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Title: | Surface Passivation of CIGS Solar Cells Using Gallium Oxide | Authors: | Garud, Siddhartha Gampa, Nikhil Allen, Thomas G. Kotipalli, Ratan Flandre, Denis Batuk, Maria Hadermann, Joke MEURIS, Marc POORTMANS, Jef Smets, Arno VERMANG, Bart |
Issue Date: | 2018 | Source: | PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 215(7) (Art N° 1700826) | Abstract: | This work proposes gallium oxide grown by plasma-enhanced atomic layer deposition, as a surface passivation material at the CdS buffer interface of Cu(In,Ga)Se-2 (CIGS) solar cells. In preliminary experiments, a metal-insulator-semiconductor (MIS) structure is used to compare aluminium oxide, gallium oxide, and hafnium oxide as passivation layers at the CIGS-CdS interface. The findings suggest that gallium oxide on CIGS may show a density of positive charges and qualitatively, the least interface trap density. Subsequent solar cell results with an estimated 0.5nm passivation layer show an substantial absolute improvement of 56mV in open-circuit voltage (V-OC), 1mAcm(-2) in short-circuit current density (J(SC)), and 2.6% in overall efficiency as compared to a reference (with the reference showing 8.5% under AM 1.5G). | Notes: | Vermang, B (reprint author), IMOMEC Partner Solliance, Imec Div, B-3590 Hasselt, Belgium, Hasselt Univ, Fac Engn Technol, B-3590 Hasselt, Belgium. bart.vermang@uhasselt.be | Keywords: | CIGS solar cells; gallium oxide; plasma-enhanced atomic layer deposition; surface passivation | Document URI: | http://hdl.handle.net/1942/26444 | ISSN: | 1862-6300 | e-ISSN: | 1862-6319 | DOI: | 10.1002/pssa.201700826 | ISI #: | 000430128500015 | Rights: | © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2019 |
Appears in Collections: | Research publications |
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File | Description | Size | Format | |
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garud 1.pdf Restricted Access | Published version | 1.27 MB | Adobe PDF | View/Open Request a copy |
Gallium_oxide_CIGS_Garud_submitted.pdf Restricted Access | Peer-reviewed author version | 1.22 MB | Adobe PDF | View/Open Request a copy |
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