Facile Fabrication of SnO2 Nanorod Arrays Films as Electron Transporting Layer for Perovskite Solar Cells

Yinhua Lv, Peng Wang, Bing Cai, Qingshan Ma, Xiaojia Zheng, Yihui Wu, Qike Jiang, Jingyue Liu, Wen Hua Zhang

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

As the vital competent in high performance perovskite solar cells (PSCs), the inorganic metal oxide electron transporting materials (ETMs) with tailored architectures are responsible for extracting and transporting photogenerated electrons and preventing the recombination effectively. Here, a facile hydrothermal method is demonstrated for the growth of highly crystalline and uniform 1D SnO2 nanorod arrays (SR) with excellent optical property, which are further successfully exploited as ETMs in PSCs. Both length and diameter of 1D SR are tuned carefully by optimizing the hydrothermal process. Power conversion efficiency (PCE) as high as 16.7% can be obtained for PSCs based on these SR. Furthermore, a graded heterojunction (GHJ) configuration was built by intercalating a TiO2 thin interlayer to improve the band alignment between perovskite and SR, which pushes the PCE to 18.7% with better ambient stability. This work demonstrates that the SR can act as a promising candidate for ETM in PSCs, and provides a workable stategy to improve the performance of PSCs.

Original languageEnglish (US)
Article number1800133
JournalSolar RRL
Volume2
Issue number9
DOIs
StatePublished - Sep 1 2018

Keywords

  • 1D SnO nanorod arrays
  • electron transporting materials
  • graded heterojunction
  • interface engineering
  • perovskite solar cells

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Energy Engineering and Power Technology
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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    Lv, Y., Wang, P., Cai, B., Ma, Q., Zheng, X., Wu, Y., Jiang, Q., Liu, J., & Zhang, W. H. (2018). Facile Fabrication of SnO2 Nanorod Arrays Films as Electron Transporting Layer for Perovskite Solar Cells. Solar RRL, 2(9), [1800133]. https://doi.org/10.1002/solr.201800133