Ecole Polytechnique Federale De Lausanne

Université De Neuchâtel

Peter Cuony

Christophe Ballif

Matthieu Despeisse

Julien Bailat

Didier Domine

Gaetano Parascandolo

A multiple-junction photoelectric device includes sequentially, a substrate, a first conducting layer, at least two elementary photoelectric devices, at least one of the elementary photoelectric devices being made of microcrystalline silicon, and a second conducting layer. The first conducting layer has a surface facing the microcrystalline silicon elementary photoelectric device such that the surface:

Multiple-junction photoelectric device and its production process

A multiple-junction photoelectric device includes a substrate with a first conducting layer thereon, at least two elementary photoelectric devices of p-i-n or p-n configuration, with a second conducting layer thereon, and at least one intermediate layer between two adjacent elementary photoelectric devices. The intermediate layer has, on the incoming light side, opposite top and bottom faces, the top and bottom faces having respectively a surface morphology including inclined elementary surfaces so &#x3b1;is smaller than &#x3b1;by at least 3&#xb0;, preferably 6&#xb0;, more preferably 10&#xb0;, and even more preferably 15&#xb0;; where &#x3b1;is the angle for which 90% of the elementary surfaces of the top face of the intermediate layer have an inclination equal to or less than this angle, and &#x3b1;is the angle for which 90% of the elementary surfaces of the bottom face of the intermediate layer have an inclination equal to or less than this angle.

Multiple-junction photoelectric device

Growing community of inventors

Neuchatel, Switzerland

Peter Cuony