Title of article :
Modified processing conditions for optimized organic solar cells with inkjet printed P3HT:PC61BM active layers
Author/Authors :
Lange، نويسنده , , Alexander and Hollaender، نويسنده , , Andreas and Wegener، نويسنده , , Michael، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
Abstract :
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).
Keywords :
Post-annealing , inkjet printing , Organic solar cells , Active layer drying , Solvent annealing
Journal title :
MATERIALS SCIENCE & ENGINEERING: B
Journal title :
MATERIALS SCIENCE & ENGINEERING: B