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Na-induced effects on the electronic structure and composition of Cu(In,Ga)Se2 thin-film surfaces (1996)

Heske, C. ; Fink, R. ; Umbach, E. ; [et al.]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 68 (1996), S. 3431-3433

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ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: X-ray and UV photoelectron spectroscopy measurements of Cu(InGa)Se2 thin films grown on Mo coated soda-lime glass show segregation from the substrate and formation of two different Na species. One of these species is also identified after deliberate deposition of metallic Na. Moreover, the adsorption (or segregation) of this species reduces the native oxide SeO2, while the other, reacted Na species coexists with SeO2. Small amounts of Na (≤0.05 A(ring)) induce a band bending and reduce the surface dipole. These findings reveal a positive influence of segregated Na on the morphology and electrical characteristics of Na-enriched films, improving the overall performance of the solar cells. © 1996 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.115783

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