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Channel: ScienceDirect Publication: Journal of Crystal Growth
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Surface and bulk electronic properties of low temperature synthesized InN microcrystals

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Publication date: 15 April 2015
Source:Journal of Crystal Growth, Volume 416
Author(s): B.K. Barick , S. Dhar
Structural and electronic properties of InN microcrystals, which are synthesized by nitridation of LiInO2 with NaNH2 in a Teflon-lined autoclave at temperatures ranging between 170 and 240°C, are studied as a function of the growth temperature using x-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), photo-absorption, Raman spectroscopy and x-ray photo-emission spectroscopy (XPS) techniques. Our study shows the formation of wurtzite InN crystals with an average size of 100nm even at 170°C. The study, furthermore, suggests an enhancement of electron concentration and a reduction of electron mobility in the crystal as the synthesis temperature (T S ) decreases. The density of certain defects lying very close to the band edge is also found to increase with the reduction of T S . These defects are expected to act as donors, which can explain the enhancement of carrier concentration as the growth temperature decreases.


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