@article{a07c5332ad60432a961313c207f6c1df,
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.",
keywords = "band offsets, charge carrier transport, electronic structures/processes/mechanisms, hybrid materials, photoemission spectroscopy, photovoltaic devices",
author = "Philip Schulz and Tiepelt, {Jan O.} and Christians, {Jeffrey A.} and Igal Levine and Eran Edri and Sanehira, {Erin M.} and Gary Hodes and David Cahen and Antoine Kahn",
note = "Funding Information: 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. Publisher Copyright: {\textcopyright} 2016 American Chemical Society.",
year = "2016",
month = nov,
day = "23",
doi = "10.1021/acsami.6b10898",
language = "English (US)",
volume = "8",
pages = "31491--31499",
journal = "ACS applied materials & interfaces",
issn = "1944-8244",
publisher = "American Chemical Society",
number = "46",
}