Self‐Organizing Pixelated Cs<sub>4</sub>PbBr<sub>6</sub> Scintillator Plate for Large‐Area, Ultra‐Flexible, High Spatial Resolution and Stable X‐Ray Imaging
Guoqiang Peng, Baoyi An, Huanyu Chen, Zhizai Li, Youkui Xu, Qian Wang, Tao Wang, Haoxu Wang, Liming Ding, Zhiwen Jin
Abstract
Abstract Nowadays, high performance (stability, spatial resolution, and optical yield) and multi‐functional application (low‐cost, large‐area, and flexible) are urgently needed for X‐ray detectors in national defense and medical treatment et al. Herein, self‐organizing pixelated zero‐dimensional metal halide Cs 4 PbBr 6 based micro‐disks for low‐cost (0.0238 $ cm −2 , 1/37 of CsI(Tl)), large‐area and ultra‐flexible scintillator plates are designed, prepared and applied. The theoretical model describes that the micro‐disks‐based structure being separated from others by air can reduce the transverse optical diffusion within the scintillator, especially when the optical boundary of “pixel” surface is changed by metal coating. Meanwhile, such structure also inhibits the stress generation in the crystal when bent. Further characterization points out that the fabricated scintillator plate possesses high spatial resolution (≈15.9 lp mm −1 ) and light yield (≈19000 ph Me V −1 ). Especially, the device shows excellent stability and almost no deterioration of spatial resolution after aging in various extreme environments and in extreme bending tests (folding, keeping bending for a long time). Finally, the good suitability to couple with various photoelectric devices and successful imaging demonstrations of nondestructive measurement are exhibited. It is believed that these findings provide a low‐cost and flexible scintillator preparation scheme and demonstrate a pre‐eminent design paradigm.