US 2014/0174516 A1 · SOLAR CELL AND MANUFACTURING METHOD THEREOF

Abstract

A solar cell includes a crystalline photovoltaic layer, a first impurity region having a first conductivity type and a second impurity region having a second conductivity type in the photovoltaic layer, a third impurity region having the first conductivity type in the first impurity region, a fourth impurity region having the second conductivity type in the second impurity region, a first barrier layer and a second barrier layer contacting the third impurity region and the fourth impurity region, respectively, and a first electrode and a second electrode contacting the first barrier layer and the second barrier layer, respectively. The first impurity region and the second impurity region are spaced apart from each other. The third impurity region and the fourth impurity region have an impurity concentration higher than the first impurity region the second impurity region, respectively.

Claims11

Dependent claims

A solar cell comprising:

a photovoltaic layer including a crystalline photovoltaic material;
a first impurity region in the photovoltaic layer, the first impurity region being a first conductivity type;
a second impurity region in the photovoltaic layer, the second impurity region spaced apart from the first impurity region and being a second conductivity type;
a third impurity region in the first impurity region, the third impurity region having the first conductivity type and an impurity concentration higher than the first impurity region;
a fourth impurity region in the second impurity region, the fourth impurity region having the second conductivity type and an impurity concentration higher than the second impurity region;
a first barrier layer contacting the third impurity region;
a second barrier layer contacting the fourth impurity region;
a first electrode contacting the first barrier layer;
and
a second electrode contacting the second barrier layer.

7 more elements

A method of manufacturing a solar cell, the method comprising:

forming a first impurity region in a photovoltaic layer, the first impurity region including a first impurity of a first conductivity type and the photovoltaic layer including a crystalline photovoltaic material;
forming a second impurity region in the photovoltaic layer, the second impurity region including a second impurity of a second conductivity type and spaced apart from the first impurity region;
introducing a third impurity having the first conductivity type in the first impurity region, the third impurity having an impurity concentration higher than an impurity concentration of the first impurity region;
introducing a fourth impurity having the second conductivity type in the second impurity region, the fourth impurity having an impurity concentration higher than an impurity concentration of the second impurity region;
forming a first electrode on a first portion of the photovoltaic layer, the first portion including the third impurity;
forming a second electrode on a second portion of the photovoltaic layer, the second portion including the fourth impurity;
and
heat treating the photovoltaic layer to activate the third impurity and the fourth impurity to form a third impurity region and a fourth impurity region.

5 more elements

Dependencies are inferred from the claim text.

Solar cell and manufacturing method thereof

Life of this patent

Solar cell and manufacturing method thereof

Life of this patent

Abstract

Claims11