Detector-grade perovskite single-crystal wafers via stress-free gel-confined solution growth targeting high-resolution ionizing radiation detection

Yilong Song; Lixiang Wang; Yongqiang Shi; Weihui Bi; Jianwu Chen; Mingwei Hao; Anran Wang; Xueying Yang; Yuan Sun; Fan Yu; Liansheng Li; Yanjun Fang; Deren Yang; Qingfeng Dong

doi:10.1038/s41377-023-01129-y

Detector-grade perovskite single-crystal wafers via stress-free gel-confined solution growth targeting high-resolution ionizing radiation detection

Light Sci Appl. 2023 Apr 3;12(1):85. doi: 10.1038/s41377-023-01129-y.

Authors

Yilong Song^#¹, Lixiang Wang^#², Yongqiang Shi^#^{3

4}, Weihui Bi¹, Jianwu Chen^{3

4}, Mingwei Hao¹, Anran Wang¹, Xueying Yang¹, Yuan Sun¹, Fan Yu¹, Liansheng Li^{5

6}, Yanjun Fang^{7

8}, Deren Yang², Qingfeng Dong⁹

Affiliations

¹ State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, China.
² State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
³ Beijing Institute of Control Engineering, Beijing, 100190, China.
⁴ Science and Technology on Space Intelligent Control Laboratory, Beijing, 100190, China.
⁵ Beijing Institute of Control Engineering, Beijing, 100190, China. liliansheng502@163.com.
⁶ Science and Technology on Space Intelligent Control Laboratory, Beijing, 100190, China. liliansheng502@163.com.
⁷ State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China. jkfang@zju.edu.cn.
⁸ Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan, 030024, China. jkfang@zju.edu.cn.
⁹ State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, China. qfdong@jlu.edu.cn.

^# Contributed equally.

Abstract

Solution-processed organic‒inorganic halide perovskite (OIHP) single crystals (SCs) have demonstrated great potential in ionizing radiation detection due to their outstanding charge transport properties and low-cost preparation. However, the energy resolution (ER) and stability of OIHP detectors still lag far behind those of melt-grown inorganic perovskite and commercial CdZnTe counterparts due to the absence of detector-grade high-quality OIHP SCs. Here, we reveal that the crystallinity and uniformity of OIHP SCs are drastically improved by relieving interfacial stress with a facial gel-confined solution growth strategy, thus enabling the direct preparation of large-area detector-grade SC wafers up to 4 cm with drastically suppressed electronic and ionic defects. The resultant radiation detectors show both a small dark current below 1 nA and excellent baseline stability of 4.0 × 10^-8nA cm^-1 s^-1 V^-1, which are rarely realized in OIHP detectors. Consequently, a record high ER of 4.9% at 59.5 keV is achieved under a standard ²⁴¹Am gamma-ray source with an ultralow operating bias of 5 V, representing the best gamma-ray spectroscopy performance among all solution-processed semiconductor radiation detectors ever reported.

Abstract

Grants and funding