Invention Grant
- Patent Title: Luminescent materials that emit light in the visible range or the near infrared range
- Patent Title (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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Application No.: US11689381Application Date: 2007-03-21
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Publication No.: US07641815B2Publication Date: 2010-01-05
- Inventor: John Varadarajan , Mirna Resan , Fanxin Wu , William M. Pfenninger , Nemanja Vockic , John Kenney
- Applicant: John Varadarajan , Mirna Resan , Fanxin Wu , William M. Pfenninger , Nemanja Vockic , John Kenney
- Applicant Address: US CA Menlo Park
- Assignee: Ultradots, Inc.
- Current Assignee: Ultradots, Inc.
- Current Assignee Address: US CA Menlo Park
- Agency: Cooley Godward Kronish LLP
- Main IPC: C09K11/66
- IPC: C09K11/66 ; C09K11/61 ; C09K11/55
Abstract:
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.
Public/Granted literature
- US20080014463A1 LUMINESCENT MATERIALS THAT EMIT LIGHT IN THE VISIBLE RANGE OR THE NEAR INFRARED RANGE Public/Granted day:2008-01-17
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