Mechanisms of extrinsic alkali incorporation in GIGS solar cells on flexible polyimide elucidated by nanoscale and quantitative analyses
- 주제(키워드) Solar cells , CIGS , Flexible , Polyimide , Atom probe tomography
- 주제(기타) Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied
- 설명문(일반) [Kim, Kihwan; Jeong, Inyoung; Cho, Yunae; Shin, Donghyeop; Song, Soomin; Ahn, Seung Kyu; Eo, Young-Joo; Cho, Ara; Gwak, Jihye] Korea Inst Energy Res, Photovolta Lab, Daejeon 34129, South Korea; [Jung, Chanwon; Choi, Pyuck-Pa] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Daejeon 34141, South Korea; [Jo, William] Ewha Womans Univ, Dept Phys, Seoul 03760, South Korea; [Kim, Jin Hyeok] Chonnam Natl Univ, Dept Mat Sci & Engn, Gwangju 61186, South Korea; [Gwak, Jihye; Yun, Jae Ho] Korea Inst Energy Res, New & Renewable Energy Inst, Daejeon 34129, South Korea; [Gwak, Jihye; Yun, Jae Ho] UST, Daejeon 34113, South Korea
- 등재 SCIE, SCOPUS
- 발행기관 ELSEVIER
- 발행년도 2020
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000166007
- 본문언어 영어
- Published As http://dx.doi.org/10.1016/j.nanoen.2019.104201
초록/요약
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.
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