1. LumiLab Department of Solid State Sciences Ghent University Krijgslaan 281/S1 9000 Gent Belgium
2. PSL Research University Chimie ParisTech, IRCP, CNRS 75005 Paris France
3. LumiNova AG Speicherstrasse 60a CH‐9053 Teufen Switzerland
4. BREVALOR Impasse des Frenes 1 CH‐1669 Les Sciernes Switzerland
5. Département de Chimie Physique Université de Genève 30, quai E. Ansermet CH‐1211 Geneva 4 Switzerland