Klein, Andreas ; Löher, Thomas ; Pettenkofer, C. ; Jaegermann, Wolfram (2021)
Chemical interaction of Na with cleaved (011) surfaces of CuInSe₂.
In: Journal of Applied Physics, 80 (9)
doi: 10.26083/tuprints-00019909
Artikel, Zweitveröffentlichung, Verlagsversion
Kurzbeschreibung (Abstract)
To study the beneficial effect of sodium‐containing substrate material on the photovoltaic properties of thin‐film CuInSe₂ solar cells the chemical interaction of Na with CuInSe₂ has been investigated by synchrotron excited photoelectron spectroscopy. A clean CuInSe₂ (011) surface was prepared by cleaving an oriented single crystal in UHV. The cleaved surface exhibits an electron affinity of χ≊4.6 eV. The Se 3d level shows a surface core level shift of −0.4 eV. Na was sequentially deposited in UHV in small steps from a commercial dispenser source. Initially ionized Na adsorbs on the surface leading to a shift of the surface Fermi level by 0.3 eV closer to the conduction band. Removal of Cu from the surface is observed. For higher Na deposition a chemical reaction of Na with the CuInSe₂ surface occurs leading to the formation of metallic indium and Na₂Se.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Klein, Andreas ; Löher, Thomas ; Pettenkofer, C. ; Jaegermann, Wolfram |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Chemical interaction of Na with cleaved (011) surfaces of CuInSe₂ |
| Sprache: | Englisch |
| Publikationsjahr: | 2021 |
| Verlag: | AIP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 80 |
| (Heft-)Nummer: | 9 |
| DOI: | 10.26083/tuprints-00019909 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/19909 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichungsservice |
| Kurzbeschreibung (Abstract): | To study the beneficial effect of sodium‐containing substrate material on the photovoltaic properties of thin‐film CuInSe₂ solar cells the chemical interaction of Na with CuInSe₂ has been investigated by synchrotron excited photoelectron spectroscopy. A clean CuInSe₂ (011) surface was prepared by cleaving an oriented single crystal in UHV. The cleaved surface exhibits an electron affinity of χ≊4.6 eV. The Se 3d level shows a surface core level shift of −0.4 eV. Na was sequentially deposited in UHV in small steps from a commercial dispenser source. Initially ionized Na adsorbs on the surface leading to a shift of the surface Fermi level by 0.3 eV closer to the conduction band. Removal of Cu from the surface is observed. For higher Na deposition a chemical reaction of Na with the CuInSe₂ surface occurs leading to the formation of metallic indium and Na₂Se. |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-199095 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Oberflächenforschung |
| Hinterlegungsdatum: | 15 Nov 2021 13:15 |
| Letzte Änderung: | 16 Nov 2021 07:17 |
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