Index Catalog // ScholarsArchive@OSU

Creator:: Rajesh, Kallarakkal Ramakrishnan, Paudel, Keshab, Johnson, Brian, Hallani, Rawad, Anthony, John, and Ostroverkhova, Oksana
Abstract:: We explored relationships between photophysical processes and solar cell characteristics in solution-processable bulk heterojunctions (BHJs), in particular: (1) polymer donor:fullerene acceptor:small-molecule (SM) nonfullerene acceptor, (2) polymer donor:SM donor:SM nonfullerene acceptor, and (3) SM donor:SM nonfullerene or fullerene acceptor. Addition of a nonfullerene SM acceptor to “efficient” polymer:fullerene BHJs led to...
Resource Type:: Article

Creator:: Paudel, Keshab, Johnson, Brian, Thieme, Mattson, Haley, Michael M., Payne, Marcia M., Anthony, John E., and Ostroverkhova, Oksana
Abstract:: We examined sub-nanosecond time-scale charge carrier dynamics in crystalline films of a functionalized anthradithiophene (ADT) donor (D) with three different acceptor (A) molecules. A four-fold enhancement in ultrafast charge carrier separation efficiency was observed in D/A blends with a fullerene acceptor added at 7–10 wt. % concentrations, whereas a gradual...
Resource Type:: Article

Creator:: Johnson, Brian, Kendrick, Mark J., and Ostroverkhova, Oksana
Abstract:: We present a model that describes nanosecond (ns) time-scale photocurrent dynamics in functionalized anthradithiophene (ADT) films and ADT-based donor-acceptor (D/A) composites. By fitting numerically simulated photocurrents to experimental data, we quantify contributions of multiple pathways of charge carrier photogeneration to the photocurrent, as well as extract parameters that characterize charge...
Resource Type:: Article

Creator:: Purushothaman, Balaji, Parkin, Sean R., Kendrick, Mark J., David, Daniel, Ward, Jeremy W., Yu, Liyang, Stingelin, Natalie, Jurchescu, Oana D., Ostroverkhova, Oksana, and Anthony, John E.
Abstract:: Acenes larger than pentacene are predicted to possess enticing electronic properties, but are insoluble and prone to rapid decomposition. Utilizing a combination of functionalization strategies, we present stable, solution processable hexacenes and an evaluation of their hole and electron transport properties.
Resource Type:: Article

Creator:: Day, Jonathan, Platt, Andrew D., Ostroverkhova, Oksana, Subramanian, Sankar, and Anthony, John E.
Abstract:: We report on the effect of various guest molecules added to a functionalized anthradithiophene (ADT) host on photoexcited charge carrier dynamics in solution-deposited thin films, from ~100 ps to >100 μs after photoexcitation with 100 fs laser pulses. An addition of 2 and 5 wt % of C60 to a...
Resource Type:: Article

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