide perovskite SCs for high-performance X-ray detection and imaging.
UR - http://www.scopus.com/inward/record.url?scp=85199969287&partnerID=8YFLogxK
U2 - 10.1038/s41566-024-01480-5
DO - 10.1038/s41566-024-01480-5
M3 - 文章
AN - SCOPUS:85199969287
SN - 1749-4885
VL - 18
SP - 870
EP - 877
JO - Nature Photonics
JF - Nature Photonics
IS - 8
ER -