1. Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia
2. National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 10213 Tallinn, Estonia
3. Department of Chemical and Biomolecular Engineering, University of California at Berkeley, Gilman Hall, Berkeley 94720, California, United States of America
4. Latvian State Institute of Wood Chemistry, Dzerbenes street 27, Riga LV-1006, Latvia
5. DLR Institute of Networked Energy Systems, Urban and Residential Technologies, Carl-von-Ossietzky-Str. 15, 26129 Oldenburg, Germany
6. State Research Institute Center for Physical Sciences and Technology, Savanoriu̧ ave. 231, LT-02300 Vilnius, Lithuania
7. Institute of Materials Science of Kaunas University of Technology, Barsausko str. 59, Kaunas LT-51423, Lithuania
8. Laboratory of Optoelectronic Materials Physics, Department of Materials and Environmental Technology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia