Design of Perovskite Nanowire Solar Cells with an Adjustable Transmission Visible Light Spectrum

Translucent film solar cells have significant applications in various scenarios, indicating strong potential for application. However, translucent film solar cells typically only regulate the transmitted light intensity and cannot flexibly adjust the transmission wavelength. Here, a perovskite nanowire (PNW) solar cell that utilizes the light capture performance of a single nanowire to achieve flexible wavelength adjustment in the visible light range was designed. The characteristic scale of a PNW enables the adjustment of absorption coefficients (<i>Q</i>_abs) at different wavelengths, combined with the constraint relationship among reflectivity, absorptivity, and transmissivity, to adjust the wavelength of the transmittance spectrum of the solar cell. In addition, the PNW light capture effect increases the open circuit voltage (<i>V</i>_OC) by about 5%. Finally, the light transmitted by PNW solar cells can vary among yellow, red, and purple, and the highest PCE can be maintained at around 20%, which enhances the application of transparent solar cells.