Please use this identifier to cite or link to this item:
|Title:||Phosphor-free apple-white LEDs with embedded indium-rich nanostructures grown on strain relaxed nano-epitaxy GaN|
|Citation:||Soh, C.B., Liu, W., Yong, A.M., Chua, S.J., Chow, S.Y., Tripathy, S., Tan, R.J.N. (2010-11). Phosphor-free apple-white LEDs with embedded indium-rich nanostructures grown on strain relaxed nano-epitaxy GaN. Nanoscale Research Letters 5 (11) : 1788-1794. ScholarBank@NUS Repository. https://doi.org/10.1007/s11671-010-9712-0|
|Abstract:||Phosphor-free apple-white light emitting diodes have been fabricated using a dual stacked InGaN/GaN multiple quantum wells comprising of a lower set of long wavelength emitting indium-rich nanostructures incorporated in multiple quantum wells with an upper set of cyan-green emitting multiple quantum wells. The light-emitting diodes were grown on nano-epitaxially lateral overgrown GaN template formed by regrowth of GaN over SiO 2 film patterned with an anodic aluminum oxide mask with holes of 125 nm diameter and a period of 250 nm. The growth of InGaN/GaN multiple quantum wells on these stress relaxed low defect density templates improves the internal quantum efficiency by 15% for the cyan-green multiple quantum wells. Higher emission intensity with redshift in the PL peak emission wavelength is obtained for the indium-rich nanostructures incorporated in multiple quantum wells. The quantum wells grown on the nano-epitaxially lateral overgrown GaN has a weaker piezoelectric field and hence shows a minimal peak shift with application of higher injection current. An enhancement of external quantum efficiency is achieved for the apple-white light emitting diodes grown on the nano-epitaxially lateral overgrown GaN template based on the light -output power measurement. The improvement in light extraction efficiency, η extraction, was found to be 34% for the cyan-green emission peak and 15% from the broad long wavelength emission with optimized lattice period. © 2010 The Author(s).|
|Source Title:||Nanoscale Research Letters|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Aug 16, 2018
WEB OF SCIENCETM
checked on Jul 31, 2018
checked on Jul 6, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.