期刊
NATURE PHOTONICS
卷 11, 期 11, 页码 726-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41566-017-0012-4
关键词
-
资金
- Major State Basic Research Development Program of China [2016YFB0700700, 2016YFA0204000]
- National Natural Science Foundation of China [91433105, 11674237, 51602211, 61501197, 61425001]
- HUST Key Innovation Team for Interdisciplinary Promotion [2016JCTD111, 2017KFXKJC003]
- Natural Science Foundation of Jiangsu Province of China [BK20160299]
Sensitive X-ray detection is crucial for medical diagnosis, industrial inspection and scientific research. The recently described hybrid lead halide perovskites have demonstrated low-cost fabrication and outstanding performance for direct X-ray detection, but they all contain toxic Pb in a soluble form. Here, we report sensitive X-ray detectors using solution-processed double perovskite Cs2AgBiBr6 single crystals. Through thermal annealing and surface treatment, we largely eliminate Ag+/Bi3+ disordering and improve the crystal resistivity, resulting in a detector with a minimum detectable dose rate as low as 59.7 nGy(air)s(-1), comparable to the latest record of 0.036 mu Gy(air)s(-1) using CH3NH3PbBr3 single crystals. Suppressed ion migration in Cs2AgBiBr6 permits relatively large external bias, guaranteeing efficient charge collection without a substantial increase in noise current and thus enabling the low detection limit.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据