High-Efficiency Perovskite Solar Cells Enabled by Anatase TiO2 Nanopyramid Arrays with an Oriented Electric Field

Yinhua Lv, Ruihan Yuan, Bing Cai, Behzad Bahrami, Ashraful Haider Chowdhury, Chi Yang, Yihui Wu, Qiquan Qiao, Shengzhong Liu, Wen Hua Zhang

Research output: Contribution to journalArticlepeer-review

80 Scopus citations


One-dimensional (1D) nanostructured oxides are proposed as excellent electron transport materials (ETMs) for perovskite solar cells (PSCs); however, experimental evidence is lacking. A facile hydrothermal approach was employed to grow highly oriented anatase TiO2 nanopyramid arrays and demonstrate their application in PSCs. The oriented TiO2 nanopyramid arrays afford sufficient contact area for electron extraction and increase light transmission. Moreover, the nanopyramid array/perovskite system exhibits an oriented electric field that can increase charge separation and accelerate charge transport, thereby suppressing charge recombination. The anatase TiO2 nanopyramid array-based PSCs deliver a champion power conversion efficiency of approximately 22.5 %, which is the highest power conversion efficiency reported to date for PSCs consisting of 1D ETMs. This work demonstrates that the rational design of 1D ETMs can achieve PSCs that perform as well as typical mesoscopic and planar PSCs.

Original languageEnglish (US)
Pages (from-to)11969-11976
Number of pages8
JournalAngewandte Chemie - International Edition
Issue number29
StatePublished - Jul 13 2020
Externally publishedYes


  • 1D nanostructures
  • anatase TiO
  • electric field distribution
  • nanopyramid arrays
  • power conversion efficiency

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry


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