Large metastability in Cu (In,Ga)Se2 devices: The importance of buffer properties

Repins, Ingrid; Glynn, Stephen; Silverman, Timothy J.; Garris, Rebekah; Bowers, Karen; Stevens, Bart; Mansfield, Lorelle

doi:10.1002/pip.3145

Title: Large metastability in Cu (In,Ga)Se₂ devices: The importance of buffer properties

Journal Article · Wed Jun 26 00:00:00 EDT 2019 · Progress in Photovoltaics

DOI:https://doi.org/10.1002/pip.3145· OSTI ID:1543253

^[1]; Glynn, Stephen ^[1]; Silverman, Timothy J. ^[1]; Garris, Rebekah ^[1]; Bowers, Karen ^[1]; Stevens, Bart ^[1];

^[1]

National Renewable Energy Lab. (NREL), Golden, CO (United States)

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.

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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; AC36‐08GO28308

OSTI ID:: 1543253

Alternate ID(s):: OSTI ID: 1529678

Report Number(s):: NREL/JA-5K00-72573; MainId:19747; UUID:9e2edfaa-f4c8-e811-9c19-ac162d87dfe5; MainAdminID:8224

Journal Information:: Progress in Photovoltaics, Vol. 27, Issue 9; ISSN 1062-7995

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 12 works

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