1. Polymer Competence Center Leoben GmbH (PCCL),Leoben,Austria,8700
2. Envision Digital,Redwood City,CA,USA,94065
3. Institut für Solarenergieforschung,Emmerthal,Germany,31860
4. University of Ljubljana,Laboratory of Photovoltaics and Optoelectronics, Faculty of Electrical Engineering,Ljubljana,Slovenia,1000