An all-solid-state photo-rechargeable battery based on Cs3Bi2I9. Issue 20 (17th February 2023)

• Record Type: Journal Article
• Authors: Zhang, Rui; Chen, Zeng; Ma, Jiping; Zhang, Putao; Liu, Meiyue; Li, Xiaohui; Zhao, Ru; Tang, Jianyao; Ren, Zhengyu; Li, Shengjun
• Is Part Of: Chemical communications. Volume 59:Issue 20(2023)
• Page Start: 2911
• Page End: 2914
• Publication Date: 2023-02-17
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/d2cc06662a
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : The mechanism of FTO/TiO2 /Cs3 Bi2 I9 /Pt/FTO cells is that the illumination provides photoexcited electrons for the reduction of Bi 3+ ions, and then, the reduced Bi is reoxidized to Bi 3+ during the discharge process through an external circuit. Abstract : Here, we present a new two-electrode photo-rechargeable FTO/TiO2 /Cs3 Bi2 I9 /Pt/FTO system. The key material is the photoactive lead-free perovskite Cs3 Bi2 I9, which performs photoelectric conversion and provides energy storage. This study is the first example of a battery system in which charging and discharging are based on bismuth redox chemistry. In the photo-charged state, the fabricated battery has an open-circuit voltage of ∼0.28 V in the dark. With a series-connected pack of these batteries, an LED was lit for tens of seconds in the dark.