# US 2009/0260679 A1 · Photovoltaic device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2009/0260679 A1
- Document ID: US20090260679A1
- Status: Published application
- Kind: A1
- Application number: 12/339,379
- Filed: 2008-12-19
- Published: 2009-10-22
- Earliest claimed: 2008-04-18
- Assignees: Tsinghua University; Hon Hai Precision Industry Co., Ltd.
- Inventors: HAI-LIN SUN; KAI-LI JIANG; QUN-QING LI; SHOU-SHAN FAN
- Web page: https://patentgrep.com/patent/US20090260679A1

## CPC

- H10F 77/70: Surface textures, e.g. pyramid structures
- B82Y 20/00: Nanooptics, e.g. quantum optics or photonic crystals
- G02B 6/1226: {involving surface plasmon interaction}
- H10F 77/148: {Shapes of potential barriers}
- H10F 77/211: {for photovoltaic cells}
- H10F 77/244: {made of transparent conductive layers, e.g. transparent conductive oxide [TCO] layers}
- H10F 10/14: Photovoltaic cells having only PN homojunction potential barriers
- Y02E 10/547: Monocrystalline silicon PV cells
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A photovoltaic device includes a substrate, a doped layer, a first electrode and a second electrode. The substrate has a plurality of cavities defined therein. The doped layer is in contact the substrate. The first electrode including a carbon nanotube composite material is adjacent to the substrate. The second electrode is attached to the substrate.

## Claims

### Claim 1

A photovoltaic device, comprising:
a substrate having a plurality of cavities defined therein;
a doped layer in contact the substrate;
a first electrode comprising a carbon nanotube composite material adjacent to the substrate; and
a second electrode attached to the substrate.

### Claim 2 (depends on 1)

The photovoltaic device as claimed in claim 1, wherein the substrate comprises p-type silicon.

### Claim 3 (depends on 1)

The photovoltaic device as claimed in claim 1, wherein a thickness of the substrate is in a range from about 200 μm to about 300 μm.

### Claim 4 (depends on 1)

The photovoltaic device as claimed in claim 1, wherein the cavities are spaced from each other by a distance in a range from about 10 μm to about 30 μm.

### Claim 5 (depends on 1)

The photovoltaic device as claimed in claim 1, wherein a depth of each of the cavities is in a range from about 50 μm to about 70 μm.

### Claim 6 (depends on 1)

The photovoltaic device as claimed in claim 1, wherein the doped layer comprises n-type silicon.

### Claim 7 (depends on 1)

The photovoltaic device as claimed in claim 1, wherein the carbon nanotube composite material comprises of a plurality of carbon nanotubes and a plurality of metal particles.

### Claim 8 (depends on 7)

The photovoltaic device as claimed in claim 7, wherein each metal particle comprises of a material that is selected from the group consisting of platinum, palladium, ruthenium, silver, gold, and any alloy thereof.

### Claim 9 (depends on 7)

The photovoltaic device as claimed in claim 7, wherein the metal particles have an average particle diameter in a range from about 1 nm to about 10 nm.

### Claim 10 (depends on 7)

The photovoltaic device as claimed in claim 7, wherein the carbon nanotubes are arranged in a disorderly fashion.

### Claim 11 (depends on 7)

The photovoltaic device as claimed in claim 7, wherein at least a portion of the carbon nanotubes are in a form of at least one film.

### Claim 12 (depends on 11)

The photovoltaic device as claimed in claim 11, wherein the at least one film comprises of a plurality of successively oriented carbon nanotube segments joined end-to-end by van der Waals attractive force.

### Claim 13 (depends on 12)

The photovoltaic device as claimed in claim 12, wherein each carbon nanotube segment comprises a plurality of carbon nanotubes substantially parallel to each other and with the same length.

### Claim 14 (depends on 11)

The photovoltaic device as claimed in claim 11, wherein there are two or more stacked films.

### Claim 15 (depends on 14)

The photovoltaic device as claimed in claim 14, wherein the carbon nanotubes of the adjacent films are set at an angle ranging from about 0 degrees to about 90 degrees.

### Claim 16 (depends on 1)

The photovoltaic device as claimed in claim 1, further comprising a third electrode electrically connected to the first electrode.

### Claim 17 (depends on 1)

The photovoltaic device as claimed in claim 1, further comprising an anti-reflection layer disposed on the first electrode.

### Claim 18 (depends on 17)

The photovoltaic device as claimed in claim 17, wherein the anti-reflection layer comprises of titanium dioxide or zinc aluminum oxide.