NGUYEN NGOC MINH; BUI VAN DAN; LUONG XUAN DIEN; PHAN SI NGUYEN; NGO DUC QUAN. EFFECT OF K-EXCESS ON ENERGY STORAGE DENSITY AND EFFICIENCY OF Bi0.5K0.5+xTiO3 FILMS. UTEHY Journal of Applied Science and Technology, v. 28, p. 91-96, 23 Apr. 2021.