Elucidating the Roles of TiCl₄ and PCBM Fullerene Treatment on TiO₂ Electron Transporting Layer for Highly Efficient Planar Perovskite Solar Cells

• 摘要：

  With the fast development of the perovskite solar cell, its energy conversion efficiency has improved rapidly. In this paper, a CH₃NH₃PbI_3-xCl_x organic-inorganic perovskite solar cell (PSC) was successfully prepared by the one-step solvent engineering method, and the planar heterojunction perovskite solar cell was optimized by interface engineering of the cathode interlayers. It was found that TiCl₄ treatment could effectively reduce the TiO₂ surface roughness, decrease the surface defects, improve the perovskite thin film crystallinity, and reduce the charge carrier recombination; hence, the short-circuit current density of PSCs and charge extraction and collection efficiencies were enhanced. Furthermore, PC₆₀BM fullerene treatment could optimize the contact condition and reduce the interfacial potential loss. The device hysteresis effects after PCBM treatment were also reduced. The combination of TiCl₄ and PC₆₀BM treatments could largely improve the PSC device performance with a power conversion efficiency of 16.4% due to the synergetic effect.

• 作者：

  Jing Ma;Jingjing Chang;Zhenhua Lin;Xing Guo;Long Zhou;Ziye Liu;He Xi;Dazheng Chen;Chunfu Zhang;跃 郝

• 刊名：

  Journal of Physical Chemistry C

• 在线出版时间：

  2018-1-18