X-ray detectors based on CsPb1-xSrxBr3 thick films

The CsPbX3 perovskites have demonstrated promising applications in the field of X-ray detection. Appropriate element doping to substitute Pb in CsPbX3 not only improves the photoresponse performance of the resulting material but also reduces the Pb content for achieving environmental protection. Herein, X-ray detectors based on Sr-doped CsPb1-xSrxBr3 thick films were developed. The effects of Sr doping concentration were investigated. The incorporation of Sr increased the density of the CsPbBr3 thick film and modulated the bandgap of the materials. CsPb1-xSrxBr3 exhibited good optical responses at different bias voltages and X-ray doses. The X-ray response improved as the Sr-doping concentration increased. Therefore, the partial substitution of Sr into CsPbBr3 is suitable for reducing the Pb content in X-ray detectors. Furthermore, the development of CsPb1-xSrxBr3 thick films provides a new strategy for the detection of X-rays.