Morphological Control for High Performance, Solution‐Processed Planar Heterojunction Perovskite Solar Cells

  title={Morphological Control for High Performance, Solution‐Processed Planar Heterojunction Perovskite Solar Cells},
  author={Giles E. Eperon and Victor M. Burlakov and Pablo Docampo and Alain Goriely and Henry J. Snaith},
  journal={Advanced Functional Materials},
Organometal trihalide perovskite based solar cells have exhibited the highest efficiencies to‐date when incorporated into mesostructured composites. However, thin solid films of a perovskite absorber should be capable of operating at the highest efficiency in a simple planar heterojunction configuration. Here, it is shown that film morphology is a critical issue in planar heterojunction CH3NH3PbI3‐xClx solar cells. The morphology is carefully controlled by varying processing conditions, and it… 
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