High performance fiber-shaped perovskite solar cells based on lead acetate precursor

Research on perovskite solar cells is currently at a high level of activity and many types of special solar architectures have been derived. The fiber-shaped perovskite solar cell (FPSC) is one very important type of these architectures, as it could be a potential power source of portable/wearable electronics. For the first time, we introduce lead acetate as the lead source to improve the perovskite film morphology on highly curved fiber substrates and then enhance the FPSC performance. A large grain size and uniform perovskite film could be obtained via a simple dip-coating process. The FPSCs achieved a PCE of 7.53% and V OC of 0.96 V under AM 1.5 illumination. This non-halide lead source could promote the development of efficient and large-sized devices with solid fiber solar cells.