Characteristics of Perovskite Solar Cells with ZnGa2O4:Mn Phosphor Mixed Polyvinylidene Fluoride Down-Conversion Layer

Abstract

To reduce the manufacturing cost of perovskite solar cells, soda-lime glass and transparent conducting oxides such as indium tin oxide and fluorine-doped tin oxide are the most widely used substrates and light transmitting electrodes. However, the transmittance spectra of soda-lime glass, indium tin oxide, and fluorine doped tin oxide show that all light near and below 330 nm is absorbed; thus, with the use of these substrates, light energy near and below 330 nm cannot reach the perovskite light-absorbing layer. It is expected that the overall solar cell can be improved if the wavelength can be adjusted to reach the perovskite solar cell absorbing layer through down-conversion of energy in the optical wavelength band. In this study, a polyvinylidene fluoride transparent film mixed with a ZnGa2O4:Mn phosphor was applied to the incident side of the perovskite solar cell with the intent to increase the light conversion efficiency without changing the internal bandgap energy and structure. By adding a phosphor layer to the external surface of PSC exposed to incident light, the efficiency of the cellwas increased by the down-conversion of ultraviolet light (290 nm) to the visible IP: 49 249 253 194 On: Tue 28 Dec 2021 12:33:25 region (509 nm) while maintainingthe tansmittance. To mauactre tperovskite solar cell, a TiO2-based mesoporous electron transport layer was spin-coatonto the substrate. The perovskite layer used in this Delivered by Ingenta experiment was CH3NH3PbI3 and was fabricated on a TiO2 layer. Spiro-OMeTAD solution was spin-coated as a hole-transport layer.