Electrically driven green, olivine, and amber color nanopyramid light emitting diodes

Shih Pang Chang, Jet Rung Chang, Kuok Pan Sou, Mei Chun Liu, Yuh Jen Cheng, Hao-Chung Kuo, Chun Yen Chang

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

We report the fabrication and studies of electrically driven green, olivine, and amber color nanopyramid GaN light emitting diodes (LEDs). InGaN/GaN multiple quantum wells (MQWs) were grown on the nanopyramid semipolar facets. Compared with the commonly used (0001) c-plane MQWs, the semipolar facet has lower piezoelectric field, resulting in much faster radiative recombination efficiency. This is important for high In content MQWs. The measured internal quantum efficiencies for green, olivine, and amber color LED are 30%, 25%, and 21%, respectively. The radiative and non-radiative lifetime of the semipolar MQWs are also investigated.

Original languageEnglish
Pages (from-to)23030-23035
Number of pages6
JournalOptics Express
Volume21
Issue number20
DOIs
StatePublished - 7 Oct 2013

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