# US 2013/0152992 A1 · Solar cell system

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- Number: US 2013/0152992 A1
- Document ID: US20130152992A1
- Status: Published application
- Kind: A1
- Application number: 13/572,766
- Filed: 2012-08-13
- Published: 2013-06-20
- Earliest claimed: 2011-12-16
- Assignees: Hon Hai Precision Industry Co., Ltd.; Tsinghua University
- Inventors: YUAN-HAO JIN; QUN-QING LI; SHOU-SHAN FAN
- Web page: https://patentgrep.com/patent/US20130152992A1

## CPC

- H10F 10/14: Photovoltaic cells having only PN homojunction potential barriers
- H10F 10/142: comprising multiple PN homojunctions, e.g. tandem cells
- H10F 71/121: {The active layers comprising only Group IV materials}
- H10F 77/211: {for photovoltaic cells}
- Y02E 10/544: Solar cells from Group III-V materials
- Y02E 10/547: Monocrystalline silicon PV cells
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- 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 solar cell system includes a number of P-N junction cells, a number of inner electrodes, a first collecting electrode and a second collecting electrode. The number of the P-N junction cells is M. M is equal to or greater than 2. The M P-N junction cells are arranged from a first P-N junction cell to an Mth P-N junction cell along a straight line. The P-N junction cells are arranged in series along the straight line. The number of the inner electrodes is M−1. At least one inner electrode includes a carbon nanotube array. A first collecting electrode located on an outside surface of the first P-N junction cell. A second collecting electrode located on an outside surface of the Mth P-N junction cell. A photoreceptive surface is parallel to the straight line.

## Claims

### Claim 1

A solar cell system comprising:
a plurality of P-N junction cells comprising M number of P-N junction cells, M being equal to or greater than 2, the plurality of P-N junction cells being arranged from a first P-N junction cell to a Mth P-N junction cell along a straight line and electrically connected to each other in series;
an inner electrode between adjacent two of the plurality of P-N junction cells, a number of the inner electrode being M−1, at least one of the inner electrode comprising an array of carbon nanotubes comprising a plurality of carbon nanotubes;
a first collecting electrode on an outside surface of the first P-N junction cell;
a second collecting electrode on an outside surface of the Mth P-N junction cell; and
a photoreceptive surface configured to directly receive incident light beams, the photoreceptive surface being parallel to the straight line.

### Claim 2 (depends on 1)

The solar cell system of claim 1, wherein axial directions of the plurality of carbon nanotubes are parallel to the straight line.

### Claim 3 (depends on 1)

The solar cell system of claim 1, wherein the plurality of carbon nanotubes are open in at least one ends.

### Claim 4 (depends on 1)

The solar cell system of claim 1, wherein the plurality of carbon nanotubes are metallic.

### Claim 5 (depends on 1)

The solar cell system of claim 1, further comprising a metal layer between the array of carbon nanotubes of the least one inner electrode and the plurality of P-N junction cells.

### Claim 6 (depends on 5)

The solar cell system of claim 5, wherein the metal layer comprises a plurality of metal particles being deposited on ends of the plurality of carbon nanotubes in the array of carbon nanotubes.

### Claim 7 (depends on 1)

The solar cell system of claim 1, wherein lengths of the plurality of carbon nanotubes in the array of carbon nanotubes are in a range from about 100 micrometers to about 400 micrometers.

### Claim 8 (depends on 1)

The solar cell system of claim 1, wherein the first collecting electrode and the second collecting electrode are made of metal or carbon nanotubes.

### Claim 9 (depends on 1)

The solar cell system of claim 1, wherein at least one inner electrode consists of the carbon nanotube array.

### Claim 10 (depends on 1)

The solar cell system of claim 1, wherein each of the inner electrode comprises the array of carbon nanotubes.

### Claim 11 (depends on 1)

The solar cell system of claim 1, wherein at least one of the inner electrode is made of a carbon nanotube composite material.

### Claim 12 (depends on 11)

The solar cell system of claim 11, wherein the carbon nanotube composite material comprises the array of carbon nanotubes and a conductive material between the plurality of carbon nanotubes in the array of carbon nanotubes.

### Claim 13 (depends on 12)

The solar cell system of claim 12, wherein the conductive material is polymeric complex material or a metal of a low melting point.

### Claim 14 (depends on 1)

The solar cell system of claim 1, wherein each of the plurality of P-N junctions and a adjacent one of the plurality of P-N junctions are partially overlapped.

### Claim 15

A solar cell system comprises:
a plurality of P-N junction cells comprising M number of P-N junction cells, M being equal to or greater than 2, the plurality of P-N junction cells being arranged from a first P-N junction cell to an Mth P-N junction cell along a straight line and electrically connected to each other in series;
an inner electrode each adjacent two of the plurality of P-N junction cells, a number of the inner electrode being M−1, and each of the inner electrode comprising an array of carbon nanotubes;
a first collecting electrode on an outside surface of the first P-N junction cell;
a second collecting electrode on an outside surface of the Mth P-N junction cell; and
a photoreceptive surface configured to directly receive incident light beams, the photoreceptive surface being parallel to the straight line.