Title :
Optical determination of phase composition and processing effects on Cu2ZnSnSe4 film quality and device performance
Author :
Wang, Y. ; Bendapudi, S. ; Ferekides, C.S. ; Morel, D.L.
Author_Institution :
Dept. of Electr. Eng., Univ. of South Florida, Tampa, FL, USA
Abstract :
Cu2ZnSnSe4 has shown promise as a potential follow-on for CIGS because of the replacement of In with earth abundant Zn and Sn. At this early stage of development and because of its complexity little is known about its fundamental properties. The band gap in particular seems to vary even for the same film composition. In this paper we present an optical model that can be used to correlate optical properties with composition and structure. The model is enabling the determination of phase composition which is not easily done with normal techniques such as XRD. We also discuss our 2SSS processing approach and issues related to the eventual manufacturabilty of this technology.
Keywords :
X-ray diffraction; copper compounds; energy gap; semiconductor thin films; solar cells; ternary semiconductors; zinc compounds; 2SSS processing; Cu2ZnSnSe4; X-ray diffraction; XRD; band gap; device performance; film composition; film quality; optical determination; phase composition; processing effects; solar cells; Absorption; Optical films; Photonic band gap; Tin; Zinc; CIGS; Cu2ZnSnSe4; kesterite; optical model; photovoltaic cells;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2012 38th IEEE
Conference_Location :
Austin, TX
Print_ISBN :
978-1-4673-0064-3
DOI :
10.1109/PVSC.2012.6318149
