Nanoscale hybrid multidimensional perovskites with alternating cations for high performance photovoltaic

Hao Gu, Chao Liang, Yingdong Xia, Qi Wei, Tanghao Liu, Yingguo Yang, Wei Hui, Haoran Chen, Tingting Niu, Lingfeng Chao, Zhiheng Wu, Xiaoji Xie, Jian Qiu, Guosheng Shao, Xingyu Gao, Guichuan Xing, Yonghua Chen*, Wei Huang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Two-dimensional (2D) metal-halide perovskites with alternating cations in the interlayer space (ACI) have demonstrated great potential in photovoltaics. The balance between stability and efficiency could be tailored by varying the distance between the inorganic slabs. However, the efficiencies are still low due to the low carrier mobility and random crystal orientation in the defective ACI films. Furthermore, how the ACI multidimensional perovskites assembled in the solution-processed film is still unclear. Herein, we demonstrated nanoscale hybrid multidimensional (GA)(MA)3Pb3I10 ACI (guanidinium = GA, methylammonium = MA) perovskite with vertically stacked microcrystals and preferential crystal orientation. In each microcrystal, the low-dimensional ACI are assembled within 3D perovskite nanoscale networks. Such nanoscale heterojunctions prompt ultrafast (~0.3 ps) charge carrier localization from ACI to 3D perovskite and the subsequent efficient charge carrier extraction from the 3D networks to the extraction layers. Based on optimized ACI films, record high-efficiency (>16%) and high-stability planar perovskite cells are achieved. Our results provide new insight into the crystal growth and carrier kinetics of the ACI perovskite solar cells.

Original languageEnglish
Article number104050
JournalNano Energy
Volume65
DOIs
Publication statusPublished - Nov 2019

Scopus Subject Areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

User-Defined Keywords

  • ACI perovskite
  • Multiphase stacked
  • Orientation growth
  • Ultrafast carrier transfer

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