A chemical bath process for depositing Cu2ZnSnS4 photovoltaic absorbers

Author

Wangperawong, A. ; King, J.S. ; Herron, S.M. ; Tran, B.P. ; Pangan-Okimoto, K. ; Bent, S.F.

Author_Institution

Dept. of Electr. Eng., Stanford Univ., Stanford, CA, USA

fYear

2010

fDate

20-25 June 2010

Abstract

Thin films of Cu₂ZnSnS₄ (CZTS) were fabricated through a combination of chemical bath deposition, ion exchange and sulfurization heat treatment. Scanning electron microscopy was used to study the morphology of the thin films, Auger electron spectroscopy for compositional analysis, X-ray diffraction and Raman scattering for structural characterization, and diffuse reflectance UV-Vis measurements for optical properties. With the method described, compositionally uniform microcrystalline CZTS with kesterite structure and a bandgap of 1.45 eV have been produced, and a preliminary solar cell device was fabricated to demonstrate that this material is applicable in earth-abundant, non-toxic thin film photovoltaics.

Keywords

Auger electron spectroscopy; Raman spectra; X-ray diffraction; copper compounds; heat treatment; ion exchange; optical properties; scanning electron microscopy; solar cells; Auger electron spectroscopy; Cu₂ZnSnS₄; Raman scattering; X-ray diffraction; chemical bath deposition; chemical bath process; compositional analysis; diffuse reflectance UV-Vis measurements; electron volt energy 1.45 eV; ion exchange; kesterite structure; optical properties; photovoltaic absorbers; scanning electron microscopy; solar cell device; structural characterization; sulfurization heat treatment; thin films;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Specialists Conference (PVSC), 2010 35th IEEE

Conference_Location

Honolulu, HI

ISSN

0160-8371

Print_ISBN

978-1-4244-5890-5

Type

conf

DOI

10.1109/PVSC.2010.5616414

Filename

5616414