Investigation into ultrathin CdTe solar cell Voc using SCAPS modelling

Clayton, Andrew J, Di Carlo, V, Irvine, Stuart J, Barrioz, Vincent and Lamb, D.A. (2014) Investigation into ultrathin CdTe solar cell Voc using SCAPS modelling. Materials Research Innovations, 18 (7). pp. 505-508. ISSN 1432-8917

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Abstract

Ultrathin CdTe photovoltaic solar cells were produced by metal organic chemical vapour deposition in a single horizontally configured growth chamber. Solar cell activation was investigated by varying the duration of the CdCl2 layer deposition and 420°C thermal anneal to promote Cl diffusion into the CdTe. Thicker CdCl2 layers used in activation treatment resulted in a greater degree of sulphur interdiffusion, up to 2 at.-%, into the CdTe layer. The thicker CdCl2 activation layer was necessary to lower the reverse saturation current density for obtaining optimum experimental photovoltaic (PV) device performances. Modelling of the PV performances with equivalent solar cell structure for optimised devices using solar cell capacitance simulation software resulted in an overestimated open circuit voltage (Voc). The simulations showed that reduced acceptor states at the CdTe interface with the intermixed region resulted in the largest decrease in Voc when considering large back surface recombination velocities.

Item Type:	Article
Additional Information:	The full text of this article is not available in this Repository until November 2015. The definitive version of this article is available at http://www.maneyonline.com/doi/abs/10.1179/1433075X14Y.0000000259
Keywords:	MOCVD, Ultrathin CdTe, Photovoltaics, Modelling
Divisions:	Applied Science, Computing and Engineering
Depositing User:	Mr Stewart Milne
Date Deposited:	05 May 2015 09:37
Last Modified:	19 Dec 2017 15:09
URI:	https://wrexham.repository.guildhe.ac.uk/id/eprint/8295

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