| Autor: |
Pace, Giuseppina, Bargigia, Ilaria, Noh, Yong-Young, Silva, Carlos, Caironi, Mario |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Nat Commun 10, 5226 (2019) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1038/s41467-019-13155-9 |
| Popis: |
It is still a matter of controversy whether the relative difference in hole and electron transport in solution-processed organic semiconductors is either due to intrinsic properties linked to chemical and solid-state structure or to extrinsic factors, as device architecture. We here isolate the intrinsic factors affecting either electron or hole transport within the same film microstructure of a model copolymer semiconductor. Relatively, holes predominantly bleach inter-chain interactions with H-type electronic coupling character, while electrons' relaxation more strongly involves intra-chain interactions with J-type character. Holes and electrons mobility correlates with the presence of a charge transfer state, while their ratio is a function of the relative content of intra- and inter-molecular interactions. Such fundamental observation, revealing the specific role of the ground-state intra- and inter-molecular coupling in selectively assisting charge transport, allows predicting a more favorable hole or electron transport already from screening the polymer film ground state optical properties. |
| Databáze: |
arXiv |
| Externí odkaz: |
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