Acid Additives Enhancing the Conductivity of Spiro-OMeTAD Toward High-Efficiency and Hysteresis-Less Planar Perovskite Solar Cells

Zhen Li, Jonathan Tinkham, Philip Schulz, Mengjin Yang, Dong Hoe Kim, Joseph Berry, Alan Sellinger, Kai Zhu

Research output: Contribution to journalArticlepeer-review

135 Scopus Citations

Abstract

A general doping strategy, using a wide range of acids with different pKa values as additive, is demonstrated to enhance the conductivity of spiro-OMeTAD, the dominant hole transport material in perovskite solar cells (PSCs). Hysteresis-less planar PSCs with ~19% efficiency and better open-circuit voltage and fill factor is achieved with acid doped spiro-OMeTAD.
Original languageAmerican English
Article number1601451
Number of pages8
JournalAdvanced Energy Materials
Volume7
Issue number4
DOIs
StatePublished - 2017

NREL Publication Number

  • NREL/JA-5900-66721

Keywords

  • acids
  • doping
  • hole transport layer
  • perovskite solar cells

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