Novel 4,8-benzobisthiazole copolymers and their field-effect transistor and photovoltaic applications
Novel 4,8-benzobisthiazole copolymers and their field-effect transistor and photovoltaic applications
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DOI：
10.1039/c7tc03959j
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发表时间：
2017-12-07
影响因子：
6.4
通讯作者：
Skabara, Peter J.
中科院分区：
文献类型：
--
作者：
Conboy, Gary;Taylor, Rupert G. D.;Skabara, Peter J.
以二噻吩基吡咯并吡咯二酮（DPP）、二噻吩并吡咯（DTP）、苯并噻二唑（BT）、苯并二噻吩（BDT）和4，40-二烷氧基二噻唑（BTz）为单体，设计合成了一系列含苯并[1，2-d：4，5-d ']二噻唑（BBT）结构单元的共聚物。所得聚合物具有共轭途径，其通过BBT单元的2，6-位与更常见的取代途径正交，促进相邻单体单元的战略性放置的杂原子之间的分子内非共价相互作用。这种相互作用使得能够通过改变它们的数量和强度来控制平面度，进而允许调整带隙。所得的4，8-BBT材料在p型有机场效应晶体管中给出了高达2.16 x 10（-2）cm（2）V-1 s（-1）的增强的迁移率，并且给出了高达4.45%的功率转换效率的良好的太阳能电池性能。
A series of copolymers containing the benzo[1,2-d: 4,5-d'] bis(thiazole) (BBT) unit has been designed and synthesised with bisthienyl-diketopyrrolopyrrole (DPP), dithienopyrrole (DTP), benzothiadiazole (BT), benzodithiophene (BDT) or 4,40-dialkoxybithiazole (BTz) comonomers. The resulting polymers possess a conjugation pathway that is orthogonal to the more usual substitution pathway through the 2,6-positions of the BBT unit, facilitating intramolecular non-covalent interactions between strategically placed heteroatoms of neighbouring monomer units. Such interactions enable a control over the degree of planarity through altering their number and strength, in turn allowing for tuning of the band gap. The resulting 4,8-BBT materials gave enhanced mobility in p-type organic field-effect transistors of up to 2.16 x 10(-2) cm(2) V-1 s(-1) for pDPP2ThBBT and good solar cell performance of up to 4.45% power conversion efficiency for pBT2ThBBT.