# US 2016/0254101 A1 · Organic photosensitive devices with exciton-blocking charge carrier filters

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- Number: US 2016/0254101 A1
- Document ID: US20160254101A1
- Status: Published application
- Kind: A1
- Application number: 15/030,881
- Filed: 2014-10-27
- Published: 2016-09-01
- Earliest claimed: 2013-04-12
- Inventors: Stephen R. Forrest; Xin Xiao; Jeramy D. Zimmerman; Kevin Bergemann; Anurag Panda; Brian E. Lassiter; Mark E. Thompson; Andrew N. Bartynski; Cong Trinh; Xiaozhou Che
- Web page: https://patentgrep.com/patent/US20160254101A1

## CPC

- H10K 30/211: {comprising multiple junctions, e.g. double heterojunctions}
- H10K 30/353: {comprising blocking layers, e.g. exciton blocking layers}
- H10K 30/57: comprising multiple junctions, e.g. tandem PV cells
- H10K 85/211: {Fullerenes, e.g. C60}
- H10K 2102/103: {comprising indium oxides, e.g. ITO}
- Y02E 10/549: Organic PV cells
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Disclosed herein are organic photosensitive devices including a first subcell and a second subcell and having at least one exciton-blocking charge carrier filter disposed between the subcells. The filters comprise a mixture of at least one wide energy gap material and at least one electron or hole conducting material. As described herein, the filters simultaneously block excitons and conduct the desired charge carrier (electrons or holes).

## Claims

### Claim 1

A photosensitive optoelectronic device comprising:
a first subcell comprising a first photoactive region;
a second subcell comprising a second photoactive region; and
an exciton-blocking electron filter comprising a mixture of:
a wide energy gap material; and
an electron conducting material;
wherein the exciton-blocking electron filter is disposed between the first subcell and the second subcell.

### Claim 2 (depends on 1)

The device of claim 1 wherein the exciton-blocking electron filter is transparent.

### Claim 3 (depends on 1)

The device of claim 1 wherein the exciton-blocking electron filter is optically lossless.

### Claim 4 (depends on 1)

The device of claim 1 further comprising a charge recombination layer disposed between the first subcell and the second subcell.

### Claim 5 (depends on 4)

The device of claim 4, wherein the charge recombination layer comprises Ag.

### Claim 6 (depends on 1)

The device of claim 1, wherein the device is a photovoltaic device.

### Claim 7

A photosensitive optoelectronic device comprising:
a first subcell comprising a first photoactive region;
a second subcell comprising a second photoactive region; and
an exciton-blocking hole filter comprising a mixture of:
a wide energy gap material; and
a hole conducting material;
wherein the exciton-blocking hole filter is disposed between the first subcell and the second subcell.

### Claim 8 (depends on 7)

The device of claim 7 wherein the exciton-blocking hole filter is transparent.

### Claim 9 (depends on 7)

The device of claim 7 wherein the exciton-blocking hole filter is optically lossless.

### Claim 10 (depends on 7)

The device of claim 7 further comprising a charge recombination layer disposed between the first subcell and the second subcell.

### Claim 11 (depends on 7)

The device of claim 7 further comprising
an exciton-blocking electron filter comprising a mixture of:
a wide energy gap material; and
an electron conducting material;
wherein the exciton-blocking electron filter is disposed between the first subcell and the second subcell.