Light emitting devices with optical elements and bonding layers
First Claim
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1. A light emitting device having a stack of layers including semiconductor layers comprising an active region, said device comprising:
- a transparent optical element bonded to a surface of the stack by a bonding layer, wherein the transparent optical element does not extend over sides of the stack of layers, and wherein the bonding layer is selected from the group consisting of glass having an optical index greater than 1.8, Schott glass SF59, Schott glass LaSF 3, and Schott glass LaSF N18.
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Abstract
Light emitting devices with improved light extraction efficiency are provided. The light emitting devices have a stack of layers including semiconductor layers comprising an active region. The stack is bonded to a transparent optical element.
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Citations
13 Claims
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1. A light emitting device having a stack of layers including semiconductor layers comprising an active region, said device comprising:
a transparent optical element bonded to a surface of the stack by a bonding layer, wherein the transparent optical element does not extend over sides of the stack of layers, and wherein the bonding layer is selected from the group consisting of glass having an optical index greater than 1.8, Schott glass SF59, Schott glass LaSF 3, and Schott glass LaSF N18. - View Dependent Claims (2, 3, 4, 5)
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6. A light emitting device having a stack of layers including semiconductor layers comprising an active region, said device comprising:
a transparent optical element bonded to a surface of the stack by a bonding layer, wherein the bonding layer is selected from the group consisting of metal oxide, tungsten oxide, titanium oxide, nickel oxide, zirconium oxide, indium tin oxide, and chromium oxide. - View Dependent Claims (7, 8, 9, 10)
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11. A light emitting device having a stack of layers including semiconductor layers comprising an active region, said device comprising:
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a transparent optical element bonded to a surface of the stack by a bonding layer, wherein the bonding layer includes luminescent material, wherein a smallest ratio of a length of a base of said optical element to a length of said surface is greater than one, and wherein the transparent optical element does not extend over sides of the stack of layers. - View Dependent Claims (12, 13)
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Specification