1. Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg 41296, Sweden
2. Laboratory of Organic Electronics, Linköping University, Norrköping 60174, Sweden
3. Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
4. Department of Chemical Engineering, University of California, Santa Barbara, California 93106, USA
5. Materials Department, University of California, Santa Barbara, California 93106, USA
6. Wallenberg Wood Science Center, Linköping University, Norrköping 60174, Sweden
7. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
8. Wallenberg Wood Science Center, Chalmers University of Technology, Göteborg 41296, Sweden