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Title: In situ optical diagnostic for monitoring or control of sodium diffusion in photovoltaics manufacturing

A method of fabricating a photovoltaic device 100, includes the steps of providing a glass substrate 102, depositing a molybdenum layer 104 on a surface of the glass substrate, directing light through the glass substrate to the near-substrate region of the molybdenum layer 206, detecting an optical property of the near-substrate region of the molybdenum layer after interaction with the incident light 208 and determining a density of the near-substrate region of the molybdenum layer from the detected optical property 210. A molybdenum deposition parameter may be controlled based upon the determined density of the near-substrate region of the molybdenum layer 218. A non-contact method measures a density of the near-substrate region of a molybdenum layer and a deposition chamber 300.
Inventors:
; ; ;
Issue Date:
OSTI Identifier:
1214585
Assignee:
Alliance For Sustainable Energy, LLC (Golden, CO) NREL
Patent Number(s):
9,136,184
Application Number:
14/112,033
Contract Number:
AC36-08GO28308
Resource Relation:
Patent File Date: 2012 Feb 17
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY

Works referenced in this record:

Progress toward 20% efficiency in Cu(In,Ga)Se2 polycrystalline thin-film solar cells
journal, July 1999

Development of CZTS-based thin film solar cells
journal, February 2009
  • Katagiri, Hironori; Jimbo, Kazuo; Maw, Win Shwe
  • Thin Solid Films, Vol. 517, Issue 7, p. 2455-2460
  • DOI: 10.1016/j.tsf.2008.11.002

Effect of sodium diffusion on the structural and electrical properties of Cu2ZnSnS4 thin films
journal, March 2011
  • Prabhakar, Tejas; Jampana, Nagaraju
  • Solar Energy Materials and Solar Cells, Vol. 95, Issue 3, p. 1001-1004
  • DOI: 10.1016/j.solmat.2010.12.012

Sputtered molybdenum bilayer back contact for copper indium diselenide-based polycrystalline thin-film solar cells
journal, May 1995