K. Do-Dinh, T. D. Nguyen, T. V. Phan-Vu, C. H. Hoang, T. T. Truong and T. Nguyen-Tran, Fabrication for formamidinium lead bromide perovskite for light emission, Comm. Phys. 34 (2024) 75. DOI: https://doi.org/10.15625/0868-3166/18578.