Organic photosensitive optoelectronic device with an exciton blocking layer
AssigneeThe Trustees of Princeton University
InventorsStephen R. Forrest, Vladimir Bulovic, Peter Peumans
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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.
Claims24
An organic photosensitive optoelectronic device comprising:
- 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.
A stacked organic photosensitive optoelectronic device comprised of a plurality of photosensitive optoelectronic subcells wherein at least one subcell comprises:
- 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.
An organic photodetector comprising:
- a cathode and an anode in superposed relation;
- a plurality of pairs of a hole transporting layer adjacent to an electron transporting layer, the pairs disposed between the cathode and the anode;
- and
- an exciton blocking layer disposed between one of the cathode and the anode, and the plurality of pairs.
Dependencies are inferred from the claim text.