Sia, Rachael, Wan Lyn, et al. “Investigation on Thermally Evaporated Aluminium Contact Layers for Perovskite Solar Cell Applications”. International Journal of Integrated Engineering, vol. 16, no. 3, Apr. 2024, pp. 28-35, https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/15832.