Color-conversion efficiency enhancement of quantum dots via selective area nano-rods light-emitting diodes
Journal
Optics Express
Journal Volume
24
Journal Issue
17
Pages
19978-19987
Date Issued
2016
Author(s)
Liu, Che-Yu
Chen, Tzu-Pei
Kao, Tsung Sheng
Huang, Jhih-Kai
Kuo, Hao-Chung
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.
SDGs
Type
journal article