Organic photosensitive optoelectronic device with a charge blocking layer
First Claim
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1. An organic photosensitive optoelectronic device comprising:
- an organic photodetector comprised of;
two electrodes in superposed relation;
a hole transport layer between the two electrodes, the hole transport layer formed of a first photoconductive organic semiconductor material;
an electron transport layer between the two electrodes and adjacent to the hole transport layer, the electron transport layer formed of a second photoconductive organic semiconductor material; and
at least one exciton blocking layer between the two electrodes and adjacent to at least one of the two electrodes.
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Abstract
Organic photosensitive optoelectronic devices (“OPODs”) which include an exciton blocking layer to enhance device efficiency. Single heterostructure, stacked and wave-guide type embodiments. Photodetector OPODs having multilayer structures and an exciton blocking layer. Guidelines for selection of exciton blocking layers are provided.
161 Citations
20 Claims
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1. An organic photosensitive optoelectronic device comprising:
- an organic photodetector comprised of;
two electrodes in superposed relation;
a hole transport layer between the two electrodes, the hole transport layer formed of a first photoconductive organic semiconductor material;
an electron transport layer between the two electrodes and adjacent to the hole transport layer, the electron transport layer formed of a second photoconductive organic semiconductor material; and
at least one exciton blocking layer between the two electrodes and adjacent to at least one of the two electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
the electron transport layer is 3,4,9,10-perylenetetracarboxylic-bis-benzimidazole;
the hole transport layer is copper phthalocyanine; and
the hole blocking layer is 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline.
- an organic photodetector comprised of;
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7. The device of claim 3 wherein:
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the electron transport layer is 3,4,9,10-perylenetetracarboxylic-bis-benzimidazole;
the hole transport layer is copper phthalocyanine; and
the electron blocking layer is selected from the group consisting of4,4′
,4″
-tris{N,-(3-methylphenyl)-N-phenylamino}triphenylamine or polyethylene dioxythiophene.
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8. The device of claim 1 wherein the electron transport layer, the hole transport layer, and the at least one eharge exciton blocking layer are disposed between two parallel planar reflective surfaces which form a waveguide.
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9. The device of claim 8 wherein one of the two reflective surfaces has an aperture to admit light incident upon the device.
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10. The device of claim 8 having a transparent opening between the two reflective surfaces so that light is admitted to the device from a direction parallel to the planes of the reflective surfaces.
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11. An organic photosensitive optoelectronic devise comprising:
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an organic solar cell comprised of;
two electrodes in superposed relation;
a hole transport layer between the two electrodes, the hole transport layer formed of a first photoconductor material;
an electron transport layer between the two electrodes and adjacent to the hole transport layer, the electron transport layer formed of a second photoconductive organic semiconductor material; and
at least one exciton blocking layer between the two electrodes and adjacent to at least one of the two electrodes. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
the electron transport layer is 3,4,9,10-perylenetetracarboxylic-bis-benzimidazole;
the hole transport layer is copper phthalocyanine; and
the hole blocking layer is 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline.
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17. The device of claim 13 wherein:
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the electron transport layer is 3,4,9,10-perylenetetracarboxylic-bis-benzimidazole;
the hole transport layer is copper phthalocyanine; and
the electron blocking layer is selected from the group consisting of 4,4′
,4″
-tris{N,-(3-methylphenyl)-N-phenylamino}triphenylamine or polyethylene dioxythiophene.
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18. The device of claim 11 wherein the electron transport layer, the hole transport layer, and the at least one exciton blocking layer are disposed between two parallel planar reflective surfaces which form a waveguide.
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19. The device of claim 18 wherein one of the reflective surfaces has an aperture to admit light incident upon the device.
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20. The device of claim 18 having a transparent opening between the two reflective surfaces so that light is admitted to the device from a direction parallel to the planes of the reflective surfaces.
Specification