Imec Vzw

Imec

Katholieke Universiteit Leuven

Katholieke Universiteit Leuven, K.u. Leuven Research & Development

Filip Duerinckx

Jef Poortmans

Maria Jesus Recaman Payo

Yuandong Li

Kris Van Nieuwenhuysen

Monica Aleman

The disclosed technology generally relates to silicon solar cells and more particularly to a doped layer formed on a textured surface of a silicon solar cell, and methods of fabricating the same. In one aspect, a method of creating a doped layer at a rear side of a crystalline silicon bifacial solar cell is disclosed. The method can include texturing at least a rear side of a silicon substrate of the solar cell to create a pattern of pyramids, thereby creating a pyramidal topology of the rear side. The method can also include forming a doped layer at the rear side by, using epitaxial growth, growing at least one doped silicon epitaxial layer on the pyramids. Simultaneously with forming the doped layer and by using facet evolution, the pyramidal topology of the rear side can be smoothed by the growth of the at least one epitaxial layer. The epitaxial growth can be continued until, on upper parts of a majority of the pyramids, an angle between a surface of the at least one epitaxial layer and the substrate is between 5 to 35&#xb0;. A crystalline silicon bifacial solar cell is also disclosed.

Smoothed doped layer for solar cell

A method for forming an emitter structure on a substrate and emitter structures resulting therefrom is disclosed. In one aspect, a method includes forming, on the substrate, a first layer comprising semiconductor material. The method also includes texturing a surface of the first layer, thereby forming a first emitter region from the first layer, wherein the first emitter region has a first textured surface. The method also includes forming a second emitter region at the first textured surface, the second emitter region having a second textured surface.

Method for producing an emitter structure and emitter structures resulting therefrom

Growing community of inventors

Kessel-lo, Belgium

Filip Duerinckx