“PHOTODEGRADATION EFFECT ON OPTICAL PROPERTIES OF MANGOSTEEN PERICARP, BLACK GRAPE PEEL AND VIOLET BOUGAINVILLEA FLOWERS AS PHOTOSENSITIZER FOR SOLAR CELL APPLICATION ”. 2021. Jurnal Teknologi 83 (5): 109-17. https://doi.org/10.11113/jurnalteknologi.v83.16729.