TiO2 nanoparticles with different shapes and surface modifiers can change the hole mobility of a P3HT matrix in TiO2/P3HT composite films by three orders of magnitude. The composite films with TiO2 nanorods modified with pyridine show hole mobilities 2–3 times higher than that of a pristine P3HT film and the mobilities can reach as high as 0.23 cm2 V−1s−1.
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