Accession Number:

AD1051172

Title:

Ga- and N-polar GaN Growths on SiC Substrate

Descriptive Note:

Technical Report,30 Sep 2014,29 Sep 2017

Corporate Author:

National Taiwan University Taipei Taiwan

Personal Author(s):

Report Date:

2018-03-15

Pagination or Media Count:

53.0

Abstract:

The growth of a two-section, core-shell, InGaNGaN quantum-well QW nanorod- NR- array light-emitting diode device based on a pulsed growth technique with metalorganic chemical vapor deposition MOCVD is demonstrated. A two-section n-GaN NR is grown through a tapering process for forming two uniform NR sections of different cross-sectional sizes. The cathodoluminescence CL, photoluminescence PL, and electroluminescence EL characterization results of the two-section NR structure are compared with those of a single-section NR sample, which is prepared under the similar condition to that for the first uniform NR section of the two-section sample. All the CL, PL, and EL spectra of the two-section sample peaked between 520 and 525 nm are red-shifted from those of the single-section sample peaked around 490 nm by 30 nm in wavelength. Also, the emitted spectral widths of the two-section sample become significantly larger than their counterparts of the single-section sample. The PL spectral full-width at half-maximum increases from 37 to 61 nm. Such variations are attributed to the higher indium incorporation in the sidewall QWs of the two-section sample due to the stronger strain relaxation in an NR section of a smaller cross-sectional size and the more constituent atom supply from the larger gap volume between neighboring NRs.

Subject Categories:

  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE