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Title: Large metastability in Cu (In,Ga)Se 2 devices: The importance of buffer properties

Abstract

Some commercial Cu (In,Ga)Se 2 (CIGS) modules reveal large changes in current-voltage parameters with light soaking. While such changes are not necessarily indicative of a performance problem, the associated uncertainty may be disadvantageous in a highly competitive market. Thus, it is beneficial to understand the origin of large metastabilities in order to define what processing changes might diminish metastability without impacting other desirable aspects of high-performance devices. This report attempts to reproduce large metastabilities like those in some commercial products both through absorber and buffer processing variations in small devices. While variations of both types were found to affect metastability, only buffer variations could reproduce large metastability in high-efficiency devices. Device modeling validates that buffer effects alone are sufficient to explain the large metastability seen in these devices.

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [1];  [1]; ORCiD logo [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)
OSTI Identifier:
1543253
Alternate Identifier(s):
OSTI ID: 1529678
Report Number(s):
NREL/JA-5K00-72573
Journal ID: ISSN 1062-7995
Grant/Contract Number:  
AC36-08GO28308; DE‐AC36‐ 08GO28308
Resource Type:
Accepted Manuscript
Journal Name:
Progress in Photovoltaics
Additional Journal Information:
Journal Volume: 27; Journal Issue: 9; Journal ID: ISSN 1062-7995
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; buffer; CdS; CIGS; light soak; metastable

Citation Formats

Repins, Ingrid, Glynn, Stephen, Silverman, Timothy J., Garris, Rebekah, Bowers, Karen, Stevens, Bart, and Mansfield, Lorelle. Large metastability in Cu (In,Ga)Se2 devices: The importance of buffer properties. United States: N. p., 2019. Web. doi:10.1002/pip.3145.
Repins, Ingrid, Glynn, Stephen, Silverman, Timothy J., Garris, Rebekah, Bowers, Karen, Stevens, Bart, & Mansfield, Lorelle. Large metastability in Cu (In,Ga)Se2 devices: The importance of buffer properties. United States. doi:10.1002/pip.3145.
Repins, Ingrid, Glynn, Stephen, Silverman, Timothy J., Garris, Rebekah, Bowers, Karen, Stevens, Bart, and Mansfield, Lorelle. Wed . "Large metastability in Cu (In,Ga)Se2 devices: The importance of buffer properties". United States. doi:10.1002/pip.3145.
@article{osti_1543253,
title = {Large metastability in Cu (In,Ga)Se2 devices: The importance of buffer properties},
author = {Repins, Ingrid and Glynn, Stephen and Silverman, Timothy J. and Garris, Rebekah and Bowers, Karen and Stevens, Bart and Mansfield, Lorelle},
abstractNote = {Some commercial Cu (In,Ga)Se2 (CIGS) modules reveal large changes in current-voltage parameters with light soaking. While such changes are not necessarily indicative of a performance problem, the associated uncertainty may be disadvantageous in a highly competitive market. Thus, it is beneficial to understand the origin of large metastabilities in order to define what processing changes might diminish metastability without impacting other desirable aspects of high-performance devices. This report attempts to reproduce large metastabilities like those in some commercial products both through absorber and buffer processing variations in small devices. While variations of both types were found to affect metastability, only buffer variations could reproduce large metastability in high-efficiency devices. Device modeling validates that buffer effects alone are sufficient to explain the large metastability seen in these devices.},
doi = {10.1002/pip.3145},
journal = {Progress in Photovoltaics},
number = 9,
volume = 27,
place = {United States},
year = {2019},
month = {6}
}

Journal Article:
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Works referenced in this record:

Optimization of CBD CdS process in high-efficiency Cu(In,Ga)Se2-based solar cells
journal, February 2002


Recombination kinetics and stability in polycrystalline Cu(In,Ga)Se2 solar cells
journal, February 2009