Nanosi Advanced Technologies, Inc.

King Saud University

Universidade Do Algarve

Salman A H Alrokayan

Munir H Nayfeh

Fouzi Mouffouk

Khalid Mustafa Abusalah

Ana M Rosa Da Costa

Nuno Rodrigues Dos Santos

An embodiment of the invention is luminescent silicon nanoparticle polymer composite that can serve as a wavelength converter or a UV absorber. The composite includes a polymer or an organosilicon compound; and within the polymer or organosilicon compound, a dispersion of luminescent silicon nanoparticles. In a preferred composite, the silicon nanoparticles have multiple Si&#x2014;H termination sites, the silicon nanoparticles being linked to a C site to produce a silicon carbide bond (Si&#x2014;C). In a preferred embodiment, the polymer comprises polyurethane. A composite of the invention can perform wavelength conversion. In a wavelength converted film of the invention, the silicon nanoparticles are incorporated into the polymer or organosilicon compound in a quantity sufficient for wavelength conversion but small enough to have no or an insubstantial effect on the properties of the polymer or the organosilicon compound. A white LED of the invention includes a light emitting diode having a narrow band wavelength output. A luminescent silicon wavelength converter includes a composite film as described above for converting the narrow band wavelength output into wide band wavelength output. In a preferred embodiment, the LED comprises a GaN LED, and the wavelength converter film is disposed on an active region of the LED.

Luminescent silicon nanoparticle-polymer composites, composite wavelength converter and white LED

Growing community of inventors

Riyadh, Saudi Arabia

Salman A H Alrokayan