Optimizing sulfurisation conditions in the fabrication of Cu 2ZnSnS4 absorber layers from electroplated precursors

Jonathan J Scragg, Daniel Wolverson, Z Guillaume, Laurence M Peter

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Using direct photoelectrochemical measurement of the photocurrent obtained from Cu2ZnSnS4 (CZTS) absorber layers made by a two-stage electroplating-sulfurisation process, the influence of processing conditions (temperature, time, and pressure) on material quality was investigated with a view to understanding the long sulfurisation times usually found in the literature. The improvement in photocurrent due to KCN etching was also studied, and seems to be due both to removal of surface phases and also slower etching of the bulk material. The optimum sulfurisation time was found to be around 50 minutes, despite evidence that sulfur incorporation and phase formation are complete within 5 minutes. Slow grain growth was suggested as a rate-limiting factor, and a rate constant was derived based on a simple model.
Original languageEnglish
Title of host publicationPhotovoltaic Materials and Manufacturing Issues II
Place of PublicationWarrendale, PA.
PublisherMaterials Research Society
Volume1210
DOIs
Publication statusPublished - 2010
Event2009 MRS Fall Meeting - Boston, USA United States
Duration: 29 Nov 20093 Dec 2009

Conference

Conference2009 MRS Fall Meeting
CountryUSA United States
CityBoston
Period29/11/093/12/09

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