Highly compact CsPbBr3 perovskite film decorated by PEO for light-emitting diodes Shulv Zhang, Yuhang Yin, Weiling Luan and Mengke Liu E3S Web Conf., 53 (2018) 01035 Published online: 14 September 2018 DOI: 10.1051/e3sconf/20185301035