Pulsed-laser micropatterned quantum-dot array for white light source

Sheng Wen Wang, Huang Yu Lin, Chien-Chung Lin, Tsung-Sheng Kao, Kuo Ju Chen, Hau Vei Han, Jie Ru Li, Po-Tsung Lee, Huang-Ming Chen, Ming Hui Hong, Hao-Chung Kuo*

*Corresponding author for this work

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

In this study, a novel photoluminescent quantum dots device with laser-processed microscale patterns has been demonstrated to be used as a white light emitting source. The pulsed laser ablation technique was employed to directly fabricate microscale square holes with nano-ripple structures onto the sapphire substrate of a flip-chip blue light-emitting diode, confining sprayed quantum dots into well-defined areas and eliminating the coffee ring effect. The electroluminescence characterizations showed that the white light emission from the developed photoluminescent quantum-dot light-emitting diode exhibits stable emission at different driving currents. With a flexibility of controlling the quantum dots proportions in the patterned square holes, our developed white-light emitting source not only can be employed in the display applications with color triangle enlarged by 47% compared with the NTSC standard, but also provide the great potential in future lighting industry with the correlated color temperature continuously changed in a wide range.

Original languageEnglish
Article number23563
JournalScientific Reports
Volume6
DOIs
StatePublished - 23 Mar 2016

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