1. Department of ChemistryInorganic ChemistryUniversity of Cologne50939CologneGermany
2. École de technologie supérieure (ÉTS) Department of Electrical Engineering1100 rue Notre‐Dame Ouest Montréal (QC)H3C 1K3Canada
3. Faculty of Engineering and Natural SciencesTampere UniversityP.O. Box 692, FI–33014 TampereFinland
4. IEK5‐PhotovoltaicsForschungszentrum Jülich52425JülichGermany
5. Centre ÉnergieMatériaux et TélécommunicationsINRS1650 Boulevard Lionel BouletVarennesQCJ3 × 1S2Canada