Fan Qingshun, Xu Haojie, You Shihai, Ma Yu, Liu Yi, Guo Wuqian, Hu Xinxin, Wang Beibei, Gao Changhao, Liu Wei, Luo Junhua, Sun Zhihua
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China.
College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Small. 2023 Aug;19(34):e2301594. doi: 10.1002/smll.202301594. Epub 2023 Apr 22.
2D Dion-Jacobson (DJ) phase hybrid perovskites have shown great promise in the photoelectronic field owing to their outstanding optoelectronic performance and superior structural rigidity. However, DJ phase lead-free double perovskites are still a virgin land with direct X-ray detection. Herein, we have designed and synthesized a new DJ phase lead-free layered double perovskite of (HIS) AgSbBr (1, HIS = histammonium). Centimeter-sized (18 × 10 × 5 mm ) single crystals of 1 are successfully grown via the temperature cooling technique, exhibiting remarkable semiconductive characteristics such as a high resistivity (2.2 × 10 Ω cm), a low trap state density (3.56 × 10 cm ), and a large mobility-lifetime product (1.72 × 10 cm V ). Strikingly, its single-crystal-based X-ray detector shows a high sensitivity of 223 µC Gy cm under 33.3 V mm , a low detection limit (84.2 nGy s ) and superior anti-fatigue. As far as we know, we firstly demonstrates the potential of 2D DJ phase lead-free hybrid double perovskite in X-ray detection, showing excellent photoelectric response and operational stability. This work will pave a promising pathway to the innovative application of hybrid perovskites for eco-friendly and efficient X-ray detection.
二维狄翁-雅各布森（DJ）相混合钙钛矿由于其出色的光电性能和卓越的结构刚性，在光电领域展现出了巨大的潜力。然而，DJ相无铅双钙钛矿在直接X射线检测方面仍是一片未开垦的领域。在此，我们设计并合成了一种新型的DJ相无铅层状双钙钛矿（HIS）AgSbBr（1，HIS = 组胺铵）。通过温度冷却技术成功生长出了厘米尺寸（18×10×5 mm）的1的单晶，其表现出显著的半导体特性，如高电阻率（2.2×10 Ω·cm）、低陷阱态密度（3.56×10 cm）和大的迁移率-寿命乘积（1.72×10 cm² V⁻¹）。引人注目的是，其基于单晶的X射线探测器在33.3 V/mm下显示出223 µC Gy⁻¹ cm⁻²的高灵敏度、低检测限（84.2 nGy s⁻¹）和优异的抗疲劳性能。据我们所知，我们首次展示了二维DJ相无铅混合双钙钛矿在X射线检测中的潜力，并表现出优异的光电响应和操作稳定性。这项工作将为混合钙钛矿在环保高效X射线检测方面的创新应用开辟一条充满希望的道路。
