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

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

doi:10.1021/acsami.6b10898

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

Journal Article · Tue Nov 08 00:00:00 EST 2016 · ACS Applied Materials and Interfaces

DOI:https://doi.org/10.1021/acsami.6b10898· OSTI ID:1337615

Schulz, Philip ^[1]; Tiepelt, Jan O. ^[2]; Christians, Jeffrey A. ^[3]; Levine, Igal ^[4]; Edri, Eran ^[5]; Sanehira, Erin M. ^[6]; Hodes, Gary ^[4]; Cahen, David ^[4]; Kahn, Antoine ^[2]

Princeton Univ., Princeton, NJ (United States); National Renewable Energy Lab. (NREL), Golden, CO (United States)
Princeton Univ., Princeton, NJ (United States)
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Weizmann Institute of Science, Rehovot (Israel)
Weizmann Institute of Science, Rehovot (Israel); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
National Renewable Energy Lab. (NREL), Golden, CO (United States); Univ. of Washington, Seattle, WA (United States)

Here, 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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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1337615

Report Number(s):: NREL/JA-5K00-67634

Journal Information:: ACS Applied Materials and Interfaces, Vol. 8, Issue 46; ISSN 1944-8244

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 136 works

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