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

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 Ra = 84.36. The results suggest a potential application of nanocomposite based WLEDs in efficient solid-state lighting.


Keywords


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

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References


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DOI: https://doi.org/10.15625/0868-3166/23/1/2610 Display counter: Abstract : 98 views. PDF : 36 views.

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