Poly field-effect mobility

Assadi, A. Svensson, C. Willander, M. Inganas, O. 1988. Field-effect mobility of poly(3-hexylthiophene). Appl. Phys. Lett. 53 195-197. 

Figure 14-21. Variation of the field-effect mobility as a function of the conductivity of variously doped poly(dodecyloxy-terthie-nyl) (PDOT), a polythiophene derivative (adapted from Ref. [113]).

In field-effect transistors based on the thin films of poly(3-alkyl)thiophene derivatives, high field-effect mobility has been observed because of the formation of crystal-like grains [116]. The mobility depends strongly upon the crystallinity of the thin films. Introduction of liquid crystallinity into conjugated polymers is expected to be effective for enhancing microscopic crystallization of conjugated polymers to increase their carrier mobilities. It can also cause anisotropy in various physical properties if macroscopic molecular alignment is achieved. 

Zhang, R. et al., Nanostructure dependence of field-effect mobility in regioregular poly(3-hexylthiophene) thin film field effect transistors, J. Am. Chem. Soc., 28,... 

A comparison of poly(3-alkylthiophene)s (P3ATs) with side chains ranging from butyl (35d) to dodecyl (35g) showed a non-monotonic dependence of field-effect mobility on alkyl chain length (Figure 3.1.13).[11,210] The average mobility varied... 

A variety of substituted parylene derivatives have been used as gate dielectrics for TFTs in a control study to investigate the effect of surface energy on channel characteristics and mobility [55]. It was found that the field effect mobility for an amorphous polymer semiconductor (MEH-PPV) increases with increasing surface hydrophobicity (a result that has been seen with amorphous poly(triarylamine)s [PTAAs] also) [5]. 

Kline, R.J., McGehee, M.D., Kadnikova, E.N. et al.. The dependence of regioregular poly(3-hexylthiophene) film morphology and field-effect mobility on molecular weight, Macromolecules 38, 3312, 2005. 

Yang, H.C. et ah. Effect of mesoscale crystalline structure on the field-effect mobility of regioregular poly(3-hexyl thiophene) in thin-fikn transistors, Adv. Func. Mater. 15, 671-676, 2005. 

Babel, A. and Jenekhe, S.A., Field-effect mobility of charge carriers in blends of regioregular poly(3-aIkylthiophene)s, J. Phys. Chem. B 107, 1749-1754, 2003. 

Assadi, A. et ah. Determination of field-effect mobility of poly(3-hexylthiophene) upon exposure to ammonia gas, Synth. Met., 37, 123, 1990. 

Kline et al. [86,87] studied the MW dependence of the field-effect mobility in regio-regular poly(3-hexylthiophene) synthesized by different routes and prepared using different coating techniques. They found that the mobility universally increased with MW, while the degree of crystallinity as determined by X-ray diffraction considerably decreased. This... 

Zhang, R., B. Li, M.C. lovu, M. Jeffries-El, G. Sauve, J. Cooper, S. Jia, S. Tristram-Nagle, D.M. Smilgies, D.N. Lambeth, R.D. McCullough, and T. Kowalewsld. 2006. Nanostructure dependence of field-effect mobility in regioregular poly(3-hexylthiophene) thin film field effect transistors. J Am Chem Soc 128 (11) 3480-3481. 

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