Li, X., Yu, H., Liu, Z., Huang, J., Ma, X., Liu, Y., Sun, Q., Dai, L., Ahmad, S., Shen, Y. and Wang, M. (2023) “Progress and Challenges Toward Effective Flexible Perovskite Solar Cells”, Nano-Micro Letters, 15, p. 206. doi: 10.1007/s40820-023-01165-8.