# US 10,770,670 B2 · Inverted organic photosensitive devices

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- Number: US 10,770,670 B2
- Document ID: US10770670B2
- Status: Granted
- Kind: B2
- Application number: 15/332,062
- Filed: 2016-10-24
- Published: 2017-02-09
- Granted: 2020-09-08
- Earliest claimed: 2008-10-27
- Assignees: The Regents of the University of Michigan
- Applicants: The Regents of the University of Michigan
- Inventors: Stephen R. Forrest; Rhonda F. Bailey-Salzman
- Web page: https://patentgrep.com/patent/US10770670B2

## CPC

- H10K 30/57: comprising multiple junctions, e.g. tandem PV cells
- H10K 30/20: comprising organic-organic junctions, e.g. donor-acceptor junctions
- H10K 30/211: {comprising multiple junctions, e.g. double heterojunctions}
- H10K 30/353: {comprising blocking layers, e.g. exciton blocking layers}
- H10K 30/81: Electrodes
- H10K 30/82: Transparent electrodes, e.g. indium tin oxide [ITO] electrodes
- H10K 85/311: {Phthalocyanine}
- H10K 85/6572: {comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole}
- H10P 32/16: between a solid phase and a liquid phase
- H10P 32/19: {Diffusion sources}
- H10K 30/50: Photovoltaic [PV] devices
- H10K 85/621: {Aromatic anhydride or imide compounds, e.g. perylene tetra-carboxylic dianhydride or perylene tetracarboxylic di-imide}
- Y02E 10/549: Organic PV cells
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10P: GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present disclosure relates to organic photosensitive optoelectronic devices grown in an inverted manner. An inverted organic photosensitive optoelectronic device of the present disclosure comprises a reflective electrode, an organic donor-acceptor heterojunction over the reflective electrode, and a transparent electrode on top of the donor-acceptor heterojunction.

## Claims

### Claim 1

A method for producing an inverted, organic photovoltaic device, said method comprising:
providing a metal reflective electrode;
performing at least an ultra-violet ozone (UV-O3) surface treatment on said metal reflective electrode;
forming an organic donor-acceptor heterojunction over said metal reflective electrode;
and forming a transparent electrode over said organic donor-acceptor heterojunction.

### Claim 2 (depends on 1)

The method of claim 1, wherein the reflective electrode is positioned over a substrate.

### Claim 3 (depends on 1)

The method of claim 1, wherein the donor of the organic donor-acceptor heterojunction comprises a material selected from phthalocyanines, porphyrins, subphthalocyanines, and derivatives or transition metal complexes thereof.

### Claim 4 (depends on 1)

The method of claim 1, wherein the donor of the donor-acceptor heterojunction comprises copper phthalocyanine.

### Claim 5 (depends on 1)

The method of claim 1, wherein the acceptor of the organic donor-acceptor heterojunction comprises a material selected from polymeric or non-polymeric perylenes, naphthalenes, and fullerenes.

### Claim 6 (depends on 1)

The method of claim 1, wherein the acceptor of the organic donor-acceptor heterojunction comprises 3,4,9,10-perylenetetracarboxylic bis-benzimidazole.

### Claim 7 (depends on 1)

The method of claim 1, wherein the transparent electrode comprises a material selected from transparent oxides and metal or metal substitutes.

### Claim 8 (depends on 1)

The photosensitive device of claim 1, wherein the transparent electrode permits at least about 50% of ambient electromagnetic radiation to be transmitted through said electrode.

### Claim 9 (depends on 1)

The method of claim 1, wherein the transparent electrode comprises a material selected from tin oxide, gallium indium tin oxide, and zinc indium tin oxide.

### Claim 10 (depends on 1)

The method of claim 1, further comprising the step of providing an exciton blocking layer.

### Claim 11 (depends on 10)

The method of claim 10, wherein the exciton blocking layer is positioned between the reflective electrode and the transparent electrode.

### Claim 12 (depends on 10)

The method of claim 10, wherein the exciton blocking layer is positioned between the acceptor of the organic donor-acceptor heterojunction and the transparent electrode.

### Claim 13 (depends on 10)

The method of claim 10, wherein the exciton blocking layer comprises a material selected from N,N′-diphenyl-N,N′-bis-alpha-naphthylbenzidine, aluminum tris (8-hydroxyquinoline), carbazole biphenyl, bathocuproine, and tris(acetylacetonato) ruthenium (III).

### Claim 14 (depends on 1)

The method of claim 1, wherein the organic donor-acceptor heterojunction comprises a structure selected from planar heterojunctions, bulk heterojunctions, nanocrystalline bulk heterojunctions, hybrid planar-mixed heterojunctions, and mixed heterojunctions.

### Claim 15 (depends on 1)

The method of claim 1, further comprising performing a plasma treatment before performing the UV-O3 surface treatment on the reflective electrode.

### Claim 16 (depends on 15)

The method of claim 15, wherein the plasma surface treatment is selected from oxygen plasma treatment and argon plasma treatment.

### Claim 17 (depends on 1)

The method of claim 1, wherein the metal reflective electrode is a metal anode.

### Claim 18 (depends on 1)

The method of claim 1, wherein the metal reflective electrode comprises a metal chosen from nickel, silver, aluminum, magnesium, indium, and mixtures or alloys thereof.