材料科学
插层(化学)
钙钛矿(结构)
电极
灵敏度(控制系统)
探测器
X射线探测器
X射线
光电子学
粒度
纳米技术
无机化学
化学工程
光学
复合材料
物理化学
电子工程
物理
工程类
化学
作者
Xi Qin,Jiguang Han,Yingjun Chai,Bing Cao,Ankang Li,Haibo Zeng,Xiaoming Li
标识
DOI:10.1021/acsami.4c10343
摘要
Organic-inorganic hybrid perovskites have been recognized as potential candidates in direct X-ray detectors and have triggered tremendous interest in the past years. The blade coating method meets the requirements of large area and low cost for perovskite X-ray detectors, while the low compactness resulting from solvent evaporation limits the charge collection efficiency (CCE) and device sensitivity. Most of the reports are focused on the melioration of perovskite films to increase device sensitivity; there are still problems of low CCE. Herein, we introduce an intercalation-electrode device structure and achieve a ∼20-fold sensitivity enhancement. Carrier distribution throughout the thick films is simulated, and the electrode intercalating site can be optimized according to the mobility-lifetime factor to achieve the highest CCE. A methylamine thiocyanate (MASCN) additive-assisted coating strategy is developed, and pinhole free thick films with regrown particles are obtained without frequently used hot/soft pressing. A sensitivity level of ∼10
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