Planar heterojunction perovskite solar cells via vapor-assisted solution process.

  title={Planar heterojunction perovskite solar cells via vapor-assisted solution process.},
  author={Qi Chen and Huanping Zhou and Z. R. Hong and Song Luo and Hsin-Sheng Duan and Hsin-Hua Wang and Yongsheng Liu and Gang Li and Yang Yang},
  journal={Journal of the American Chemical Society},
  volume={136 2},
Hybrid organic/inorganic perovskites (e.g., CH3NH3PbI3) as light absorbers are promising players in the field of third-generation photovoltaics. Here we demonstrate a low-temperature vapor-assisted solution process to construct polycrystalline perovskite thin films with full surface coverage, small surface roughness, and grain size up to microscale. Solar cells based on the as-prepared films achieve high power conversion efficiency of 12.1%, so far the highest efficiency based on CH3NH3PbI3… 

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