Parameterization of CuIn(1-x)Ga(x)Se(2) (x=0, 0.5, and 1) energy bands
2011 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 519, no 21, 7503-7507 p.Article in journal (Refereed) Published
Parameterization of the electronic band structure of CuIn(1-x)Ga(x)Se(2) (x=0, 0.5, and 1) demonstrates that the energy dispersions of the three uppermost valence bands [E(j)(k); j=v1, v2, and v3] are strongly anisotropic and non-parabolic even very close to the Gamma-point valence-band maximum E,(0). Also the lowest conduction band E(c1) (k) is anisotropic and non-parabolic for energies similar to 0.05 eV above the band-gap energy. Since the electrical conductivity depends directly on the energy dispersion, future electron and hole transport simulations of CuIn(1-x)Ga(x)Se(2) need to go beyond the parabolic approximation of the bands. We therefore present a parameterization of the energy bands, the k-dependency of the effective electron and hole masses m(f)(k), and also an average energy-dependent approximation of the masses m(j)(E).
Place, publisher, year, edition, pages
2011. Vol. 519, no 21, 7503-7507 p.
CuInSe(2), CuGaSe(2), Chalcopyrite, Solar cells, Band structure, Electronic structure, Effective mass
IdentifiersURN: urn:nbn:se:kth:diva-45289DOI: 10.1016/j.tsf.2010.12.216ISI: 000295347700088ScopusID: 2-s2.0-80052151715OAI: oai:DiVA.org:kth-45289DiVA: diva2:452239
FunderSwedish Research Council
QC 201110282011-10-282011-10-282015-03-05Bibliographically approved