Characterizing SiC-AlN semiconductor solid solutions with indirect and direct bandgaps

článek v časopise ve Web of Science, Jimp

angličtina

The objective of the study is dependence of optical properties of solid solution of silicon carbide and aluminum nitride on structure. Even small differences in composition provide manipulation of band gap features in wide range. Data for this paper were collected by X-ray diffraction and by study of photoluminescence and absorption spectra. Evolution of optical properties as a result of composition changing was studied. X-ray study proves the presence of (SiC)1-x(AlN)x solid solution. Investigation of absorption spectra shows that optical band gap of the sample with composition of (SiC)0,88(AlN)0,12 is 3.1 eV and 4.24 eV for (SiC)0,36(AlN)0,64 solid solution. Photoluminescence demonstrates strongly dependence of spectrum on x concentration. The results are in mutual agrement and correspond to the therory. These data allows optimization of optical properties for certain optoelectronic application by control of the (SiC)1-x(AlN)x composition

x-ray diffraction, composition, photoluminescence, absorption coefficient, optical band gap, electron transition

DALLAEVA, D.; RAMAZANOV, S.; RAMAZANOV, G.; AKHMEDOV, R.; TOMÁNEK, P.

2015

6. 1. 2015

SPIE

Bellingham, USA

0277-786X

Proceedings of SPIE

9450

9450

Spojené státy americké

94501R-1

94501R-6

6