In:
physica status solidi c, Wiley, Vol. 11, No. 7-8 ( 2014-07), p. 1345-1348
Kurzfassung:
The band gap energy ( E g ) of high‐quality Mg x Zn 1‐ x O films grown on ZnO (0001) substrates by the plasma‐assisted reactive evaporation method using a ZnMg alloy could be estimated by the photocurrent ( I ph ). Measurement of I ph was more useful than photoluminescence (PL), transmittance or reflectance (R) spectra measurements for determination of E g of materials with large binding energy of the excitons. The values estimated from the relation of ( α k hν ) 2 – hv plots using optical absorption coefficient α k calculated from extinction coefficient k were close to the peak energy of PL or R of these films. The values estimated from the relation of ( α ph hv ) 2 – hν plots using inter‐band absorption coefficient α ph calculated from I ph spectra were larger than the values of peak energy of PL or R despite strong absorption of the excitons. Therefore, it was thought that these values are closer to E g . (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Materialart:
Online-Ressource
ISSN:
1862-6351
,
1610-1642
DOI:
10.1002/pssc.v11.7/8
DOI:
10.1002/pssc.201300598
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2014
ZDB Id:
2105580-4
ZDB Id:
2102966-0