(The study was published in
Advanced Materials on July 14, 2015: J. Liu, Y. Shirai, X. Yang, Y. Yue, W. Chen, Y. Wu, A. Islam and L. Han: High-quality mixed-organic-cation perovskites from a phase-pure non-stoichiometric intermediate (FAI)
1—xPbI
2 for Solar Cells, DOI:
10.1002/adma.201501489.)