乙二醇
侧链
溶剂
水溶液
结晶度
PEG比率
分子
化学
酒
溶解度
材料科学
乙醇
堆积
有机化学
高分子化学
结晶学
聚合物
财务
经济
作者
Seung Hwa Hong,Dong Won Kim,Soo Young Park
标识
DOI:10.1016/j.dyepig.2023.111093
摘要
We address an eco-friendly aqueous process approach to obtain efficient/stable small molecule organic field effect transistors (OFETs). Penta-ethylene glycol (PEG) side chains were introduced at N-positions of the rigid backbone structures of indolo[3,2-b]indole(IDID), thus enabling the formation of PEG-IDIDF. The PEG-IDIDF exhibited remarkable solubility in alcohol (ethanol) solvent. The X-ray diffraction and grazing incidence wide angle X-ray scattering measurements indicate that the suitable addition of a typical cosolvent, water, to ethanol solvent significantly contributes to an enhancement in film crystallinity and molecular stacking orientation features than those of the PEG-IDIDF film processed by using a single solvent. Consequently, the PEG-IDIDF OFETs processed by the ethanol water cosolvent (90:10) ratio yielded the enhanced hole mobility of 4.07 × 10−3 cm2 V−1 s−1 and current on/off ratio of 106, which was one of the highest reliable mobility for small molecules OFETs processed with an alcohol solvent.
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