New cadmium-free buffer layers as heterojunction partners on Cu(In,Ga)(S,Se)2 thin film solar cells

W. Eisele, A. Ennaoui, P. Schubert-Bischoff, M. Giersig, C. Pettenkofer, J. Krauser, M. Lux-Steiner, T. Riedle, N. Esser, S. Zweigart, F. Karg

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

A Zn(Se,OH) buffer layer deposited by chemical bath process on Cu(In,Ga)(S,Se)2 (CIGSS) absorbers is investigated. Before deposition of the actual ZnSe layer, the absorber is immersed in a Zn-containing solution (Zn treatment). Transmission electron microscopy (TEM) pictures of the buffer layer exhibit two different areas: A dark structured layer containing small crystals of ZnSe and a bright amorphous layer, which is thought to consist of Zn(OH)2 predominantly. We suggest that already during the Zn treatment an amorphous buffer layer is growing. X-ray photoelectron spectroscopy (XPS) measurements of the Cu2P and O1s peak of Zn-treated absorbers show a coverage with an OH component, attributed to Zn(OH)2. Nuclear reaction analysis (NRA) measurements reveal a peak hydrogen concentration of 8 × 1021 H/cm3 in the buffer layer. Micro-Raman spectra show a shift of the LO branch of ZnSe from 250 cm-1 to 258 cm-1.

Original languageEnglish
Title of host publicationConference Record of the IEEE Photovoltaic Specialists Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages692-695
Number of pages4
Volume2000-January
ISBN (Print)0780357728
DOIs
Publication statusPublished - 2000
Externally publishedYes
Event28th IEEE Photovoltaic Specialists Conference, PVSC 2000 - Anchorage, United States
Duration: 15 Sep 200022 Sep 2000

Other

Other28th IEEE Photovoltaic Specialists Conference, PVSC 2000
CountryUnited States
CityAnchorage
Period15/9/0022/9/00

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Keywords

  • Buffer layer
  • Cu(In,Ga)(SSe)2
  • Interface
  • Micro-Raman spectroscopy
  • NRA
  • TEM
  • XPS
  • Zn(Se.OH)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering

Cite this

Eisele, W., Ennaoui, A., Schubert-Bischoff, P., Giersig, M., Pettenkofer, C., Krauser, J., Lux-Steiner, M., Riedle, T., Esser, N., Zweigart, S., & Karg, F. (2000). New cadmium-free buffer layers as heterojunction partners on Cu(In,Ga)(S,Se)2 thin film solar cells. In Conference Record of the IEEE Photovoltaic Specialists Conference (Vol. 2000-January, pp. 692-695). [915960] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2000.915960