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

166 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
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 - 23 Nov 2016
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2016 American Chemical Society.

Funding

A.K. and D.C. thank the US-Israel Binational Science Foundation (Jerusalem) for partial support. Work at Princeton University was further supported by a grant of the National Science Foundation (DMR-1005892). P.S. and J.A.C. were supported by the hybrid perovskite solar cell program of the National Center for Photovoltaics funded by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Office of Solar Energy Technology under Award DE-AC36-08GO28308DOE with the National Renewable Energy Laboratory (NREL). The Weizmann Institute authors also thank the Leona M. Harry B. Helmsley Charitable Trust, the Israel National Nano-Initiative, the Israel Ministry of Science, and the Nancy Stephen Grand Center for Sensors Security for support. E.M.S. was supported by a NASA Space Technology Research Fellowship.

Funders	Funder number
Israel Ministry of Science
Nancy Stephen Grand Center for Sensors Security
National Center for Photovoltaics
Office of Solar Energy Technology	DE-AC36-08GO28308DOE
National Science Foundation	DMR-1005892
U.S. Department of Energy
National Aeronautics and Space Administration
Office of Energy Efficiency and Renewable Energy
National Renewable Energy Laboratory
Leona M. and Harry B. Helmsley Charitable Trust
United States-Israel Binational Science Foundation

Keywords

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

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/acsami.6b10898

Cite this

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

Abstract

Bibliographical note

Funding

Keywords

UN SDGs

Access to Document

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