Back-contact perovskite solar cells with honeycomb-like charge collecting electrodes

Qicheng Hou, Dorota Bacal, Askhat N. Jumabekov, Wei Li, Ziyu Wang, Xiongfeng Lin, Soon Hock Ng, Boer Tan, Qiaoliang Bao, Anthony S.R. Chesman, Yi Bing Cheng, Udo Bach

Research output: Contribution to journalArticleResearchpeer-review

16 Citations (Scopus)

Abstract

Back-contact electrodes have been broadly applied to silicon photovoltaics to enhance their performance and avoid parasitic absorption from window materials and charge collection grids [1,2]. Here we introduce an innovative back-contact design for perovskite solar cells (PSCs) derived from our recently described quasi-interdigitated back-contact architecture [3]. The back contact consists of a top electrode, which has a honeycomb-like grid geometry, that is separated from the underlying planar bottom electrode by a similarly shaped insulating Al 2 O 3 layer. This new design has higher structural robustness, as well as better defect tolerance, resulting in the highest short-circuit current (~ 16.4 mA/cm 2 ) and stabilized power output (~ 4%) for a back-contact PSC to date. The improved performance was attributed to an increased charge collecting efficiency, with photocurrent mapping revealing what electrode dimensions are required for optimum efficiency.

Original languageEnglish
Pages (from-to)710-716
Number of pages7
JournalNano Energy
Volume50
DOIs
Publication statusPublished - 1 Aug 2018

Keywords

  • Back-contact
  • Honeycomb-shape
  • Perovskite solar cells
  • Photolithography
  • Quasi-interdigitated electrodes

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