公开(公告)号：US11718788B2

公开(公告)日：2023-08-08

申请号：US17254225

申请日：2019-07-09

Applicant: GRIREM ADVANCED MATERIALS CO., LTD

Inventor： Ronghui Liu ,  Yuanhong Liu ,  Xiaoxia Chen ,  Xiaole Ma ,  Yuan Xue ,  Tongyu Gao

IPC: C09K11/77 ,  H01L33/26 ,  H01L33/50

CPC classification number: C09K11/7734 ,  C09K11/7792 ,  H01L33/26 ,  H01L33/502

Abstract: The present invention discloses a red light and near-infrared light-emitting material and a light-emitting device. The red light and near-infrared light-emitting material contains a compound represented by a molecular formula, xA2O3·yIn2O3·bR2O3, wherein the element A is Sc and/or Ga; the element R is one or two of Cr, Yb, Nd or Er and necessarily includes Cr; and 0.001≤x≤1, 0.001≤y≤1, 0.001≤b≤0.2, and 0.001≤b/(x+y)≤0.2. The light-emitting material can be excited by a technically mature blue light source to emit light with a high-intensity wide-spectrum or multiple spectra. Compared with existing materials, the light-emitting material has higher luminescent intensity. The light-emitting device uses an LED chip to combine an infrared light-emitting material and a visible light light-emitting material. In this way, the same LED chip can emit near-infrared light and visible light at the same time, which greatly simplifies the packaging process and reduces the packaging cost.