LAUSR

Abstract The modulation of the organic Fabry-Perot electrodes was considered to develop the selective color-gamut perovskite (PVK) solar cells, and the solution-based processes were used to develop large, rapid and economic colorful solar cells referred to as building-integrated photovoltaic (BIPV) systems. An planar p-i-n perovskite solar cell structure of ITO/PEDOT:PSS/PVK/PCBM/Ag/PCBM/Ag were synthesized with different precursor concentrations ranging from 0.75, 1, 1.25, 1.5, to 1.75 M. The selective color-gamut for Fabry-Perot electrodes was simulated with different thickness of n-type PCBM and p-type PEDOT:PSS. The results showed that the surface coverage increased from 48.91% to 54.47% when the precursor concentration increased from 0.75 to 1.5 M. However, the surface coverage reduced to 47.05% when the precursor concentration was 1.75 M. The color gamut of the PCBM cavity was more reddish than that of PEDOT:PSS cavity in the CIE1931 colorimetric diagram, and the color gamut could be modulated with blue and green colors for PCBM and PEDOT:PSS cavities, respectively. Interestingly, although p-type PEDOT:PSS causes danger to the hydrolysis, n-type PCBM is suitable for spin coating, and the conversion gain could be enhanced to 122, 118 and 123% for the brown, yellow and red colors, respectively.