Mitigating Iodine Diffusion by a MoO3-Organic Composite Hole Transport Layer for Stable Perovskite Solar Cells

Jisu Hong, Zhaojian Xu, Dominique Lungwitz, Jonathan Scott, Holly M. Johnson, Yun Hi Kim, Antoine Kahn, Barry P. Rand

Research output: Contribution to journalArticlepeer-review

Abstract

Halide perovskite solar cells (PSCs) exhibit commercialization potential, but long-term stability still must be addressed. Among various products of perovskite decomposition, iodine species are of considerable concern due to their high vapor pressure and corrosive nature. To address this, a small-molecule hole transport layer (HTL), 4,4′,4″-tris[(3-methylphenyl)phenylamino]triphenylamine (m-MTDATA), is used; mixing it with molybdenum trioxide (MoO3) p-dopes the layer and slows iodine permeation. We demonstrate that m-MTDATA:MoO3 HTLs employed in PSCs improve stability under both thermal and voltage bias stress compared to devices with a conventional doped 2,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene (spiro-OMeTAD) HTL.

Original languageEnglish (US)
Pages (from-to)4984-4992
Number of pages9
JournalACS Energy Letters
Volume8
Issue number12
DOIs
StatePublished - Dec 8 2023

All Science Journal Classification (ASJC) codes

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry

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