Abstract
The electronic and charge-transport properties of three organic semiconductor materials were theoretically investigated using density functional (DFT) theory based on the Marcus–Hush theory. The functionalization of 7,7,8,8-Tetracyanoquinodimethane, 1,4,5,8-Naphthalenetetracarboxylic dianhydride, and Perylene-3,4,9,10-tetracarboxylic dianhydride by electron donating groups (R = CH3, OCH3, and OH) increases the reorganization energies for hole and electron transfer (λ+ and λ−) due to additional contributions from the C–R bonds. Simultaneously, the electron affinity and ionization potential are reduced, except for the electron affinity of 4OH-TCNQ. The HOMO–LUMO energy gaps are also studied. Species with lower HOMO–LUMO gap are predicted to have higher carrier mobility and lower kinetic stability.
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Oshi, R., Abdalla, S. & Springborg, M. The impact of functionalization of organic semiconductors by electron donating groups on the reorganization energy. Eur. Phys. J. D 73, 124 (2019). https://doi.org/10.1140/epjd/e2019-100020-1
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DOI: https://doi.org/10.1140/epjd/e2019-100020-1