Self-Assembly of a Donor-Acceptor Dyad Across Multiple Length Scales: Functional Architectures for Organic Electronics
Self-Assembly of a Donor-Acceptor Dyad Across Multiple Length Scales: Functional Architectures for Organic Electronics
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DOI：
10.1002/adfm.200900366
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发表时间：
2009-08-10
影响因子：
19
通讯作者：
Samori, Paolo
中科院分区：
文献类型：
--
作者：
Mativetsky, Jeffrey M.;Kastler, Marcel;Samori, Paolo
基于多环电子供体 (D) 和电子受体 (A) 单元的分子二元体代表了形成高度有序、可溶液加工、纳米隔离的 D-A 域的合适构建块，可用于（光）电子应用。一种新的二元体，基于由亚乙炔连接体分隔的烷基取代的六-六苯并晕烯（HBC）和苝单酰亚胺（PMI），被证明具有在多个长度尺度上自组装成有序超分子排列的高度倾向：宏观挤出长丝显示出长程晶体有序性，纳米纤维网络通过简单的旋涂产生，具有层状堆积的单分子层通过物理吸附形成解决方案-HOPG接口。此外，高度均匀的介观带具有原子级平坦的面和单分子高度的台阶，在溶剂蒸汽退火时自组装。晶体管配置中 HBC-PMI 薄膜和介观带的电学测量显示出具有良好平衡的 p 型和 n 型迁移率的双极输运。由于超分子水平有序度的提高，基于带的器件的迁移率增加了一个数量级以上。
Molecular dyads based on polycyclic electron donar (D) and electron acceptor (A) units represents suitable building blocks for forming highly ordered, solution-processable, nanosegregated D-A domains for potential use in (opto)electronic applications. A new dyad, based on alkyl substituted hexa-peri-hexabenzocoronene (HBC) and perylene monoimide (PMI) separated by an ethinylene linker, is shown to have a high tendency to self-assemble into ordered supramolecular arrangements at multiple length scales: macroscopic extruded filaments display long-range crystalline order, nanofiber networks are produced by simple spin-coating, and monolayers with a lamellar packing are formed by physisorption at the solution-HOPG interface. Moreover, highly uniform mesoscopic ribbons bearing atomically flat facets and steps with single-molecule heights self-assemble upon solvent-vapor annealing. Electrical measurements of HBC-PMI films and mesoscopic ribbons in a transistor configuration exhibit ambipolar transport with well balanced p- and n-type mobilities. Owing to the increased level of order at the supramolecular level, devices based on ribbons show mobility increases of more than one order of magnitude.