Broadband visible light source based on AllnGaN light emitting diodes
First Claim
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1. A visible light source device, comprising:
- a substrate layer comprising a top and bottom, a GaN buffer layer grown on the top of said substrate layer, a GaN layer grown on said GaN buffer layer, a n-Al0.2Ga0.8N layer grown on said GaN layer, a semiconductor quantum well structure grown on said n-Al0.2Ga0.8N layer, a p-Al0.2Ga0.8N layer grown on said semiconductor quantum well structure, a p-Al0.1Ga0.9N layer grown on said p-Al0.2Ga0.8N layer, a p-GaN contact layer; and
a nanocluster film having strong absorption in the ultraviolet wavelength range and strong emission in the visible wavelength range deposited on the bottom of said substrate layer.
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Abstract
A visible light source device is described based on a light emitting diode and a nanocluster-based film. The light emitting diode utilizes a semiconductor quantum well structure between n-type and p-type semiconductor materials on the top surface a substrate such as sapphire. The nanocluster-based film is deposited on the bottom surface of the substrate and can be derived from a solution of MoS2, MoSe2, WS2, and WSe2 particles of size greater than approximately 2 nm in diameter and less than approximately 15 nm in diameter, having an absorption wavelength greater than approximately 300 nm and less than approximately 650 nm.
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19 Claims
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1. A visible light source device, comprising:
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a substrate layer comprising a top and bottom, a GaN buffer layer grown on the top of said substrate layer, a GaN layer grown on said GaN buffer layer, a n-Al0.2Ga0.8N layer grown on said GaN layer, a semiconductor quantum well structure grown on said n-Al0.2Ga0.8N layer, a p-Al0.2Ga0.8N layer grown on said semiconductor quantum well structure, a p-Al0.1Ga0.9N layer grown on said p-Al0.2Ga0.8N layer, a p-GaN contact layer; and
a nanocluster film having strong absorption in the ultraviolet wavelength range and strong emission in the visible wavelength range deposited on the bottom of said substrate layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification