High-work-function molybdenum oxide hole extraction contacts in hybrid organic-inorganic perovskite solar cells

Philip Schulz; Jan O. Tiepelt; Jeffrey A. Christians; Igal Levine; Eran Edri; Erin M. Sanehira; Gary Hodes; David Cahen; Antoine Kahn

doi:10.1021/acsami.6b10898

High-work-function molybdenum oxide hole extraction contacts in hybrid organic-inorganic perovskite solar cells

Philip Schulz, Jan O. Tiepelt, Jeffrey A. Christians, Igal Levine, Eran Edri, Erin M. Sanehira, Gary Hodes, David Cahen, Antoine Kahn

Research output: Contribution to journal › Article › peer-review

164 Scopus citations

Abstract

We investigate the effect of high work function contacts in halide perovskite absorber-based photovoltaic devices. Photoemission spectroscopy measurements reveal that band bending is induced in the absorber by the deposition of the high work function molybdenum trioxide (MoO₃). We find that direct contact between MoO₃ and the perovskite leads to a chemical reaction, which diminishes device functionality. Introducing an ultrathin spiro-MeOTAD buffer layer prevents the reaction, yet the altered evolution of the energy levels in the methylammonium lead iodide (MAPbI₃) layer at the interface still negatively impacts device performance.

Original language	English (US)
Pages (from-to)	31491-31499
Number of pages	9
Journal	ACS Applied Materials and Interfaces
Volume	8
Issue number	46
DOIs	https://doi.org/10.1021/acsami.6b10898
State	Published - Nov 23 2016

All Science Journal Classification (ASJC) codes

General Materials Science

Keywords

band offsets
charge carrier transport
electronic structures/processes/mechanisms
hybrid materials
photoemission spectroscopy
photovoltaic devices

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10.1021/acsami.6b10898

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title = "High-work-function molybdenum oxide hole extraction contacts in hybrid organic-inorganic perovskite solar cells",

abstract = "We investigate the effect of high work function contacts in halide perovskite absorber-based photovoltaic devices. Photoemission spectroscopy measurements reveal that band bending is induced in the absorber by the deposition of the high work function molybdenum trioxide (MoO3). We find that direct contact between MoO3 and the perovskite leads to a chemical reaction, which diminishes device functionality. Introducing an ultrathin spiro-MeOTAD buffer layer prevents the reaction, yet the altered evolution of the energy levels in the methylammonium lead iodide (MAPbI3) layer at the interface still negatively impacts device performance.",

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AU - Levine, Igal

AU - Edri, Eran

AU - Sanehira, Erin M.

AU - Hodes, Gary

AU - Cahen, David

AU - Kahn, Antoine

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KW - electronic structures/processes/mechanisms

KW - hybrid materials

KW - photoemission spectroscopy

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High-work-function molybdenum oxide hole extraction contacts in hybrid organic-inorganic perovskite solar cells

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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