Please use this identifier to cite or link to this item: https://doi.org/10.1063/1.3001574
Title: Solvent effects and multiple aggregate states in high-mobility organic field-effect transistors based on poly(bithiophene-alt-thienothiophene)
Authors: 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. 
Issue Date: 2008
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
URI: http://scholarbank.nus.edu.sg/handle/10635/53179
ISSN: 00036951
DOI: 10.1063/1.3001574
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