Abstract
We systematically studied the influence of solvent vapor annealing on the molecular ordering, morphologies, and charge transport properties of poly(3-hexylthiophene) (P3HT) thin films embedded with preformed crystalline P3HT nanowires (NWs). Solvent vapor annealing (SVA) with chloroform (CF) was found to profoundly impact on the structural and morphological changes, and thus on the charge transport characteristics, of the P3HT-NW-embedded P3HT films. With increased annealing time, the density of crystalline P3HT NWs was increased within the resultant films, and also intra- and intermolecular interactions of the corresponding films were significantly improved. As a result, the P3HT-NW-embedded P3HT films annealed with CF vapor for 20 min resulted in a maximized charge carrier mobility of ~0.102 cm2 V−1 s−1, which is higher than that of pristine P3HT films by 4.4-fold (μ = ~0.023 cm2 V−1 s−1).
Highlights
In recent years, solution-processible conjugated polymers have garnered a great deal of attention for the practical printing of organic field-effect transistors (OFETs), organic photovoltaics, and interface materials due to their low cost and large-area processability [1,2,3,4,5,6]
We investigated the effects of Solvent vapor annealing (SVA) on the molecular ordering, morphology, In conclusion, we investigated the effects of SVA on the molecular ordering, morphology, and and charge transport properties of the P3HT films containing preformed P3HT NWs
SVA using CF vapor vapor greatly facilitated the formation of crystalline P3HT nanofibrillar structures via strong π–π greatly facilitated the formation of crystalline P3HT nanofibrillar structures via strong π–π interactions between P3HT chains
Summary
Solution-processible conjugated polymers have garnered a great deal of attention for the practical printing of organic field-effect transistors (OFETs), organic photovoltaics, and interface materials due to their low cost and large-area processability [1,2,3,4,5,6]. They have been utilized and studied as active materials for OFETs because of their semiconducting properties, arising from the extended π-conjugation of unhybridized Pz carbon orbitals along the backbone [7]. While this approach is quite effective, it leads to degradation of the favorable properties of the conjugated polymer itself and is somewhat limited in achieving a high degree of Polymers 2020, 12, 1188; doi:10.3390/polym12051188 www.mdpi.com/journal/polymers
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
