Zheng Guangya, Wu Haodi, He Song, Li Hanchen, Dong Zhiwu, Jin Tong, Pang Jincong, Masrour Rachid, Zheng Zhiping, Niu Guangda, Xu Ling, Tang Jiang
Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei Province, 430074, China.
Research Center for Advanced Detection Materials and Medical Imaging Devices, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong Province, 518055, China.
Small. 2025 Feb;21(5):e2408720. doi: 10.1002/smll.202408720. Epub 2024 Dec 19.
3D and 2D organic hybrid perovskites, as well as double perovskites, have demonstrated their suitability for direct X-ray detection. However, the sensitivity and stability of 3D perovskite X-ray detectors are currently being hindered by the existing constraints on ion movement. Therefore, there is an immediate need to develop X-ray detectors that are both highly sensitive and stable while also being environmentally friendly. The novel low-dimensional perovskites demonstrate exceptional inherent stability and effectively mitigate ion migration, thereby showcasing their remarkable photoelectric performance. Inspired by this, a solution crystallization method is employed to synthesize novel single crystals (SCs) of one dimensional (1D) (TMHD)SbBr. The dimensions of the chained (TMHD)SbBr SC are 13 × 1.3 × 1.2 mm in size. The device based on a perovskite chain (TMHD)SbBr exhibits unique anisotropic X-ray detection performance with a sensitivity of 62.8 and 30.5 µC Gy cm in the parallel and perpendicular orientations, respectively. It can lead to the directional movement of ions, resulting in large carrier mobility under the action of electric fields, and effectively increase the sensitivity to X-ray detection.
三维和二维有机杂化钙钛矿以及双钙钛矿已证明其适用于直接X射线检测。然而，三维钙钛矿X射线探测器的灵敏度和稳定性目前正受到离子移动现有限制的阻碍。因此，迫切需要开发既高度灵敏又稳定且环保的X射线探测器。新型低维钙钛矿具有出色的固有稳定性，并能有效减轻离子迁移，从而展现出其卓越的光电性能。受此启发，采用溶液结晶法合成了新型一维（1D）（TMHD）SbBr单晶（SCs）。链状（TMHD）SbBr单晶的尺寸为13×1.3×1.2毫米。基于钙钛矿链（TMHD）SbBr的器件表现出独特的各向异性X射线检测性能，在平行和垂直方向上的灵敏度分别为62.8和30.5μC Gy cm 。它可导致离子的定向移动，在电场作用下产生较大的载流子迁移率，并有效提高对X射线检测的灵敏度。
