Lee, Seulyi Jeon, Hyeonyeol Jang, Mi Baek, Kyung-Youl Yang, Hoichang 2024-01-20T08:01:49Z 2024-01-20T08:01:49Z 2022-01-25 2015-01 1944-8244 https://pubs.kist.re.kr/handle/201004/125886 A highly pi-conjugated nanofibrillar network of poly(3-hexyl thiophene) (P3HT) embedded in polydimethylsiloxane (PDMS) elastomer films on SiO2 dielectrics was facilely developed via solution-blending of an ultrasound-assisted dilute P3HT solution with a PDMS precursor followed by spin-casting and curing. In contrast, simple blending without ultrasonication against the dilute P3HT solution yielded large agglomerates in cast films owing to a great difference in solubility parameter (delta) values (P3HT = 9.5 cal(1/2) cm(-3/2), PDMS = 7.3 cal(1/2) cm(-3/2)). In the ultrasound-assisted 0.1 vol % P3HT solutions, the pi-conjugated polymer could develop crystalline nanofibrils surrounded by nonpolar hexyl side chains with the same delta value as that of PDMS, yielding homogeneously dispersed 10 wt % loaded P3HT/PDMS blend films. Spun-cast P3HT/PDMS blend films could yield high electrical properties in organic field-effect transistor, including mobilities of up to 0.045 cm2 V-1 s(-1) and on/off current ratios of >5 x 10(5), as well as excellent environmental stability owing to the outer PDMS layer. English American Chemical Society Tunable Solubility Parameter of Poly(3-hexyl thiophene) with Hydrophobic Side-Chains to Achieve Rubbery Conjugated Films Article 10.1021/am507512m 1 ACS Applied Materials & Interfaces, v.7, no.2, pp.1290 - 1297 ACS Applied Materials & Interfaces 7 2 1290 1297 N scie scopus 000348332700031 2-s2.0-84921512283 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article FIELD-EFFECT MOBILITY THIN-FILMS HIGH-PERFORMANCE TRANSISTORS POLYMER MORPHOLOGY CRYSTALLIZATION SPECTROSCOPY INTERFACE CRYSTALS ultrasonification solubility parameter miscibility directed self-assembly poly(3-hexyl thiophene) organic field-effect transistor