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. 2015 Sep 25;6:8394. doi: 10.1038/ncomms9394

Figure 4. Effect of coating speed and of molecular weight.

Figure 4

(a) Saturation mobility (VGS=VDS=60 V) for FETs fabricated by bar-coating at different velocity (1, 3 and 6 m min−1) a solution of P(NDI2OD-T2) with Mn of 26.6 KDa and PDI of 3.2, probing the transport parallel (black dots) and perpendicularly (red dots) to the coating direction. The solution concentration is 5 g l−1 in mesitylene. (b) Saturation mobility (VGS=VDS=60 V) for FETs fabricated by bar-coating solutions of P(NDI2OD-T2) with different Mn and PDI, probing the transport parallel (black dots) and perpendicularly (red dots) to the coating direction. Solution concentration (5 g l−1 in mesitylene) and coating speed (3 m min−1) were kept constant.