Quantum dot optical devices with enhanced gain and sensitivity and methods of making same
First Claim
1. A device comprising:
- an array of conductive regions forming a first portion of a monolithic integrated circuit, the array of conductive regions comprising pixel regions;
an optically sensitive material formed over at least a portion of the monolithic integrated circuit and in electrical communication with at least one conductive region of the array of conductive regions; and
a readout circuit formed on the monolithic integrated circuit, the readout circuit to activate at least one pixel in the array of pixel regions by applying an electrical signal to a control lead in electrical communication with the at least one pixel so that current flows through the optically sensitive layer and the at least one pixel.
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Accused Products
Abstract
Optical and optoelectronic devices and methods of making same. Under one aspect, an optical device includes an integrated circuit an array of conductive regions; and an optically sensitive material over at least a portion of the integrated circuit and in electrical communication with at least one conductive region of the array of conductive regions. Under another aspect, a method of forming a nanocrystalline film includes fabricating a plurality of nanocrystals having a plurality of first ligands attached to their outer surfaces; exchanging the first ligands for second ligands of different chemical composition than the first ligands; forming a film of the ligand-exchanged nanocrystals; removing the second ligands; and fusing the cores of adjacent nanocrystals in the film to form an electrical network of fused nanocrystals. Under another aspect, a film includes a network of fused nanocrystals, the nanocrystals having a core and an outer surface, wherein the core of at least a portion of the fused nanocrystals is in direct physical contact and electrical communication with the core of at least one adjacent fused nanocrystal, and wherein the film has substantially no defect states in the regions where the cores of the nanocrystals are fused.
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Citations
53 Claims
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1. A device comprising:
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an array of conductive regions forming a first portion of a monolithic integrated circuit, the array of conductive regions comprising pixel regions; an optically sensitive material formed over at least a portion of the monolithic integrated circuit and in electrical communication with at least one conductive region of the array of conductive regions; and a readout circuit formed on the monolithic integrated circuit, the readout circuit to activate at least one pixel in the array of pixel regions by applying an electrical signal to a control lead in electrical communication with the at least one pixel so that current flows through the optically sensitive layer and the at least one pixel. - 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, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A device comprising:
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a plurality of electrodes; and an optically sensitive layer between and in electrical communication with at least ones of the plurality of electrodes, the at least ones of the plurality of electrodes to provide a signal indicative of radiation absorbed by the optically sensitive layer, the optically sensitive layer to provide providing a photoconductive gain of at least about 100 A/W, the optically sensitive layer and the plurality of electrodes forming an array of pixel regions; and a readout circuit to activate at least one pixel in the array of pixel regions by applying an electrical signal to a control lead in electrical communication with the at least one pixel so that current flows through at least a portion of the optically sensitive layer and the at least one pixel. - View Dependent Claims (42, 43, 44)
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45. A device comprising:
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a plurality of electrodes; and an optically sensitive layer between and in electrical communication with at least ones of the plurality of electrodes, the at least ones of the plurality of electrodes to provide a signal indicative of radiation absorbed by the optically sensitive layer, the optically sensitive layer capable of a noise equivalent exposure of less than about 10−
11 J/cm2 between the wavelengths of 400 nm and 800 nm, the optically sensitive layer and the plurality of electrodes forming an array of pixel regions; anda readout circuit to activate at least one pixel in the array of pixel regions by applying an electrical signal to a control lead in electrical communication with the at least one pixel so that current flows through at least a portion of the optically sensitive layer and the at least one pixel. - View Dependent Claims (46, 47, 48, 49, 50)
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51. A device comprising:
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a plurality of electrodes; and an optically sensitive layer between and in electrical communication with at least ones of the plurality of electrodes, the at least ones of the plurality of electrodes for providing to provide a signal indicative of radiation absorbed by the optically sensitive layer, the optically sensitive layer capable of a carrier mobility of greater than about 0.001 cm cm2/Vs, the optically sensitive layer and the plurality of electrodes forming an array of pixel regions; and a readout circuit to activate at least one pixel in the array of pixel regions by applying an electrical signal to a control lead in electrical communication with the at least one pixel so that current flows through at least a portion of the optically sensitive layer and the at least one pixel. - View Dependent Claims (52, 53)
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Specification