Yang, Hee Yeon Park, Han-Wool Kim, Soo Jin Hong, Jae-Min Kim, Tae Whan Kimc, Do Hwan Lim, Jung Ah 2024-01-20T05:01:07Z 2024-01-20T05:01:07Z 2021-09-04 2016-02-14 1463-9076 https://pubs.kist.re.kr/handle/201004/124384 Here we demonstrated the split-second crystallization of a liquid-crystalline conjugated polymer semiconductor induced by irradiation with intense pulsed white light (IPWL) for the efficient improvement of electrical properties of flexible thin film transistors. A few seconds of IPWL irradiation of poly(didodecylquaterthiophene-alt-didodecylbithiazole) (PQTBTz-C12) thin films generated heat energy through the photo-thermal effect, leading to the crystallization of PQTBTz-C12 and formation of nodule-like nanostructures. The IPWL-induced crystallization of PQTBTz-C12 resulted in a threefold improvement in the field-effect mobility of thin film transistors compared to as-prepared devices. The conformational change of the PQTBTz-C12 chains was found to be strongly related to the irradiation fluence. As a proof-of-concept, the IPWL treatment was successfully applied to the PQTBTz-C12 layer in flexible transistors based on plastic substrates. The performance of these flexible devices was significantly improved after only 0.6 s of IPWL treatment, without deformation of the plastic substrate. English ROYAL SOC CHEMISTRY FIELD-EFFECT TRANSISTORS SOLAR-CELLS OXIDE COPOLYMERS DEPOSITION SUBSTRATE INK Intense pulsed light induced crystallization of a liquid-crystalline polymer semiconductor for efficient production of flexible thin-film transistors Article 10.1039/c5cp06989k 1 PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v.18, no.6, pp.4627 - 4634 PHYSICAL CHEMISTRY CHEMICAL PHYSICS 18 6 4627 4634 scie scopus 000369509100043 2-s2.0-84957536240 Chemistry, Physical Physics, Atomic, Molecular & Chemical Chemistry Physics Article FIELD-EFFECT TRANSISTORS SOLAR-CELLS OXIDE COPOLYMERS DEPOSITION SUBSTRATE INK intensely pulsed white light liquid crystalline polymer semiconductor organic thin-film transistors flexible substrate