Solar cells and photovoltaic modules

Abstract

This utility model relates to the field of photovoltaic product technology, specifically solar cells and photovoltaic modules, including a cell body with electrodes disposed at the bottom of the cell body. The cell body includes a substrate layer, which is fluorine-doped tin dioxide (FTO). A substrate layer is formed on the substrate layer, which is a high-roughness NP-FTO substrate prepared by micro-nano processing. A conformal SnO2 layer is grown on the substrate layer using atomic layer deposition (ALD) technology. A SnO2 electron transport layer is superimposed on the conformal SnO2 layer. The conformal SnO2 layer and the SnO2 electron transport layer form a full SnO2 homojunction interface. A perovskite light-absorbing layer is finally deposited on the full SnO2 homojunction interface. The substrate layer and the perovskite light-absorbing layer form an interleaved structure, constructing a natural gradient refractive index optical system. This utility model can solve the reflection loss problem of traditional flat substrates when the light is tilted by more than 40°, improve carrier mobility, and reduce non-radiative recombination rate.

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