Fully Solution-Processed TCO-Free Semitransparent Perovskite Solar Cells for Tandem and Flexible Applications

Yaokang Zhang, Zhongwei Wu, Peng Li, Luis K. Ono, Yabing Qi, Jixiang Zhou, Hui Shen, Charles Surya, Zijian Zheng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

92 Citations (Scopus)


Semitransparent perovskite solar cells (st-PSCs) have received remarkable interest in recent years because of their great potential in applications for solar window, tandem solar cells, and flexible photovoltaics. However, all reported st-PSCs require expensive transparent conducting oxides (TCOs) or metal-based thin films made by vacuum deposition, which is not cost effective for large-scale fabrication: the cost of TCOs is estimated to occupy ≈75% of the manufacturing cost of PSCs. To address this critical challenge, this study reports a low-temperature and vacuum-free strategy for the fabrication of highly efficient TCO-free st-PSCs. The TCO-free st-PSC on glass exhibits 13.9% power conversion efficiency (PCE), and the four-terminal tandem cell made with the st-PSC top cell and c-Si bottom cell shows an overall PCE of 19.2%. Due to the low processing temperature, the fabrication of flexible st-PSCs is demonstrated on polyethylene terephthalate and polyimide, which show excellent stability under repeated bending or even crumbing.

Original languageEnglish
Article number1701569
JournalAdvanced Energy Materials
Issue number1
Publication statusPublished - 5 Jan 2018


  • perovskite solar cells
  • semitransparent solar cells
  • solution processing
  • tandem solar cells
  • TCO-free solar cells

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • General Materials Science


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