Organic - Inorganic Hybrid Luminescent Composite for Solid-state Lighting

Do Ngoc Chung; Le Trac Tuan; Tran Cong Hao; Do Ngoc Hieu; Nguyen Nang Dinh; Pham Hong Duong

doi:10.15625/0868-3166/23/1/2610

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Authors

Do Ngoc Chung University of Engineering and Technology
Le Trac Tuan
Tran Cong Hao University of Engineering and Technology, Vietnam National University, Hanoi
Do Ngoc Hieu University of Engineering and Technology, Vietnam National University, Hanoi
Nguyen Nang Dinh University of Engineering and Technology, Vietnam National University, Hanoi
Pham Hong Duong Institute of Materials Science, Vietnam Academy of Science and Technology

DOI:

https://doi.org/10.15625/0868-3166/23/1/2610

Keywords:

Solid state lighting, organic and inorganic hybrid composite, white light-emitting diodes.

Abstract

White light emitting diodes (WLEDs) made by coating organic and inorganic hybrid composites on blue LED chips. Y₃Al₅O₁₂:Ce (YAG:Ce) nano inorganic powder prepared by low-temperature Sol-Gel method exhibited broad green emission with the peak at 521 nm. Poly[2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) polymer has high luminescence efficiency and red emission peak at 590 nm. The white light was obtained by mixing blue light from emission of the blue LED chip - Indium Gallium Nitride (InGaN) and green-red light from the fluorescence of nano- YAG:Ce and MEH-PPV polymer hybrid composite. The hybrid nanocomposite-based WLEDs exhibited broad band emission spectra from blue light to red wavelengths and provided the white light with a CIE-1931 coordinate of x = 0.2986, y = 0.2620 and a colour rendering index R_a = 84.36. The results suggest a potential application of nanocomposite based WLEDs in efficient solid-state lighting.

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