Modulation of Majority Charge Carrier from Hole to Electron by Incorporation of Cyano Groups in Diketopyrrolopyrrole-Based Polymers
摘要:
A thienylene-vinylene-thienylene (TVT) derivative with cyano groups in the 3- and 3'-positions was synthesized as a building block of semiconducting polymers for high mobility organic field effect transistors (OFETs). (E)-1,2-Di-(3-cyanothiophen-2-yl)ethene (2CNTVT) was copolymerized with diketopyrrolopyrrole (DPP) units via Stile coupling reaction to give 2DPP-2CNTVT and 7DPP-2CNTVT. The properties of these two polymers were compared with those of the corresponding polymers without cyano groups in TVT (2DPP-TVT and 7DPP-TVT). The effects of CN groups and branched alkyl position were found to have a significant influence on the optical, electrochemical, morphological, and charge transporting properties of the polymers. The average hole mobilities of OFETs. fabricated with 2DPP-TVT and 7DPP-TVT OFETs were 1.63 and 2.2 cm(2) V-1 s(-1), respectively, and the average electron mobility for both 2DPP-2CNTVT and 7DPP-2CNTVT OFETs was 1.2 cm(2) V-1 s(-1).
Thiophene-Fused Borepins As Directly Functionalizable Boron-Containing π-Electron Systems
作者:David R. Levine、Maxime A. Siegler、John D. Tovar
DOI:10.1021/ja502644e
日期:2014.5.14
preparation of two isomeric dithienoborepins (DTBs), boron-containing polycyclic aromatics featuring the fusion of borepin and thiophene rings. DTBs exhibit reversible cathodic electrochemistry and boron-centered Lewis acidity in addition to enhanced electronic delocalization relative to benzo-fused analogues. Boron's precise position within the conjugation pathway of DTBs significantly affected electronic
A new strategy to synthesize 4,9- and 5,10-dialkylated α-aNDTs as well as 4,9- and 5,10-dialkylated β-aNDTs is described. Fourisomeric precursors with different dithienyl-ene-diyne arrangements undergo base-induced double 6π-cyclization to construct the central naphthalene cores, leading to the formation of the regiospecific products. These 2,7-distannylated dialkylated aNDT-based monomers can be
Angular-Shaped 4,9-Dialkyl α- and β-Naphthodithiophene-Based Donor-Acceptor Copolymers: Investigation of Isomeric Structural Effects on Molecular Properties and Performance of Field-Effect Transistors and Photovoltaics
9‐didodecyl α‐aNDT and 4,9‐didodecyl β‐aNDT isomeric structures have been regiospecifically designed and synthesized. The distannylated α‐aNDT and β‐aNDT monomers are copolymerized with the Br‐DTNT monomer by the Stille coupling to furnish two isomericcopolymers, PαNDTDTNT and PβNDTDTNT, respectively. The geometric shape and coplanarity of the isomeric α‐aNDT and β‐aNDT segments in the polymers play
申请人:Pusan National University Industry-University Cooperation Foundation 부산대학교 산학협력단(220040044843) BRN ▼621-82-06530
公开号:KR101822888B1
公开(公告)日:2018-01-29
본 발명은 3번 위치에 사이아노 치환기가 도입된 티오펜비닐렌 단량체를 포함하는 유기박막트랜지스터의 유기반도체 화합물, 이의 제조방법 및 이를 함유하는 유기전자소자에 관한 것으로, 본 발명의 유기반도체 화합물은 낮은 LUMO 에너지 준위, 열적안정성 및 용해도가 높아 이를 함유하는 유기 전자 소자, 특히 유기 박막 트랜지스터 소자에서 우수한 n형 전자 전달 특성을 나타낸다.