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

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...

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Published inOptics express Vol. 24; no. 17; pp. 19978 - 19987
Main Authors Liu, Che-Yu, Chen, Tzu-Pei, Kao, Tsung Sheng, Huang, Jhih-Kai, Kuo, Hao-Chung, Chen, Yang-Fang, Chang, Chun-Yen
Format Journal Article
LanguageEnglish
Published United States 22.08.2016
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Summary: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.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.24.019978