Visible light emitting diodes fabricated from soluble semiconducting polymers
First Claim
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1. A light-emitting diode which emits visible light and which turns on at voltages below 5 volts, comprising:
- i) a substrate;
ii) a transparent conducting first layer coated onto said substrate, said first layer having high work function and serving as a hole-injecting electrode;
iii) a transparent layer of a soluble semiconducting luminescent conjugated polymer fabricated onto the transparent conducting first layer; and
iv) an electron-injecting contact fabricated from a low work function metal onto the semiconducting conjugated polymer layer.
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Abstract
Visible light LEDs are produced having a layer of conjugated polymer which is cast directly from solution or formed as a gel-processed admixture with a carrier polymer. The LEDs can be formed so as to emit polarized light.
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Citations
69 Claims
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1. A light-emitting diode which emits visible light and which turns on at voltages below 5 volts, comprising:
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i) a substrate;
ii) a transparent conducting first layer coated onto said substrate, said first layer having high work function and serving as a hole-injecting electrode;
iii) a transparent layer of a soluble semiconducting luminescent conjugated polymer fabricated onto the transparent conducting first layer; and
iv) an electron-injecting contact fabricated from a low work function metal onto the semiconducting conjugated polymer layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A light-emitting diode which emits visible light and which turns on at voltages below 5 volts, comprising:
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i) a substrate;
ii) a transparent conducting first layer coated onto said substrate, said first layer having high work function and serving as a hole-injecting electrode;
iii) a transparent layer of a soluble semiconducting luminescent conjugated polymer fabricated onto the transparent conducting first layer; and
iv) an electron-injecting contact fabricated from calcium or a lower work function alkaline earth metal onto the semiconducting conjugated polymer layer. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A light-emitting diode which emits visible light and which turns on at voltages below 5 volts, comprising:
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i) a substrate;
ii) a transparent conducting first layer coated onto said substrate, said first layer having high work function and serving as a hole-injecting electrode;
iii) a transparent layer of a soluble semiconducting luminescent conjugated polymer fabricated onto the transparent conducting first layer; and
iv) an electron-injecting contact fabricated from calcium onto the semiconducting conjugated polymer layer. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
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32. A light-emitting diode which emits visible light and which turns on at voltages below 5 volts, comprising:
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i) a substrate;
ii) a transparent conducting first layer coated onto said substrate, said first layer having high work function and serving as a hole-injecting electrode;
iii) a transparent layer of a soluble semiconducting luminescent conjugated polymer fabricated onto the transparent conducting first layer; and
iv) an electron-injecting contact fabricated from barium onto the semiconducting conjugated polymer layer. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40)
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41. A light-emitting diode which emits visible light and which turns on at voltages below 5 volts, comprising:
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i) a substrate;
ii) a transparent conducting first layer coated onto said substrate, said first layer having high work function and serving as a hole-injecting electrode;
iii) a transparent layer of a soluble semiconducting luminescent conjugated polymer selected from the group consisting of soluble alkoxy derivatives of poly(phenylenevinylene) fabricated onto the transparent conducting first layer; and
iv) an electron-injecting contact fabricated from calcium or a lower work function alkaline earth metal onto the semiconducting conjugated polymer layer. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. A light-emitting diode which emits visible light and which turns on at voltages below 5 volts, comprising:
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i) a substrate;
ii) a transparent conducting first layer coated onto said substrate, said first layer having high work function and serving as a hole-injecting electrode;
iii) a transparent layer of a soluble semiconducting luminescent conjugated polymer selected from the group consisting of soluble alkoxy derivatives of poly(phenylenevinylene) fabricated onto the transparent conducting first layer; and
iv) an electron-injecting contact fabricated from calcium onto the semiconducting conjugated polymer layer. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59, 60)
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61. A light-emitting diode which emits visible light and which turns on at voltages below 5 volts, comprising:
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i) a substrate;
ii) a transparent conducting first layer coated onto said substrate, said first layer having high work function and serving as a hole-injecting electrode;
iii) a transparent layer of a soluble semiconducting luminescent conjugated polymer selected from the group consisting of soluble alkoxy derivatives of poly(phenylenevinylene) fabricated onto the transparent conducting first layer; and
iv) an electron-injecting contact fabricated from barium onto the semiconducting conjugated polymer layer. - View Dependent Claims (62, 63, 64, 65, 66, 67, 68, 69)
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Specification