Effect of buffer layer on minority carrier lifetime and series resistance of bifacial heterojunction silicon solar cells analyzed by impedance spectroscopy

Garcia-Belmonte, G., Garcia Canadas, Jorge, Mora-Sero, I., Bisquert, J., Voz, C., Puigdollers, J. and Alcubilla, R. 2006. Effect of buffer layer on minority carrier lifetime and series resistance of bifacial heterojunction silicon solar cells analyzed by impedance spectroscopy. Thin Solid Films 514 (1-2) , pp. 254-257. 10.1016/j.tsf.2006.02.020

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Abstract

By combining information on solar cell layer structure and electrical response analyzed by impedance spectroscopy, relevant knowledge is obtained about photogenerated carriers recombination and extraction. The inclusion of a-Si:H buffer layers on the response of bifacial heterojunction silicon solar cells prepared by hot-wire chemical vapor deposition is studied. Impedance analysis indicates that the effect of the buffer layer is twofold: (a) effective minority carrier lifetime is improved by one order of magnitude, confirmed by alternative quasi-steady-state photoconductance, and (b) whole series resistance is increased. Both effects seem to compensate each other so as to get similar efficiency and fill factor.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords:	Solar cell; Impedance spectroscopy; Buffer layer; Chemical vapor deposition; Carrier lifetime
Publisher:	Elsevier
ISSN:	0040-6090
Last Modified:	19 Mar 2016 23:21
URI:	https://orca.cardiff.ac.uk/id/eprint/48415

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