Fabrication of DSSC based on Capsicum annuum and Tamarindus indica plant seeds extract as natural photosensitizers

•Sustainable green sources for solar energy harvesting.•Capsicum annuum and Tamarindus indica as natural dyes for photosensitization.•Twelve different DSSCs configurations consist of ZnO films, electrodes, and natural dye sensitizers.•Choices of dye, electrode material, and nanoparticle film provide rich options to calculate different DSSC configurations' efficiencies.•DSSC based on Capsicum annuum (as a dye), zinc oxide (as a charge transporter), and graphite as an electrode have an efficiency of 1.65%.