Wang, X., Wang, L., Shan, T., Leng, S., Zhong, H., Bao, Q., Lu, Z., Deng, L. and Chen, C. (2020) “Low-Temperature Aging Provides 22% Efficient Bromine-Free and Passivation Layer-Free Planar Perovskite Solar Cells”, Nano-Micro Letters, 12, p. 84. doi: 10.1007/s40820-020-00418-0.