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|Title:||Solvent effects and multiple aggregate states in high-mobility organic field-effect transistors based on poly(bithiophene-alt-thienothiophene)|
|Authors:||Wang, S. |
|Source:||Wang, S., Tang, J.-C., Zhao, L.-H., Png, R.-Q., Wong, L.-Y., Chia, P.-J., Chan, H.S.O., Ho, P.K.-H., Chua, L.-L. (2008). Solvent effects and multiple aggregate states in high-mobility organic field-effect transistors based on poly(bithiophene-alt-thienothiophene). Applied Physics Letters 93 (16) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.3001574|
|Abstract:||Franck-Condon absorption analysis reveals the existence of several aggregate states in poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b] thiophene) (PBTTT) thin films which impact their recrystallization and the attainable field-effect mobility (μFET). Poor solvents (toluene and mixed-xylenes) lock in both disordered and well-ordered states that cannot be annealed away even in the liquid crystalline phase. This reduces μFET and increases mobility activation energies compared with films from good solvents (chlorobenzene and o -dichlorobenzene). Despite its poor solubility characteristics, PBTTT can be ink-jet printed in dilute chlorobenzene, and devices can be operated unencapsulated in ambient, in the dark (105 cycles over several days) with only a moderate mobility loss. © 2008 American Institute of Physics.|
|Source Title:||Applied Physics Letters|
|Appears in Collections:||Staff Publications|
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