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Mechanisms of extrinsic alkali incorporation in GIGS solar cells on flexible polyimide elucidated by nanoscale and quantitative analyses

Title
Mechanisms of extrinsic alkali incorporation in GIGS solar cells on flexible polyimide elucidated by nanoscale and quantitative analyses
Authors
Kim, KihwanJeong, InyoungCho, YunaeShin, DonghyeopSong, SoominAhn, Seung KyuEo, Young-JooCho, AraJung, ChanwonJo, WilliamKim, Jin HyeokChoi, Pyuck-PaGwak, JihyeYun, Jae Ho
Ewha Authors
조윌렴
SCOPUS Author ID
조윌렴scopus
Issue Date
2020
Journal Title
NANO ENERGY
ISSN
2211-2855JCR Link

2211-3282JCR Link
Citation
NANO ENERGY vol. 67
Keywords
Solar cellsCIGSFlexiblePolyimideAtom probe tomography
Publisher
ELSEVIER
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
In this work, Cu(In,Ga)Se-2 (CIGS) solar cells on polyimide (PI) substrates were fabricated using a low-temperature three-stage co-evaporation process. To enhance device performance, the CIGS films were extrinsically doped with alkali (Na and K) using an in-situ post deposition treatment (PDT). To account for mechanisms of extrinsic alkali incorporation in CIGS solar cells on flexible polyimide, the alkali dopant concentrations in the film bulk (intragrain and grain boundary) and the surface chemistries/band structures were quantitatively investigated with various advanced characterization methods. In addition, the effects of the PDT sequences on the resulting device performance were studied with a particular emphasis on the characteristics of CIGS surfaces. By controlling the alkali incorporation into the CIGS absorber films, flexible lightweight CIGS thin-film solar cells with an efficiency of approximately 19% were obtained.
DOI
10.1016/j.nanoen.2019.104201
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자연과학대학 > 물리학전공 > Journal papers
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