CHENG-LIANG LIU et al.SHIH-HUANG TUNG et al.2022-03-222022-03-2220212199160Xhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85119061537&doi=10.1002%2faelm.202100648&partnerID=40&md5=6f04ea911937a96eb5a1d4191feb65a1https://scholars.lib.ntu.edu.tw/handle/123456789/598341Two solution-processable organic semiconductors, DFPT-DTTR (1) and DFPbT-DTTR (2), composed of pentafluorophenyl (FP) end-capped 3,5-dialkyl dithienothiophene (DTTR) core with thiophene (T) or bithiophene (bT) as π-bridged spacers are developed and investigated for their optical, electrochemical, microstructural, and electrical properties. With more conjugated bithiophene units, compound 2 exhibits a red-shifted UV–vis absorption band and upshifted HOMO/downshifted LUMO energy levels. According to the density functional theory, compound 2 features a more twisted molecular structure due to the intrinsic non-coplanar blocks in the π-backbones. Compound 1-based organic field effect transistors exhibit efficient hole transport with mobility up to 0.48?cm2 V?1 s?1. This is one of the high mobility organic semiconductors exhibiting p-channel characteristics based on solution-processable small molecular FP end-capped fused/oligothiophenes. With large and interconnected crystalline morphologies, decreased π–π stacking distance, and less steric hindrance, compound 1 exhibits two orders of magnitude higher mobility than the more distorted 2, which exhibits lower hole mobility of 1.82 × 10?3 cm2 V?1 s?1. ? 2021 Wiley-VCH GmbHdithienothiopheneorganic semiconductorsorganic transistorperfluorophenylsolution-processingDensity functional theoryHole mobilityRed ShiftBithiophenesDFPTDithienothiopheneHigh mobilityHole transportingOrganic field-effect transistorsOrganic transistorPerfluorophenylSolution processableSolution-processingOrganic field effect transistors[SDGs]SDG7journal article10.1002/aelm.2021006482-s2.0-85119061537