Bahtiar A, Habibie K. THE STABILITY STUDIES OF MIXED HALIDE PEROVSKITE CH3NH3PbBrXI3-X THIN FILMS IN AMBIENT WITH AIR HUMIDITY 70% USING UV-VIS SPECTROSCOPY AND X-RAY DIFFRACTION. SPEKTRA [Internet]. 2020 Aug. 31 [cited 2024 Nov. 24];5(2):109-18. Available from: https://journal.unj.ac.id/unj/index.php/spektra/article/view/16310