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- W2178155794 abstract "For solution‐based small‐molecule organic photovoltaic cells (SM BHJ), thermal annealing is often regarded as a very vital processing to yield high‐efficiency devices. Here, the device with the photoactive p‐DTS(FBTTh 2 ) 2 :PC 60 BM blends has been studied by varying the annealing temperature. The highest power conversion efficiency (PCE), fill factor (FF), and short‐circuit current ( J sc ) has been achieved after the device was annealed at the temperature of 80 °C. X‐ray diffraction (XRD) displayed that the p‐DTS(FBTTh 2 ) 2 tends to form big islands with well‐defined crystalline structure (long coherence length) surrounded by small islands of the PC 60 BM after annealing, and reached the largest grain size of 27 nm after annealing at 80 °C. AFM images demonstrated the most sufficient phase separation within the photoactive blend layer after annealing at 80 °C, which provides good photogenerated excitons dissociation. Such improvements have proved beneficial to decrease the ohmic loss and recombination in carrier‐transport process via measuring series resistance and shunt resistance as well as hole mobility. This work opens up a new way to understand the relationship between thermal annealing and molecular interaction from the viewpoint of lattice relaxation." @default.
- W2178155794 created "2016-06-24" @default.
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- W2178155794 date "2015-11-17" @default.
- W2178155794 modified "2023-10-14" @default.
- W2178155794 title "Thermal-annealing dependence of crystallization on solution-processed small-molecule organic photovoltaics" @default.
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- W2178155794 doi "https://doi.org/10.1002/pssa.201532617" @default.
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