Na-induced effects on the electronic structure and composition of Cu(In,Ga)Se-2 thin-film surfaces

被引：83

作者：

Heske, C ^{[1
]}

Fink, R ^{[1
]}

Umbach, E ^{[1
]}

Riedl, W ^{[1
]}

Karg, F ^{[1
]}

机构：

[1] SIEMENS AG,CORP RES & DEV,D-80807 MUNICH,GERMANY

来源：

APPLIED PHYSICS LETTERS | 1996年 / 68卷 / 24期

关键词：

D O I：

10.1063/1.115783

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

X-ray and UV photoelectron spectroscopy measurements of Cu(InGa)Se-2 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 (less than or equal to 0.05 Angstrom) 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. (C) 1996 American Institute of Physics.

引用

页码：3431 / 3433

页数：3

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