Self-Powered All-Inorganic Perovskite Photodetectors with Fast Response Speed

• Main Authors: Ting Zhang, Shibin Li
• Format: Article
• Language: English
• Published: SpringerOpen 2021-01-01
• Series: Nanoscale Research Letters
• Subjects: CsPbI2Br; CsPbIBr2; Anti-solvent processing; Self-powered capability
• Online Access: https://doi.org/10.1186/s11671-020-03460-4

Abstract In this manuscript, the inorganic perovskite CsPbI2Br and CsPbIBr2 are investigated as photoactive materials that offer higher stability than the organometal trihalide perovskite materials. The fabrication methods allow anti-solvent processing the CsPbI x Br3−x films, overcoming the poor film quality that always occur in a single-step solution process. The introduced diethyl ether in spin-coating process is demonstrated to be successful, and the effects of the anti-solvent on film quality are studied. The devices fabricated using the methods achieve high-performance, self-powered and the stabilized photodetectors show fast response speed. The results illustrate a great potential of all-inorganic CsPbI x Br3−x perovskites in visible photodetection and provide an effective way to achieve high performance devices with self-powered capability.