Honeycomb-shaped charge collecting electrodes for dipole-assisted back-contact perovskite solar cells

Xiongfeng Lin, Sonia R. Raga, Anthony S.R. Chesman, Qingdong Ou, Liangcong Jiang, Qiaoliang Bao, Jianfeng Lu, Yi-Bing Cheng, Udo Bach

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8 Citations (Scopus)


Dipole-field-assisted charge-transporting-material-free lead halide perovskite solar cells (PSCs) using a back-contact configuration feature intrinsic advantages, such as no parasitic light absorption and high architectural defect tolerance. Herein, a newly designed, highly defect tolerant honeycomb-shaped back-contact (HBC) electrode was incorporated into dipole-field-assisted-back-contact PSCs, aiming to optimize the charge transport distance before being collected by the electrodes. HBC-PSCs with three feature sizes were fabricated in order to understand the effect of charge transport distance on device performance. The photovoltaic performance of HBC-PSCs correlates inversely proportional to the feature sizes. The mechanism behind the performance difference is elucidated via a detailed analysis through device current voltage characterization, transient photovoltage decay measurement and photocurrent mapping. A comprehensive comparison between honeycomb-shaped and interdigitated finger back-contact electrodes for PSCs is also conducted.

Original languageEnglish
Article number104223
Number of pages8
JournalNano Energy
Publication statusPublished - Jan 2020


  • Charge transport distance
  • Honeycomb-shaped back-contact electrodes
  • Perovskite solar cells
  • Surface modification

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