Study on structure-property relationship of isoindigo and thienoisoindigo : synthesis, characterization and application for organic field-effect transistors

Isoindigo;Thienoisoindigo;Small molecule;D-A polymer;Structure-Property Relationship;Organic Field-Effect Transistor;620

공과대학 재료공학부 ;

University:서울대학교 대학원

关键词: Isoindigo;    Thienoisoindigo;    Small molecule;    D-A polymer;    Structure-Property Relationship;    Organic Field-Effect Transistor;    620;   

Others  :  http://s-space.snu.ac.kr/bitstream/10371/123335/1/000000024812.pdf

美国|英语

来源: Seoul National University Open Repository

【 摘 要 】

maxima electron mobility were 1.70×10-3 cm2V-1s-1 and 1.83×10-2 cm2V-1s-1, respectively. On the other hand, novel class of D-A type polymers were designed and synthesized using IID and TIID as an effective acceptor(A) unit.From UV/VIS and CV data, D-A polymers were shown to have low bandgap energy and appropriate frontier MO levels for OFET application. DFT calculation suggested that TIID-based D-A polymer would have much more planar structure through polymer backbone compared to that in IID-based polymer. Solution-processed OFET devices were fabricated using 0.3wt% chloroform solution for each polymer. Both polymers were shown to have ambipolar charge transport ability. While IID-based D-A copolymer showedmaxima mobilities of μe =3.09×10-4cm-1V-1s-1 and μh =3.04×10-2cm-1V-1s-1, TIID-based D-A copolymershowed more balanced ambipolar performances with maximum mobility of μe =4.44×10-3cm-1V-1s-1 and μh =1.14×10-2cm-1V-1s-1.