1. Univ. Grenoble Alpes, F-38000 Grenoble, France
2. CEA, LITEN, Department of Nanomaterials, MINATEC, 17 rue des martyrs, F-38054 Grenoble Cedex 09, France
3. Univ. Grenoble Alpes, INES, F-73375 Le Bourget du Lac, France
4. CEA, LITEN, Department of Solar Technologies, F-73375 Le Bourget du Lac, France