State-of-the-art and prospects for intense red radiation from core-shell InGaN/GaN nanorods.

ABSTRACT: Core-shell nanorods (NRs) with InGaN/GaN quantum wells (QWs) are promising for monolithic white light-emitting diodes and multi-color displays. Such applications, however, are still a challenge because intensity of the red band is too weak compared with blue and green. To clarify this problem, we measured photoluminescence of different NRs, depending on power and temperature, as well as with time resolution. These studies have shown that dominant emission bands come from nonpolar and semipolar QWs, while a broad yellow-red band arises mainly from defects in the GaN core. An emission from polar QWs located at the NR tip is indistinguishable against the background of defect-related luminescence. Our calculations of electromagnetic field distribution inside the NRs show a low density of photo

SUBMITTER: Evropeitsev EA 

PROVIDER: S-EPMC7643183 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature