Light-emitting device containing flattened anisotropic colloidal semiconductor nanocrystals and processes for manufacturing such devices
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United States of America Patent
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Sep 20, 2016
Grant Date -
Dec 18, 2014
app pub date -
Jul 11, 2014
filing date -
Mar 19, 2012
priority date (Note) -
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Abstract
A device that emits light in response to an electrical or optical excitation, such as LEDs, displays, e-readers, device includes at least one anisotropic flat colloidal semiconductor nanocrystal whose smallest dimension, namely the thickness, is smaller than the other two by a factor of at least 1.5, the emitted light having an intensity and a polarization that vary according to the angle formed by the light emitting direction and the normal to the largest surface of the flat nanocrystal. The device allows to realize a light-emitting device exhibiting simultaneously a high emission spectral finesse and allows proper control of the wavelength, the directivity and/or polarization of the emitted light, and thus increases the brightness and color gamut of displays composed of such a device. Such devices are found for example in displays, televisions, mobile phones, tablets, or computers. The various embodiments of these devices are also presented.
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International Classification(s)
- C09K:MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED ....
- F21V:FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES....
- H01L:SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICE....
- B82Y:SPECIFIC USES OR APPLICATIONS OF NANO-STRUCTURES; ....
- H05B:ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE ....
- F21K:LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- G02F:DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF ....
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