公开(公告)号：US20070012928A1

公开(公告)日：2007-01-18

申请号：US11485335

申请日：2006-07-13

申请人： Zouyan Peng ,  Michael Locascio ,  Kwang-Ohk Cheon

发明人： Zouyan Peng ,  Michael Locascio ,  Kwang-Ohk Cheon

IPC分类号： H01L33/00

CPC分类号： H01L33/504 ,  B82Y20/00 ,  B82Y30/00

摘要： A white light light emitting diode (LED) formed by depositing an LED chip that emits light at a first wavelength and forming a semiconductor nanocrystal complex. The semiconductor nanocrystal complex absorbs at least a portion of the light emitted by the LED chip and emits light at a second wavelength. The semiconductor nanocrystal complex and a powdered phosphor are deposited over the LED chip. The powdered phosphor also absorbs a portion of the light emitted by the LED chip and emits light at a third wavelength. The semiconductor nanocrystal complex is selected to provide a color of the spectrum that is lacking from the combined output of phosphor/LED chip combination, to improve a Color Rating Index (CRI) value and to provide a “warmer” light. The semiconductor nanocrystal complex and the powdered phosphor can be mixed into the same matrix material or into separate matrix materials and/or deposited as separate layers.

摘要翻译： 一种白光发光二极管（LED），其通过沉积发射第一波长的光并形成半导体纳米晶体复合体的LED芯片形成。 半导体纳米晶体复合体吸收由LED芯片发射的光的至少一部分并发射第二波长的光。 半导体纳米晶体复合体和粉末状磷光体沉积在LED芯片上。 粉状磷光体还吸收由LED芯片发射的光的一部分并发射第三波长的光。 选择半导体纳米晶体复合体以提供从荧光体/ LED芯片组合的组合输出缺乏的光谱的颜色，以提高颜色等级指数（CRI）值并提供“更暖”的光。 半导体纳米晶体复合物和粉末状磷光体可以混合到相同的基质材料或分离的基质材料中和/或作为分开的层沉积。