Entire mirror-like perovskite films for high-performance perovskite solar cells: The role of polar anti-solvent sec-pentyl alcohol

Shiqi Li, Fan Zhang, Qinjun Sun, Zhanfeng Li, Yanxia Cui, Ting Ji, Wei Qin, Fu Rong ZHU, Yuying Hao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

High-quality perovskite films are essential for high-performance perovskite solar cells (PSCs). Here we first proposed a polar anti-solvent technology of sec-pentyl alcohol (2-PA) for the fabrication of perovskite films. Our investigations have proven that 2-PA, as a better anti-solvent than conventional those with non- and high-polarity, enables the fabrication of uniform and dense perovskite films with mirror-like surface and film-through large grains. We found that moderate polar solvent more advantageously influences the crystallinity and morphology of perovskite films by extracting thoroughly the residual solvent and promoting a more complete and fast transformation from the lead polyhalide framework to the targeted perovskite film. By our proposed way, the best performing PSCs based on methylammonium lead iodide showed a power conversion efficiency (PCE) of over 17% under AM 1.5G illumination with high reproducibility and no photocurrent hysteresis. Our investigation indicates that sec-pentyl alcohol as anti-solvent could be an universal method for the preparation of hybrid organic-inorganic perovskite film.

Original languageEnglish
Pages (from-to)133-139
Number of pages7
JournalOrganic Electronics
Volume57
DOIs
Publication statusPublished - Jun 2018

Scopus Subject Areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

User-Defined Keywords

  • Mirror-like perovskite films
  • Perovskite solar cells
  • Polarity anti-solvent engineering
  • Sec-pentyl alcohol

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