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Synthesis and surface chemistry of Zn_3P_2

Kimball, Gregory M. and Lewis, Nathan S. and Atwater, Harry A. (2008) Synthesis and surface chemistry of Zn_3P_2. In: 33rd IEEE Photovolatic Specialists Conference. IEEE , Piscataway, NJ. ISBN 978-1-4244-1640-0. https://resolver.caltech.edu/CaltechAUTHORS:20170405-165832245

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Abstract

Zinc phosphide (Zn_3P_2) is a promising alternative to traditional materials (e.g. CIGS, CdTe, a-Si) for thin film photovoltaics. Open circuit voltage in Zn_3P_2 cells has been limited by Fermi-level pinning due to surfaces states and heterojunction interdiffusion, motivating the need to prepare interfaces that are electrically passive and chemically inert. We investigated the surface chemistry of Zn_3P_2 via etching with bromine in methanol and passivation with ammonium sulfide in t-butanol. The treatment decreases surface oxidation as determined by x-ray photoelectron spectroscopy and provides a stable, low-defect interface as monitored by steady-state photoluminescence. Magnesium Schottky diodes fabricated with sulfur-passivated interfaces show evidence of enhanced barrier heights in comparison to control devices.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1109/PVSC.2008.4922747DOIPaper
http://ieeexplore.ieee.org/document/4922747/PublisherPaper
ORCID:
AuthorORCID
Lewis, Nathan S.0000-0001-5245-0538
Atwater, Harry A.0000-0001-9435-0201
Additional Information:© 2008 IEEE. This work was supported by the Office of Energy Efficiency and Renewable Energy, US Department of Energy under grant DE-FG36-08G018006. One of us (GMK) acknowledges support under an NDSEG graduate fellowship. We also acknowledge use of facilities supported by the Center for Science and Engineering of Materials, an NSF MRSEC.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG36-08G018006
National Defense Science and Engineering Graduate (NDSEG) FellowshipUNSPECIFIED
NSFUNSPECIFIED
Record Number:CaltechAUTHORS:20170405-165832245
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170405-165832245
Official Citation:G. M. Kimball, N. S. Lewis and H. A. Atwater, "Synthesis and surface chemistry of Zn3P2," 2008 33rd IEEE Photovoltaic Specialists Conference, San Diego, CA, USA, 2008, pp. 1-6. doi: 10.1109/PVSC.2008.4922747
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75760
Collection:CaltechAUTHORS
Deposited By: Kristin Buxton
Deposited On:06 Apr 2017 16:27
Last Modified:03 Oct 2019 16:53

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