发明授权
- 专利标题： Luminescent materials that emit light in the visible range or the near infrared range
- 专利标题（中）： 在可见光范围或近红外范围内发光的发光材料
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申请号： US11689381申请日： 2007-03-21
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公开(公告)号： US07641815B2公开(公告)日： 2010-01-05
- 发明人: John Varadarajan , Mirna Resan , Fanxin Wu , William M. Pfenninger , Nemanja Vockic , John Kenney
- 申请人： John Varadarajan , Mirna Resan , Fanxin Wu , William M. Pfenninger , Nemanja Vockic , John Kenney
- 申请人地址： US CA Menlo Park
- 专利权人： Ultradots, Inc.
- 当前专利权人： Ultradots, Inc.
- 当前专利权人地址： US CA Menlo Park
- 代理机构： Cooley Godward Kronish LLP
- 主分类号： C09K11/66
- IPC分类号： C09K11/66 ; C09K11/61 ; C09K11/55
摘要：
Luminescent materials and the use of such materials in anti-counterfeiting, inventory, photovoltaic, and other applications are described herein. In one embodiment, a luminescent material has the formula: [AaBbXxX′x′X″x″][dopants], wherein A is selected from at least one of elements of Group IA; B is selected from at least one of elements of Group VA, elements of Group IB, elements of Group IIB, elements of Group IIIB, elements of Group IVB, and elements of Group VB; X, X′, and X″ are independently selected from at least one of elements of Group VIIB; the dopants include electron acceptors and electron donors; a is in the range of 1 to 9; b is in the range of 1 to 5; and x, x′, and x″ have a sum in the range of 1 to 9. The luminescent material exhibits photoluminescence having: (a) a quantum efficiency of at least 20 percent; (b) a spectral width no greater than 100 nm at Full Width at Half Maximum; and (c) a peak emission wavelength in the near infrared range.
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