The all-inorganic CsPbX3 (X=Br, Cl and I) perovskites have attracted considerate attention because of their potential and promising applications in optoelectronic devices. Herein, all-inorganic CsPbBr3 thin films were fabricated by a solution-processed synthesis at low temperature. For the photodetector fabrication, the all-inorganic perovskite films were utilized interdigital patterned gold electrodes and photoconductive detectors were obtained. The detailed structural properties showed that these as-prepared films were typical CsPbBr3 perovskite structure by X-ray diffraction (XRD) and X-ray photoelectron spectroscope (XPS) technique. The scanning electron microscopy (SEM) suggested that the surface of CsPbBr3 thin films was dense and smooth. And the as-fabricated films appeared photoluminescence emission at around 525 nm. Moreover, the as-constructed CsPbBr3-based photodetector exhibited faster photoresponse characteristics of short decay time (0.213 s) and rise time (0.233 s). As a key basis of merit, quick response speed is supposed to originate from the fast extraction and efficient generation of photoinduced charge carriers as well as small leakage current, which not only suggests that all-inorganic CsPbBr3 is a promising material for photodetector application, but also provides a low-cost and simple method for visible-light optoelectronic sensor application.

中文翻译：

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用于光电应用的溶液处理全无机钙钛矿 CsPbBr3 薄膜


全无机 CsPbX3 （X=Br， Cl 和 I） 钙钛矿因其在光电器件中的潜在和有前途的应用而引起了人们的广泛关注。在此，通过在低温下溶液处理合成制备了全无机 CsPbBr3 薄膜。对于光电探测器的制造，利用全无机钙钛矿薄膜的数字间图案金电极并获得光电导探测器。详细的结构性质表明，通过 X 射线衍射 （XRD） 和 X 射线光电子能谱 （XPS） 技术，这些薄膜是典型的 CsPbBr3 钙钛矿结构。扫描电子显微镜 （SEM） 表明 CsPbBr3 薄膜表面致密光滑。制备的薄膜在 525 nm 附近出现光致发光发射。此外，基于CsPbBr3的光电探测器表现出较快的光响应特性，衰减时间短（0.213 s）和上升时间（0.233 s）。作为关键品质的基础，快速响应速度应该源于光生载流子的快速提取和高效产生以及较小的泄漏电流，这不仅表明全无机 CsPbBr3 是一种很有前途的光电探测器应用材料，而且为可见光光电传感器应用提供了一种低成本、简单的方法。