Stabilized Preparation of Fiber-Shaped Perovskite Solar Cells with Ti and Graphene Substrates

Abstract

Organic−inorganic hybrid metal halide perovskite solar cells (PSCs) have made dramatic progress over the past few years. Fiber-shaped PSCs (FPSCs) extend the application of PSCs to wearable and portable electronics. The onedimensional flexible structure of the fiber substrate and the high efficiency photoelectric conversion ability of the perovskite materials make FPSCs promising for energy applications. However, FPSCs have limited preparation methods and show poorer optoelectronic performance compared to conventional PSCs. In our work, we present a multiple quantitative coating preparation method, which was optimized by controlling the PbI 2 concentration and the cycle number of coating process. We demonstrated the effectiveness of the methods in improving the film performance, with a photoelectric conversion efficiency (PCE) of 5.2% under air. The applicability of the multiple quantitative coating methods was studied by the FPSCs fabricated on reduced graphene fibers (rGFs), which present PCEs of about 1.5%. In addition, by extending the length of rGFs, the device performance was further improved. Thus, we demonstrated a stable fabrication method of FPSCs based on rGFs, which exhibited significant potential for using PSCs as a power source in wearable devices.

Performance enhancement strategies of fibrous solar cells for wearable hybrid energy systems

“…Mei et al fabricated FPSCs on titanium wires through a stable and economical two-step coating method. 141 By controlling the concentration of PbI 2 and the number of coating cycles, uniform perovskite films can be prepared by this method, and the PCE of FPSCs in air is 5.2%.…”