公开(公告)号：US20140167601A1

公开(公告)日：2014-06-19

申请号：US13719645

申请日：2012-12-19

Applicant: Cree, Inc.

Inventor： Seibel Harry ,  David Clatterbuck ,  Brian Collins ,  Michael John Bergmann

IPC: H05B33/14

CPC classification number: H01L33/504 ,  C09K11/0883 ,  C09K11/7734 ,  H01L2224/48091 ,  H01L2224/8592 ,  H01L2924/00014

Abstract: Light emitting devices include an LED that emits light having a dominant wavelength in the blue color range and a recipient luminophoric medium that is configured to down-convert at least some of the light emitted by the LED. In these devices, the recipient luminophoric medium may include at least a green phosphor that down-converts the radiation emitted by the LED to radiation having a peak wavelength that is between about 525 nanometers and about 545 nanometers, a yellow phosphor that down-converts the radiation emitted by the LED to radiation having a peak wavelength that is between about 550 nanometers and about 570 nanometers, and a red (Ca1-x-ySrxEu2+y)SiAlN3 phosphor. The red (Ca1-x-ySrxEu2+y)SiAlN3 phosphor may have a europium content of at least 0.025.

Abstract translation: 发光装置包括发射蓝色区域中的主波长的光的LED和被配置为对由LED发射的至少一些光进行下变频的接收器发光体。 在这些装置中，受体发光介质可以包括至少一个绿色磷光体，其将由LED发射的辐射下转换成具有在约525纳米至约545纳米之间的峰值波长的辐射，黄色磷光体将 由LED发射的辐射具有在约550纳米至约570纳米之间的峰值波长的辐射，以及红色（Ca1-x-ySrxEu2 + y）SiAlN3荧光体。 红色（Ca1-x-ySrxEu2 + y）SiAlN3荧光体的铕含量可以至少为0.025。