Color-conversion efficiency enhancement of quantum dots via selective area nano-rods light-emitting diodes

Che Yu Liu, Tzu Pei Chen, Tsung-Sheng Kao, Jhih Kai Huang, Hao-Chung Kuo, Yang Fang Chen, Chun Yen Chang

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

A large enhancement of color-conversion efficiency of colloidal quantum dots in light-emitting diodes (LEDs) with novel structures of nanorods embedded in microholes has been demonstrated. Via the integration of nano-imprint and photolithography technologies, nanorods structures can be fabricated at specific locations, generating functional nanostructured LEDs for high-efficiency performance. With the novel structured LED, the color-conversion efficiency of the existing quantum dots can be enhanced by up to 32.4%. The underlying mechanisms can be attributed to the enhanced light extraction and non-radiative energy transfer, characterized by conducting a series of electroluminescence and time-resolved photoluminescence measurements. This hybrid nanostructured device therefore exhibits a great potential for the application of multi-color lighting sources.

Original languageEnglish
Pages (from-to)19978-19987
Number of pages10
JournalOptics Express
Volume24
Issue number17
DOIs
StatePublished - 22 Aug 2016

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