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Na Diffusion and Device Performance of AgBr Treated CuGaSe2 Thin Films

Conference · · 2022 IEEE 49th Photovoltaics Specialists Conference (PVSC)
 [1];  [2];  [2];  [2];  [1]
  1. Colorado School of Mines, Golden, CO (United States)
  2. Université de Nantes (France)

Previous work demonstrated that uniform CuGaSe2 (CGS) thin films with large grains could be grown using a short AgBr vapor treatment during growth. Here, devices made with this treated CGS showed better performance compared to devices made with standard material. Here, it is shown that AgBr treated CGS device performance worsens over time and is attributed to the suppression of Na diffusion. A NaF post-deposition treatment is shown to effectively introduce Na into the AgBr treated CGS film and prevent device degradation.

Research Organization:
Colorado School of Mines, Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; National Science Foundation (NSF)
DOE Contract Number:
EE0007551; 1726898
OSTI ID:
1991321
Journal Information:
2022 IEEE 49th Photovoltaics Specialists Conference (PVSC), Conference: 2022 IEEE 49. Photovoltaics Specialists Conference (PVSC), Philadelphia, PA (United States), 5-10 Jun 2022
Country of Publication:
United States
Language:
English

References (12)

Reaction kinetics study of CdTe thin films during CdCl2 heat treatment journal August 2011
Unveiling the effects of post-deposition treatment with different alkaline elements on the electronic properties of CIGS thin film solar cells journal January 2014
Improved CuGaSe2 absorber properties through a modified co-evaporation process journal September 2020
Detrimental copper-selenide bulk precipitation in CuIn1-xGaxSe2 thin-film solar cells. A possible reason for the limited performance at large x? journal October 2020
Efficiency enhancement of Cu(In,Ga)Se2 solar cells due to post-deposition Na incorporation journal February 2004
Atom probe study of Cu-poor to Cu-rich transition during Cu(In,Ga)Se 2 growth journal December 2011
Homogeneous CuGaSe2 growth by the CuPRO process with In-Situ AgBr treatment journal November 2022
Reaction kinetics of CuInSe2 thin films grown from bilayer InSe/CuSe precursors journal March 2005
Kinetics of the reactive crystallization of CuInSe2 and CuGaSe2 chalcopyrite films for solar cell applications journal January 2006
Cu(In,Ga)Se 2 thin films grown with a Cu-poor/rich/poor sequence: growth model and structural considerations: Cu(In,Ga)Se 2 THIN-FILM GROWTH journal July 2003
Reaction kinetics of CuGaSe2 formation from a GaSe/CuSe bilayer precursor film journal June 2008
Impact of Wide-Ranging Nanoscale Chemistry on Band Structure at Cu(In, Ga)Se2 Grain Boundaries journal October 2017

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