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

fYear

2012

fDate

3-8 June 2012

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Specialists Conference (PVSC), 2012 38th IEEE

Conference_Location

Austin, TX

ISSN

0160-8371

Print_ISBN

978-1-4673-0064-3

Type

conf

DOI

10.1109/PVSC.2012.6318149

Filename

6318149