کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1529016 | 995730 | 2013 | 7 صفحه PDF | دانلود رایگان |
Inkjet printing can be used to deposit the functional layers of organic solar cells and it offers advantages over spin coating such as the possibility to print films with user-defined patterns. In this study, inkjet printing was utilized to deposit polymer:fullerene solar cell active layers and different drying and annealing conditions were examined in order to optimize device performance. Low fill factors of approximately 30% were found for devices with printed active layers that were dried at 100 °C and a considerable shift in the fill factor of up to 60% was seen after post-annealing at 150 °C. Changes in the fill factor corresponded to an increase in device efficiency from ∼1.3% to ∼2.4% after post-annealing. An alternative active layer drying procedure was used based on solvent annealing which resulted in high fill factors of 60% and efficiencies of ∼2.4% without post-annealing. Blend films were examined with atomic force microscopy, ultra-violet visible spectroscopy and X-ray photoelectron spectroscopy. It was determined that solvent annealed, inkjet printed active layers are considerably rougher and show enhanced organization with respect to films that were dried at 100 °C. Two preparation routes are provided for devices with printed active layers with acceptable efficiencies based on quick drying and post-annealing or slow drying (solvent annealing).
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► Inkjet printing was used to deposit P3HT:PC61BM solar cell active layers.
► The fill factor was dependent on the drying conditions used after printing.
► Fast drying at 100 °C and post-annealing resulted in good device performance.
► Devices with active layers which were slowly dried had high efficiencies without post-annealing.
Journal: Materials Science and Engineering: B - Volume 178, Issue 5, 20 March 2013, Pages 299–305