Phosphor-free white-light emitters using in-situ GaN nanostructures grown by metal organic chemical vapor deposition.

Abstract:

:Realization of phosphor-free white-light emitters is becoming an important milestone on the road to achieve high quality and reliability in high-power white-light-emitting diodes (LEDs). However, most of reported methods have not been applied to practical use because of their difficulties and complexity. In this study we demonstrated a novel and practical growth method for phosphor-free white-light emitters without any external processing, using only in-situ high-density GaN nanostructures that were formed by overgrowth on a silicon nitride (SiNx) interlayer deposited by metal organic chemical vapor deposition. The nano-sized facets produced variations in the InGaN thickness and the indium concentration when an InGaN/GaN double heterostructure was monolithically grown on them, leading to white-color light emission. It is important to note that the in-situ SiNx interlayer not only facilitated the GaN nano-facet structure, but also blocked the propagation of dislocations.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Min D,Park D,Jang J,Lee K,Nam O

doi

10.1038/srep17372

subject

Has Abstract

pub_date

2015-12-02 00:00:00

pages

17372

issn

2045-2322

pii

srep17372

journal_volume

5

pub_type

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