Université De Neuchâtel

Tel Solar Ag

Julien Bailat

Ulrich Kroll

Christophe Ballif

Didier Domine

Johannes Meier

Daniel Borrello

Evelyne Vallat-Sauvain

Stefano Benagli

Peter Cuony

Castens Lucie

Giovanni Monteduro

Miguel Marmelo

Jochen Hoetzel

Yassine Djeridane

Jerome Steinhauser

Jean-Baptiste Orhan

A method for manufacturing a micromorph tandem cell is disclosed. The micromorph tandem cell comprises a &#x3bc;c-Si:H bottom cell and an a-Si:H top cell, an LPCVD ZnO front contact layer and a ZnO back contact in combination with a white reflector. The method comprises the steps of The micromorph tandem cell can achieve a stabilized efficiency of 10.6%.

High efficiency micromorph tandem cells

The textured transparent conductive layer according to the invention is deposited on a substrate intended for a photoelectric device and exhibiting a surface morphology formed from a sequence of humps and hollows. It is characterized in that its hollows have a rounded base with a radius of more than 25 nm; the said hollows are virtually smooth, which is to say that, where they exhibit microroughnesses, these microroughnesses have a height on average of less than 5 nm; and its flanks form an angle with the plane of the substrate whose median of the absolute value is between 30&#xb0; and 75&#xb0;.

Textured transparent conductive layer and method of producing it

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

Glovelier, Switzerland

Julien Bailat