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

Kihwan Kim; Inyoung Jeong; Yunae Cho; Donghyeop Shin; Soomin Song; Seung Kyu Ahn; Young Joo Eo; Ara Cho; Chanwon Jung; William Jo; Jin Hyeok Kim; Pyuck Pa Choi; Jihye Gwak; Jae Ho Yun

doi:10.1016/j.nanoen.2019.104201

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

Kihwan Kim, Inyoung Jeong, Yunae Cho, Donghyeop Shin, Soomin Song, Seung Kyu Ahn, Young Joo Eo, Ara Cho, Chanwon Jung, William Jo, Jin Hyeok Kim, Pyuck Pa Choi, Jihye Gwak, Jae Ho Yun

Department of Physics

Research output: Contribution to journal › Article › peer-review

46 Scopus citations

Abstract

In this work, Cu(In,Ga)Se₂ (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.

Original language	English
Article number	104201
Journal	Nano Energy
Volume	67
DOIs	https://doi.org/10.1016/j.nanoen.2019.104201
State	Published - Jan 2020

Bibliographical note

Publisher Copyright:
© 2019 Elsevier Ltd

Keywords

Atom probe tomography
CIGS
Flexible
Polyimide
Solar cells

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.nanoen.2019.104201

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Kim, K., Jeong, I., Cho, Y., Shin, D., Song, S., Ahn, S. K., Eo, Y. J., Cho, A., Jung, C., Jo, W., Kim, J. H., Choi, P. P., Gwak, J., & Yun, J. H. (2020). Mechanisms of extrinsic alkali incorporation in CIGS solar cells on flexible polyimide elucidated by nanoscale and quantitative analyses. Nano Energy, 67, Article 104201. https://doi.org/10.1016/j.nanoen.2019.104201

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title = "Mechanisms of extrinsic alkali incorporation in CIGS solar cells on flexible polyimide elucidated by nanoscale and quantitative analyses",

abstract = "In this work, Cu(In,Ga)Se2 (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.",

keywords = "Atom probe tomography, CIGS, Flexible, Polyimide, Solar cells",

author = "Kihwan Kim and Inyoung Jeong and Yunae Cho and Donghyeop Shin and Soomin Song and Ahn, {Seung Kyu} and Eo, {Young Joo} and Ara Cho and Chanwon Jung and William Jo and Kim, {Jin Hyeok} and Choi, {Pyuck Pa} and Jihye Gwak and Yun, {Jae Ho}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2020",

month = jan,

doi = "10.1016/j.nanoen.2019.104201",

language = "English",

volume = "67",

journal = "Nano Energy",

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AU - Kim, Kihwan

AU - Jeong, Inyoung

AU - Cho, Yunae

AU - Shin, Donghyeop

AU - Song, Soomin

AU - Ahn, Seung Kyu

AU - Eo, Young Joo

AU - Cho, Ara

AU - Jung, Chanwon

AU - Jo, William

AU - Kim, Jin Hyeok

AU - Choi, Pyuck Pa

AU - Gwak, Jihye

AU - Yun, Jae Ho

PY - 2020/1

Y1 - 2020/1

N2 - In this work, Cu(In,Ga)Se2 (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.

AB - In this work, Cu(In,Ga)Se2 (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.

KW - Atom probe tomography

KW - CIGS

KW - Flexible

KW - Polyimide

KW - Solar cells

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DO - 10.1016/j.nanoen.2019.104201

M3 - Article

AN - SCOPUS:85074421521

SN - 2211-2855

VL - 67

JO - Nano Energy

JF - Nano Energy

M1 - 104201

ER -

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

Abstract

Bibliographical note

Keywords

UN SDGs

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