Pyrite-Based Bi-Functional Layer for Long-Term Stability and High-Performance of Organo-Lead Halide Perovskite Solar Cells

Bonkee Koo, Heesuk Jung, Minwoo Park, Jae Yup Kim, Hae Jung Son, Jinhan Cho, Min Jae Ko

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

Organo-lead halide perovskite solar cells (PSCs) have received great attention because of their optimized optical and electrical properties for solar cell applications. Recently, a dramatic increase in the photovoltaic performance of PSCs with organic hole transport materials (HTMs) has been reported. However, as of now, future commercialization can be hampered because the stability of PSCs with organic HTM has not been guaranteed for long periods under conventional working conditions, including moist conditions. Furthermore, conventional organic HTMs are normally expensive because material synthesis and purification are complicated. It is herein reported, for the first time, octadecylamine-capped pyrite nanoparticles (ODA-FeS2 NPs) as a bi-functional layer (charge extraction layer and moisture-proof layer) for organo-lead halide PSCs. FeS2 is a promising candidate for the HTM of PSCs because of its high conductivity and suitable energy levels for hole extraction. A bi-functional layer based on ODA-FeS2 NPs shows excellent hole transport ability and moisture-proof performance. Through this approach, the best-performing device with ODA-FeS2 NPs-based bi-functional layer shows a power conversion efficiency of 12.6% and maintains stable photovoltaic performance in 50% relative humidity for 1000 h. As a result, this study has the potential to break through the barriers for the commercialization of PSCs.

Original languageEnglish
Pages (from-to)5400-5407
Number of pages8
JournalAdvanced Functional Materials
Volume26
Issue number30
DOIs
Publication statusPublished - 2016 Aug 9

Keywords

  • hole transport material
  • long-term stability
  • organo-lead halide perovskite solar cells
  • pyrite (FeS) nanoparticles
  • surface hydrophobicity

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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