# US 2010/0163104 A1 · Solar cell

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- Number: US 2010/0163104 A1
- Document ID: US20100163104A1
- Status: Published application
- Kind: A1
- Application number: 12/632,650
- Filed: 2009-12-07
- Published: 2010-07-01
- Earliest claimed: 2008-12-31
- Assignees: Mosel Vitelic, Inc.
- Inventors: Yu-Chu Tseng
- Web page: https://patentgrep.com/patent/US20100163104A1

## CPC

- H10F 77/211: {for photovoltaic cells}
- H10F 10/142: comprising multiple PN homojunctions, e.g. tandem cells
- H10F 77/45: Wavelength conversion means, e.g. by using luminescent material, fluorescent concentrators or up-conversion arrangements
- H10F 77/496: {Luminescent members, e.g. fluorescent sheets (wavelength conversion means for photovoltaic cells H10F77/45)}
- Y02E 10/52: PV systems with concentrators
- Y02E 10/544: Solar cells from Group III-V materials
- 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

## Abstract

A solar cell includes a semiconductor substrate, an emitter layer, an anti-reflective coating, a first electrode, a second electrode, and a first light conversion layer. The emitter layer is formed on a light-receiving side of the semiconductor substrate. A p-n junction is formed between the emitter layer and the semiconductor substrate. The anti-reflective coating is formed on the emitter layer. The first electrode is connected to the emitter layer. The second electrode is formed on a back-lighted side of the semiconductor substrate. The first light conversion layer is formed on the anti-reflective coating. The first light conversion layer absorbs a first light with a first wavelength and emits a second light with a second wavelength, thereby performing a photoelectric converting operation.

## Claims

### Claim 1

A solar cell comprising:
a semiconductor substrate;
an emitter layer formed on a light-receiving side of said semiconductor substrate, wherein a p-n junction is formed between said emitter layer and said semiconductor substrate;
an anti-reflective coating formed on said emitter layer;
a first electrode connected to said emitter layer;
a second electrode formed on a back-lighted side of said semiconductor substrate; and
a first light conversion layer formed on said anti-reflective coating, wherein said first light conversion layer absorbs a first light with a first wavelength and emits a second light with a second wavelength, thereby performing a photoelectric converting operation.

### Claim 2 (depends on 1)

The solar cell according to claim 1 further comprising a back surface field layer, which is formed between and connected with said semiconductor substrate and said second electrode.

### Claim 3 (depends on 1)

The solar cell according to claim 1 further comprising an encapsulation layer, which is made of a transparent material.

### Claim 4 (depends on 3)

The solar cell according to claim 3 wherein said transparent material includes glass.

### Claim 5 (depends on 3)

The solar cell according to claim 3 wherein said encapsulation layer is formed on said first light conversion layer.

### Claim 6 (depends on 1)

The solar cell according to claim 1 wherein said first light conversion layer is made of a down-conversion phosphor.

### Claim 7 (depends on 1)

The solar cell according to claim 1 further comprising a second light conversion layer formed on a back-lighted side of said semiconductor substrate.

### Claim 8 (depends on 7)

The solar cell according to claim 7 wherein said second light conversion layer is made of an up-conversion phosphor.

### Claim 9

A solar cell comprising:
a semiconductor substrate;
an emitter layer formed on a light-receiving side of said semiconductor substrate, wherein a p-n junction is formed between said emitter layer and said semiconductor substrate;
an anti-reflective coating formed on said emitter layer;
a first electrode connected to said emitter layer;
a second electrode formed on a back-lighted side of said semiconductor substrate; and
a second light conversion layer formed on said back-lighted side of said semiconductor substrate, wherein said second light conversion layer absorbs a first light with a first wavelength and emits a second light with a second wavelength, thereby performing a photoelectric converting operation.

### Claim 10 (depends on 9)

The solar cell according to claim 9 further comprising a back surface field layer, which is formed between and connected with said semiconductor substrate and said second electrode.

### Claim 11 (depends on 9)

The solar cell according to claim 9 further comprising an encapsulation layer, which is made of a transparent material.

### Claim 12 (depends on 11)

The solar cell according to claim 11 wherein said transparent material includes glass.

### Claim 13 (depends on 11)

The solar cell according to claim 11 wherein said encapsulation layer is formed on said second light conversion layer.

### Claim 14 (depends on 9)

The solar cell according to claim 9 wherein said second light conversion layer is made of an up-conversion phosphor.

### Claim 15

A bifacial solar cell comprising:
a semiconductor substrate;
an emitter layer formed on a first side of said semiconductor substrate, wherein a p-n junction is formed between said emitter layer and said semiconductor substrate;
an anti-reflective coating formed on said emitter layer;
a first electrode connected to said emitter layer;
a second electrode connected to said semiconductor substrate;
a first light conversion layer formed on said anti-reflective coating, wherein said first light conversion layer absorbs a first light with a first wavelength and emits a second light with a second wavelength, thereby performing a photoelectric converting operation; and
a second light conversion layer formed on a second side of said semiconductor substrate, wherein said second light conversion layer absorbs a third light with a third wavelength and emits a fourth light with a fourth wavelength, thereby performing another photoelectric converting operation.

### Claim 16 (depends on 15)

The bifacial solar cell according to claim 15 further comprising a back surface field layer, which is formed between and connected with said semiconductor substrate and said second electrode.

### Claim 17 (depends on 15)

The bifacial solar cell according to claim 15 further comprising an encapsulation layer, which is made of a transparent material.

### Claim 18 (depends on 17)

The bifacial solar cell according to claim 17 wherein said transparent material includes glass.

### Claim 19 (depends on 17)

The bifacial solar cell according to claim 17 wherein said encapsulation layer is formed on said first light conversion layer and said second light conversion layer.

### Claim 20 (depends on 15)

The bifacial solar cell according to claim 15 wherein said first light conversion layer and said second light conversion layer are made of down-conversion phosphors.