Synergistic Use of Bithiazole and Pyridinyl Substitution for Effective Electron Transport Polymer Materials
Synergistic Use of Bithiazole and Pyridinyl Substitution for Effective Electron Transport Polymer Materials
复制标题
DOI：
10.1021/acs.chemmater.9b00208
复制
发表时间：
2019-06-11
影响因子：
8.6
通讯作者：
Reichmanis, Elsa
中科院分区：
文献类型：
--
作者：
Buckley, Carolyn;Thomas, Simil;Reichmanis, Elsa
用于有机场效应晶体管（ofet）的半导体共轭聚合物的开发一直是激烈研究工作的焦点，因为它们在塑料电子中的关键作用，以及溶液可加工性的愿景，导致相对于无机对应物的器件制造成本降低。高性能n沟道（电子输运）聚合物半导体对于发展坚固和低成本的有机集成电路至关重要，但它面临着巨大的挑战，主要是环境工作稳定性差和OFET器件性能远远落后于p沟道有机半导体。作为普遍存在的供体受体分子设计策略的替代方案，采用全受体（A-A）单极方法设计聚(2-（2-癸基十四烷基）-6-（5-（5'-甲基[2,2'-双硫醇]-5-基）-3-（5-甲基吡啶-2-基）-5-（三聚糖-11-基）-2,5-二氢吡咯[3,4-c]吡咯-1,4-二酮）（PDBPyBTz）。n通道共聚物允许研究吸电子部分对共轭聚合物器件性能的影响以及A - A分子设计策略的实用性。作为苯的类似物，PDBPyBTz中双酮吡咯基吡咯部分两侧的吡啶被策略性地选择以降低能级并赋予单体平面化，这两者都有助于实现稳定的n通道性能。将PDBPyBTz集成到底栅/底接触OFET中，可以获得单极电子输运的器件。除了开发高性能n通道聚合物外，该研究还允许对结构-性能关系进行调查，这对可持续技术高需求的材料设计至关重要，包括有机光伏和其他溶液处理的有机电子器件。
The development of semiconducting conjugated polymers for organic field effect transistors (OFETs) has been the focus of intense research efforts for their key role in plastic electronics as well as a vision of solution processability leading to reduced costs in device fabrication relative to those of their inorganic counterparts. The pursuit of high-performance n-channel (electron-transporting) polymer semiconductors vital to the development of robust and low-cost organic integrated circuits has faced significant challenges, mainly for poor ambient operational stability and OFET device performance lagging far behind that of p-channel organic semiconductors. As an alternative to the ubiquitous donor acceptor molecular design strategy, an all-acceptor (A-A) unipolar approach was implemented in the design of poly(2-(2-decyltetradecyl)-6-(5-(5'-methyl [2,2'-bithiaol]-5-yl)-3-(5-methyl-pyridin-2-yl)-5-(tricosan-11-yl)-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione) (PDBPyBTz). The n-channel copolymer allowed investigation of the impact of electron-withdrawing moieties on conjugated polymer device performance and the utility of the A A molecular design strategy. As an analogue to benzene, the pyridines flanking the diketopyrrolopyrrole moiety in PDBPyBTz were strategically chosen to lower the energy levels and impart planarity to the monomer, both of which aid in achieving stable n-channel performance. Incorporation of PDBPyBTz into a bottom-gate/bottom-contact OFET afforded a device that exhibited unipolar electron transport. In addition to developing a high-performance n-channel polymer, this study allowed for an investigation of structure-property relationships crucial to the design of such materials in high demand for sustainable technologies, including organic photovoltaics and other solution-processed organic electronic devices.