摘要
X-ray detection is of great significance in biomedical,nondestructive,and scientific research.Lead halide perovskites have recently emerged as one of the most promising materials for direct X-ray detection.However,the lead toxicity remains a worrisome concern for further commercial application.Great efforts have been made to search for lead-free perovskites with similar optoelectronic properties.Here,we present a lead-free oxide double perovskite material Ba2AgIO6 for X-ray detection.The lead-free,all-inorganic nature,as well as the high density of Ba2AgIO6,promises excellent prospects in X-ray applications.By employing the hydrothermal method,we successfully synthesized highly crystalline Ba2AgIO6 powder with pure phase.Furthermore,we prepared Ba2AgIO6 wafers through isostatic pressure and built X-ray detectors with Au/Ba2AgIO6 wafer/Au photoconductive structure.The as-prepared X-ray detectors showed a sensitivity of 18.9μC/(Gyair$cm2)at 5 V/mm,similar to commercialα-Se detectors showcasing their advantages for X-ray detection.
基金
the National Postdoctoral Program for Innovative Talent(No.BX20200142)
the National Natural Science Foundation of China(Grant Nos.61725401,5171101030,and 51761145048)
the National Key R&D Program of China(Nos.2016YFB0700702,2016YFA0204000,and 2016YFB0201204)
the HUST Key Innovation Team for Interdisciplinary Promotion(No.2016JCTD111)
China Postdoctoral Science Foundation(Nos.2020M62004075 and 2020M62005089).
