CuInSe2 and CuGaSe2 Thin Film Solar Cells for Tandem Structures

Stolt, Lars; Hedström, Jonas; Jargelius, M.; Niemi, Esko; Sigurd, D.

doi:10.1007/978-94-009-3817-5_81

Cited by 2 publications

(1 citation statement)

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“…In Ref. 13, thin (50 nm) co-evaporated films were shown to have such compositions by RBS. On thicker films of 1500 nm, a lower selenium content was obtained by EDS analysis.…”

Section: Compositional Analysismentioning

confidence: 97%

Characterization of CuInSe₂ thin films by XPS

Niemi

Stolt

1990

Surface & Interface Analysis

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The surface composition of CuIaSe, thin films, made by co-evaporation of the elements, has been shown to be strongly dependent on the bulk composition of the films. This is explained by the presence of a secondary phase, most likely Cu,Se, on the surface of Cu-rich Alms. The fast variation of the surface Concentration is also found for films that, according to the equilibrium pseudobinary phase diagram (Cu,Se-In,Se,), should be singlephase chalcopyrite. An explanation, suggesting the presence of a Cu-rich compound also on the surface of films with a composition in the single phase region, is proposed.Surface atomic concentrations have been shown to be modified in CuIaSe, films by a 4.5 keV Ar' sputter etch Heating in vacuum at the film deposition temperature restores the surface atomic concentrations to an asdeposited condition, with the exception of the selenium concentration. The missing selenium atoms are substituted by oxygen atoms still remaining in the film after sputtering and heating.

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“…In Ref. 13, thin (50 nm) co-evaporated films were shown to have such compositions by RBS. On thicker films of 1500 nm, a lower selenium content was obtained by EDS analysis.…”

Section: Compositional Analysismentioning

confidence: 97%