Organic electroluminescent devices with enhanced light extraction
First Claim
Patent Images
1. An organic electroluminescent light emitting device, comprising:
- a first electrode;
a second electrode;
at least one organic light emitting layer; and
an output coupler which reduces a Fresnel loss.
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Abstract
An organic light emitting diode containing a first electrode, a second electrode, at least one organic light emitting layer, and an output coupler which reduces a Fresnel loss is provided. The index of refraction of the output coupler is matched to that of the adjacent layer of the device. The output coupler may be a dimpled transparent material or a composite layer containing light scattering particles to also reduce a critical angle loss.
248 Citations
41 Claims
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1. An organic electroluminescent light emitting device, comprising:
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a first electrode;
a second electrode;
at least one organic light emitting layer; and
an output coupler which reduces a Fresnel loss. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. An organic electroluminescent light emitting device, comprising:
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a first electrode;
at least one organic light emitting layer over the first electrode;
a second transparent electrode over the at least one organic light emitting layer; and
a shaped transparent material which has corrugated or dimpled light emitting surface and which contains nanoparticles having a size of less than 100 nm over the second transparent electrode. - View Dependent Claims (27, 28, 29)
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30. An organic electroluminescent light emitting device, comprising:
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a first electrode;
at least one organic light emitting layer over the first electrode;
a second transparent electrode over the at least one organic light emitting layer; and
a matrix material containing light scattering particles over the second electrode. - View Dependent Claims (31, 32)
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33. A method of making an organic electroluminescent light emitting device, comprising:
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placing a first material into a mold cavity;
solidifying the first material to form a shaped transparent material having corrugated or dimpled first light emitting surface; and
attaching the shaped transparent material to the an organic electroluminescent light emitting device. - View Dependent Claims (34, 35, 36, 37, 38, 39)
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40. An organic electroluminescent light emitting device, comprising:
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a first electrode;
at least one organic light emitting layer over the first electrode;
a second transparent electrode over the at least one organic light emitting layer; and
a shaped transparent material whose index of refraction is selected to match that of an adjacent layer of the light emitting device. - View Dependent Claims (41)
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Specification