Université De Neuchâtel

Ecole Polytechnique Féderale De Lausanne (epfl)

Franz-Joseph Haug

Christophe Ballif

Philipp Löper

Thomas Soderstrom

Xavier Niquille

Philippe Wyss

Josua STÜCKELBERGER

Thomas Söderström

A multiple-junction photoelectric device includes a substrate on which a first conducting layer is deposited, at least two elementary photoelectric devices of n-i-p or n-p configuration, on which a second conducting layer is deposited, and at least one intermediate layer between two adjacent elementary photoelectric devices. The intermediate layer has, on the incoming light side, top and bottom faces, the latter having a peak-valley roughness &#x3e;150 nm, the top and bottom faces having respectively a surface morphology including inclined elementary surfaces so &#x3b1;&#x3c;&#x3b1;by at least 3; where &#x3b1;is the angle for which 90% of the elementary surfaces of the top face of the intermediate layer have an inclination &#x2266;this angle, and &#x3b1;is the angle for which 90% of the elementary surfaces of the surface of the bottom face of the intermediate layer have an inclination &#x2266;this angle.

Multiple-junction photoelectric device and its production process

Growing community of inventors

Saint-Blaise, Switzerland

Franz-Joseph Haug