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Materials 2018, 11(6), 953; https://doi.org/10.3390/ma11060953

Formation of Cl-Doped ZnO Thin Films by a Cathodic Electrodeposition for Use as a Window Layer in CIGS Solar Cells

1
Institute of Photoelectronic Thin Film Devices and Technology and Tianjin Key Laboratory of Thin film Devices and Technology, Nankai University, Tianjin 300071, China
2
Department of Electronic Engineering, Chang Gung University, Kweishan, Taoyuan 333, Taiwan
3
Department of Otolaryngology-Head and Neck Surgery, Chang Gung Memorial Hospital, Kweishan, Taoyuan 333, Taiwan
*
Author to whom correspondence should be addressed.
Received: 15 May 2018 / Revised: 28 May 2018 / Accepted: 28 May 2018 / Published: 5 June 2018
(This article belongs to the Special Issue Selected Papers from IEEE ICASI 2018)
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Abstract

Zinc oxide films that are prepared by radio frequency (RF) sputtering are widely used as window layers in copper indium gallium diselenide (CIGS) solar cells. To reduce their production cost, the electrodeposition method for preparing Cl-doped zinc oxide (ZnO:Cl), rather than sputtering, was studied. The electrodeposition parameters of injected current density and the pH of the electrolyte solution were studied. A moderate current density was used to yield high quality zinc oxides. The pH of the electrolyte greatly affected the formation of ZnO films. The pH value of the electrolyte that ensured that zinc oxides of high quality are obtained was close to seven. Electrodeposited ZnO:Cl films had higher transmittance than ZnO:Al films in the near-infrared region and so they can be used to improve the performance of solar cells. Our experiments revealed that the CIGS solar cells with electrodeposited ZnO:Cl films as a window layer were slightly more efficient than those with sputtered ZnO:Al films. View Full-Text
Keywords: Zinc oxide; RF sputtering; electrodeposition; Cl-doped zinc oxide (ZnO:Cl); cadmium sulfide; CIGS solar cells; transmittance Zinc oxide; RF sputtering; electrodeposition; Cl-doped zinc oxide (ZnO:Cl); cadmium sulfide; CIGS solar cells; transmittance
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Ao, J.; Fu, R.; Jeng, M.-J.; Bi, J.; Yao, L.; Gao, S.; Sun, G.; He, Q.; Zhou, Z.; Sun, Y.; Chang, L.-B. Formation of Cl-Doped ZnO Thin Films by a Cathodic Electrodeposition for Use as a Window Layer in CIGS Solar Cells. Materials 2018, 11, 953.

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