Selenization of CuInS2 by rapid thermal processing - an alternative approach to induce a band gap grading in chalcopyrite thin-film solar cell absorbers?

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Details zur Publikation

Autorinnen und Autoren: Felix R, Weber A, Zander O, Rodriguez-Alvarez H, Schubert BA, Klaer J, Wilks RG, Schock HW, Mainz R, Bär M
Zeitschrift: Journal of Materials Chemistry A
Jahr der Veröffentlichung: 2019
Band: 7
Heftnummer: 5
ISSN: 2050-7488


Abstract

A treatment of CuInS2 (CIS) based on rapid thermal processing (RTP) selenization is developed, aiming at tuning the absorber's band gap grading using the [Se]/([S] + [Se]) composition. X-ray photoelectron spectroscopy and X-ray fluorescence analysis measurements of RTP-treated CIS samples (with the used set of RTP-parameter ranges) show a greater treatment effect at the surface of the sample compared to the bulk. A tuning of the [Cu] : [In] : ([S] + [Se]) surface composition from a Cu-poor 1 : 3 : 5 to a 1 : 1 : 2 stoichiometry is also observed in RTP-treated CIS absorbers with lower to higher surface Se contents, respectively. Ultraviolet photoelectron spectroscopy measurements show a shift in valence band maximum toward the Fermi level, E-F, in higher surface Se content samples [from (-0.88 +/- 0.1) to (-0.51 +/- 0.1) eV], as expected for a reduction of the (surface) band gap produced by exchanging S with Se. Ultraviolet-visible spectrophotometry reveals a reduction in the optical (bulk) band gap of samples with greater Se incorporation [from(1.47 +/- 0.05) to (1.08 +/- 0.05) eV], allowing for a working window for optimization purposes.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Bär, Marcus Prof. Dr.-Ing.
Professur für Röntgenspektroskopie (HIERN)


Einrichtungen weiterer Autorinnen und Autoren

Helmholtz-Zentrum Berlin für Materialien und Energie (HZB)


Zitierweisen

APA:
Felix, R., Weber, A., Zander, O., Rodriguez-Alvarez, H., Schubert, B.-A., Klaer, J.,... Bär, M. (2019). Selenization of CuInS2 by rapid thermal processing - an alternative approach to induce a band gap grading in chalcopyrite thin-film solar cell absorbers? Journal of Materials Chemistry A, 7(5). https://dx.doi.org/10.1039/c8ta10823d

MLA:
Felix, Roberto, et al. "Selenization of CuInS2 by rapid thermal processing - an alternative approach to induce a band gap grading in chalcopyrite thin-film solar cell absorbers?" Journal of Materials Chemistry A 7.5 (2019).

BibTeX: 

Zuletzt aktualisiert 2019-15-03 um 09:49