Quantum confinement effects of thin ZnO films by experiment and theory

Thin ZnO films with thickness ranging between 2 and 300 nm have been grown on quartz, Corning glass and Si (100) substrates by radio frequency magnetron sputtering. The film thickness was determined by pre-calibrated quartz balance with the help of x-ray reflectivity measurements. X-ray diffraction experiments revealed the formation of highly-textured hexagonal ZnO. Ultraviolet-visible light absorption spectroscopy has shown a "blue shift" of the direct band gap of ZnO. The experimental results are interpreted as evidences of quantum confinement effects. This is supported by theoretical predictions of the optical gap, which was calculated in the framework of effective mass approximation by solving the two particle (electron and hole) Hartree-Fock equations. The observed fair agreement between theoretical and experimental results corroborates the quantum confinement interpretation.

Kanistras, N.Univ Patras, Mat Sci Dept, Patras 26504, Greece. (författare)
Ntagkas, A.Univ Patras, Mat Sci Dept, Patras 26504, Greece. (författare)
Anyfantis, D. I.Univ Patras, Mat Sci Dept, Patras 26504, Greece. (författare)
Stamatelatos, A.Univ Patras, Mat Sci Dept, Patras 26504, Greece. (författare)
Kapaklis, Vassilios,1978-Uppsala universitet,Materialfysik(Swepub:uu)vaska415 (författare)
Bouropoulos, N.Univ Patras, Mat Sci Dept, Patras 26504, Greece.;Fdn Res & Technol Hellas, Inst Chem Engn & High Temp Chem Proc, Patras 26504, Greece. (författare)
Mystiridou, E.Univ Patras, Mat Sci Dept, Patras 26504, Greece. (författare)
Poulopoulos, P.Univ Patras, Mat Sci Dept, Patras 26504, Greece. (författare)
Garoufalis, C. S.Univ Patras, Mat Sci Dept, Patras 26504, Greece. (författare)
Baskoutas, S.Univ Patras, Mat Sci Dept, Patras 26504, Greece. (författare)
Univ Patras, Mat Sci Dept, Patras 26504, Greece.Materialfysik (creator_code:org_t)

Ingår i:Physica. E, Low-Dimensional systems and nanostructures: ELSEVIER1201386-94771873-1759

Av författaren/redakt...: Barnasas, A.; Kanistras, N.; Ntagkas, A.; Anyfantis, D. I.; Stamatelatos, A.; Kapaklis, Vassil ...; visa fler...; Bouropoulos, N.; Mystiridou, E.; Poulopoulos, P.; Garoufalis, C. S ...; Baskoutas, S.; visa färre...

Om ämnet

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.