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An additive dripping technique using diphenyl ether fortuning perovskite crystallization for high-efficiency solar cells

  • [设施]:北京正负电子对撞机
  • [期刊/会议名称]:Nano Research
  • [摘要]:Controlling the morphology of the MAPbI3−x Cl x active layer has remained a challenge towards advancing perovskite solar cells (PvSCs). Here, we demonstrate that a low temperature additive dripping (AD) treatment step, using diphenyl ether (DPE), can significantly improve the power conversion efficiency (PCE), compared to the control device using chlorobenzene (CB), by 15% up to 16.64%, with a high current density (JSC) of 22.67 mA/cm2. We chose DPE for its small and appropriate dipole moment to adjust the solubility of the MAPbI3−x Cl x precursor during the formation of the intermediate phase and the MAPbI3−x Cl x phase. The low DPE vapor pressure provides a longer processing window for the removal of residual dimethylformamide (DMF), during the annealing process, for improved perovskite formation. Imaging and X-ray analysis both reveal that the MAPbI3−x Cl x film exhibits enlarged grains with increased crystallinity. Together, these improvements result in reduced carrier recombination and hole trap-state density in the MAPbI3−x Cl x film, while minimizing the hysteresis problem typical of PvSCs. These results show thatthe AD approach is a promising technique for improving PvSCs.
  • [发表日期]:2017
  • [第一作者]:Di Huang
  • [第一作者单位]:Key Laboratory of Luminescence and Optical Information (Beijing Jiaotong University), Ministry of Education
  • [通讯作者]:Zheng Xu
  • [通讯作者单位]:Key Laboratory of Luminescence and Optical Information (Beijing Jiaotong University), Ministry of Education
  • [论文类型]:0
  • [期刊分类]:SCI2区
  • [学科分类]:物理
  • [影响因子]:7.354
  • [关键词]:perovskite solar cells additive dripping crystallinity DPE
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