(This study was published in the online version of Science on October 29, 2015: W. Chen, Y. Wu, Y. Yue, J. Liu, W. Zhang, X. Yang, H. Chen, E. Bi, A. Islam, M. Gratzel and L. Han: Efficient and stable large-area perovskite solar cells with inorganic charge-extraction layers [DOI:
10.1126/science.aad1015]).