Fig. 13.

Schematic cross sections of a perovskite solar cell with integrated moth eye textures. a An aluminum contact with a moth eye texture is formed and all subsequent layers of the solar cell are formed on the textured metal contact. Hence, all layers of the solar cell exhibit a moth eye texture. c A moth eye textured interlayer is form on a flat or planar aluminum reflector. All layers are formed on the moth eye texturized interlayer. Hence, all layers except the aluminum back contact exhibits a moth eye texture, and b, d corresponding power density maps for an incident wavelength of 750 nm. Periods and heights of the moth eye structures are 150 and 200 nm, respectively. e Comparison of calculated quantum efficiency and optical loss of the metal back contact, and f comparison of absorbance for perovskite solar cells with and without integrated moth eye texture