Analisa Kualitas Klorofil Dan Absorbansi Daun Jarak Merah (Jatropha Gossypifolia L.) Dan Daun Biduri (Calotropis Gigantea) Sebagai Bahan Pewarna Pada Dye Sensitized Solar Cell (DSSC) : Analysis of Chlorophyll Quality and Absorbance of Red Jatropha (Jatropha Gossypifolia L.) Leaves and Biduri Leaves (Calotropis Gigantea) As Dye Sensitized Solar Cells (DSSC) . Gravitasi 2021, 20 (2), 47-50. https://doi.org/10.22487/gravitasi.v20i2.15734.