Browsing by Author "Bi, Chien-Chung"

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Cost-Effective and Self-Textured Gallium-Doped Zinc Oxide Front Contacts for Hydrogenated Amorphous Silicon Thin-Film Solar Cells
(2013-02-01)
Yu, Shu-Hung
;
Ho, Po-Ching
;
Lee, Chia-Ling
;
Bi, Chien-Chung
;
Yeh, Chih-Hung
We adopt a economical and original method to fabricate self-textured gallium-doped zinc oxide (GZO) front contacts for hydrogenated amorphous silicon (a-Si: H) single-junction solar cells. This technique involves an atmospheric-pressure plasma jet (APPJ) and a dc sputtering process. The electro-optical characteristics of the textured GZO films are mainly controlled by the haze of organosilicon underlayers deposited by the APPJ. The films exhibit an average optical transmittance of about 80% and resistivity below 9.91 x 10(-4) Omega cm. Moreover, compared with flat solar cells, textured cells fabricated on moderate GZO front contacts show 7.9 and 10.9% enhancements in conversion efficiency and short-circuit current density, respectively. (C) 2013 The Japan Society of Applied Physics
Double-Pattern Textured ZnO:Ga Thin Films Fabricated by an APPJ and an DC Sputtering
(2012)
Yu, Shu-Hung
;
Ho, Po-Ching
;
Yang, Teng-Wei
;
Bi, Chien-Chung
;
Yeh, Chih-Hung
Here, double-pattern textured gallium doped zinc oxide (GZO) films were achieved by inserting organosilicon underlayers deposited from an atmospheric pressure plasma jet (APPJ) between sputtered GZO films and glass substrates. The electro-optical characteristics of the textured GZO films were controlled by the haze of organosilicon underlayers. All GZO films were thermally annealed in high vacuum to improve film quality. Post-annealed textured GZO films exhibited an average optical transmittance of about 80% in a wide range. Hall measurements showed Hall mobility above 26 cm(2)/V-s, carrier concentration around 2.4 x 10(20) cm(-3) and resistivity below 9.91 x 10(-4) Omega-cm. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.003203ssl] All rights reserved.