# US 2019/0173031 A1 · Photodetectors and photovoltaics based on semiconductor nanocrystals

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- Number: US 2019/0173031 A1
- Document ID: US20190173031A1
- Status: Published application
- Kind: A1
- Application number: 16/153,858
- Filed: 2018-10-08
- Published: 2019-06-06
- Earliest claimed: 2007-04-18
- Assignees: InVisage Technologies, Inc.
- Applicants: InVisage Technologies Inc.
- Inventors: Edward Hartley Sargent; Ghada Koleilat; Larissa Levina
- Web page: https://patentgrep.com/patent/US20190173031A1

## CPC

- H10K 30/10: comprising heterojunctions between organic semiconductors and inorganic semiconductors
- B82Y 20/00: Nanooptics, e.g. quantum optics or photonic crystals
- B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites
- H04N 25/76: Addressed sensors, e.g. MOS or CMOS sensors
- H10F 10/18: Photovoltaic cells having only Schottky potential barriers
- H10F 77/126: {comprising only Group I-III-VI chalcopyrite materials, e.g. CuInSe2, CuGaSe2 or CuInGaSe2 [CIGS]}
- H10F 77/127: {comprising only Group IV-VI or only Group II-IV-VI chalcogenide materials, e.g. PbSnTe}
- H10F 77/14: Shape of semiconductor bodies; Shapes, relative sizes or dispositions of semiconductor regions within semiconductor bodies
- H10F 77/162: Non-monocrystalline materials, e.g. semiconductor particles embedded in insulating materials (H10F77/169 takes precedence)
- H10K 30/81: Electrodes
- H10K 30/50: Photovoltaic [PV] devices
- H10K 85/211: {Fullerenes, e.g. C60}
- H10K 85/341: {Transition metal complexes, e.g. Ru(II)polypyridine complexes (H10K85/331 takes precedence)}
- Y02E 10/541: CuInSe2 material PV cells
- Y02E 10/549: Organic PV cells
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A composite material is described. The composite material comprises semiconductor nanocrystals, and organic molecules that passivate the surfaces of the semiconductor nanocrystals. One or more properties of the organic molecules facilitate the transfer of charge between the semiconductor nanocrystals. A semiconductor material is described that comprises p-type semiconductor material including semiconductor nanocrystals. At least one property of the semiconductor material results in a mobility of electrons in the semiconductor material being greater than or equal to a mobility of holes. A semiconductor material is described that comprises n-type semiconductor material including semiconductor nanocrystals. At least one property of the semiconductor material results in a mobility of holes in the semiconductor material being greater than or equal to a mobility of electrons.

## Claims

### Claim 1

A composite material comprising:
semiconductor nanocrystals; and
organic molecules having a bidentate form configured to cross-link the semiconductor nanocrystals.

### Claim 2 (depends on 1)

The material according to claim 1, wherein the organic molecules facilitate a transfer of charge between the semiconductor nanoparticles.

### Claim 3 (depends on 1)

The material according to claim 1, wherein the organic molecules passivate respective surfaces of the semiconductor nanocrystals.

### Claim 4 (depends on 1)

The material according to claim 1, wherein the organic molecules comprise first and second functional end groups that define the bidentate form, and a conjugated moiety coupled between the first and second functional groups.

### Claim 5 (depends on 1)

The material according to claim 1, wherein the organic molecules comprise a benzene ring.

### Claim 6 (depends on 5)

The material according to claim 5, wherein the organic molecules comprise at least one organic compound chosen from a list of organic compounds consisting of benzenedithiol, dibenzenedithiol, mercaptobenzoic acid, dicarboxybenzene, benzenediamine, and dibenzenediamine.

### Claim 7 (depends on 6)

The material according to claim 6, wherein the organic molecules comprise benzenedithiol.

### Claim 8 (depends on 1)

The material according to claim 1, wherein the semiconductor nanocrystals include at least one compound chosen from a list of compounds consisting of PbS, PbSe, PbTe, CdS, CdSe, CdTe, SnS, SnSe, SnTe, Si, GaAs, Bi2S3, Bi2Se3, CuInS2, CuInSe2, Cu(InGa)Se2 (CIGS), and CuGaSe2.

### Claim 9

An electronic device, comprising:
first and second electrodes; and
a film in contact with the first and second electrodes and comprising semiconductor nanocrystals and organic molecules having a bidentate form configured to cross-link the semiconductor nanocrystals.