Uniform Permutation of Quasi-2D Perovskites by Vacuum Poling for Efficient, High-Fill-Factor Solar Cells

Jia Zhang, Jiajun Qin, Miaosheng Wang, Yujie Bai, Han Zou, Jong Kahk Keum, Runming Tao, Hengxing Xu, Haomiao Yu, Stefan Haacke, Bin Hu

Research output: Contribution to journalArticlepeer-review

195 Scopus citations

Abstract

It is widely accepted that vertically aligning quasi-2D perovskites can improve power conversion efficiency due to directional charge transport from small to large-n-value nanoplates. Here, we report a different strategy of uniformly arranging different-n-value 2D nanoplates (PEA2MAn-1PbnI3n+1) based on our vacuum poling method to enable superior isotropic carrier transport. Consequently, the high efficiency of 18.04% with open-circuit voltage of 1.223 V and champion fill-factor (FF) of 82.4% are demonstrated, presenting a new approach to develop advanced quasi-2D perovskite optoelectronic devices.

Original languageEnglish
Pages (from-to)3061-3071
Number of pages11
JournalJoule
Volume3
Issue number12
DOIs
StatePublished - Dec 18 2019

Funding

The authors at the University of Tennessee acknowledge funding support from the Air Force Office of Scientific Research (AFOSR) under the grant number FA 9550-15-1-0064 , AOARD ( FA2386-15-1-4104 ), and National Science Foundation ( NSF-1911659 ). This research was partially performed at the Center for Nanophase Materials Sciences based on user projects ( CNMS2017-102 ), which is sponsored by Oak Ridge National Laboratory by the Division of Scientific User Facilities, U.S. Department of Energy .

Keywords

  • 2D nanoplates
  • carrier extraction
  • high efficiency
  • high fill factor
  • perovskite solar cells
  • quasi-2D perovskites
  • uniform dispersion
  • vacuum poling treatment

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