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1. 发明授权

US08076410B2 Luminescent silicon nanoparticle-polymer composites, composite wavelength converter and white LED 有权
标题翻译：发光硅纳米颗粒 - 聚合物复合材料，复合波长转换器和白光LED
公开(公告)号：US08076410B2
公开(公告)日：2011-12-13
申请号：US12241870
申请日：2008-09-30
申请人： Munir H. Nayfeh , Salman A. H. Alrokayan
发明人： Munir H. Nayfeh , Salman A. H. Alrokayan
IPC分类号： C08F292/00 , C09K11/59 , H01J1/63
CPC分类号： C09K11/02 , C09K11/59 , H01L33/502
摘要： 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—H termination sites, the silicon nanoparticles being linked to a C site to produce a silicon carbide bond (Si—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.
摘要翻译：本发明的一个实施方案是可用作波长转换器或UV吸收剂的发光硅纳米颗粒聚合物复合材料。复合材料包括聚合物或有机硅化合物; 并且在聚合物或有机硅化合物内，发光硅纳米颗粒的分散体。在优选的复合材料中，硅纳米颗粒具有多个Si-H终止位点，硅纳米颗粒与C位点连接以产生碳化硅键（Si-C）。在优选的实施方案中，聚合物包含聚氨酯。本发明的复合物可以进行波长转换。在本发明的波长转换膜中，将硅纳米颗粒掺入到聚合物或有机硅化合物中，其量足够于波长转换，但足够小以致对聚合物或有机硅化合物的性质没有或没有实质性的影响。本发明的白色LED包括具有窄带波长输出的发光二极管。发光硅波长转换器包括如上所述的用于将窄带波长输出转换成宽带波长输出的复合膜。在优选实施例中，LED包括GaN LED，并且波长转换器膜设置在LED的有源区上。

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