Probing film solidification dynamics in polymer photovoltaics |
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| Affiliation: | 1. School of Chemistry and Biochemistry, School of Materials Science and Engineering, Center for Organic Photonics and Electronics (COPE), Georgia Institute of Technology, Atlanta, GA 30332-0400, USA;2. School of Chemical and Biomolecular Engineering, School of Chemistry and Biochemistry, School of Materials Science and Engineering, Brook Byers Professor of Sustainability, Georgia Institute of Technology, Atlanta, GA 30332-0100, USA;1. Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan;2. Synchrotron Light Application Center, Saga University, Honjo 1, Saga 840-8502, Japan;1. Department of Mechatronic Technology, National Taiwan Normal University, Taipei 106, Taiwan;2. Institute of Microelectronics, Chinese Academy of Sciences, Beijing 10029, China;1. Analysis Science Group, Samsung Advanced Institute of Technology, Gyeonggi-do 443-803, Republic of Korea;2. Computational Analysis Engineering Group, Samsung SDI, Gyeonggi-do 443-803, Republic of Korea |
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| Abstract: | 
Semiconducting conjugated polymers have drawn a great deal of attention over the past decade due to their solution processability and potential use in roll to roll fabrication of organic solar cells. Here, we report the effect of solvent vapor pressure on poly(3-hexylthiophene):[6,6]-phenyl C61-butyric acid methyl ester (P3HT:PCBM) blade coated inverted solar cells using ZnO as the electron transporting layer and MoO3 as the hole transporting layer. The resultant morphology and device performance are investigated for devices processed from solvents with varied vapor pressure and a mixed solvent. We report that the use of a mixed solvent system is advantageous for controlling the initial vapor pressure of the processing solution, thereby controlling the phase separated morphology between P3HT and PCBM which impacts ultimate solar cell performance. |
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| Keywords: | Blade coating Inverted solar cell Organic photovoltaics P3HT PCBM |
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