Organic Chemistry Division, National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411008, India.
Academy of Scientific and Innovative Research (AcSIR), New Delhi, 110020, India.
Chemistry. 2018 May 28;24(30):7695-7701. doi: 10.1002/chem.201800197. Epub 2018 May 9.
One-dimensional (1D) nanostructures of π-conjugated molecules exhibiting excellent charge carrier mobilities have attracted much interest for use in organic electronic devices. Although it is tedious to form such structures, the availability of highly delocalized electron and hole carriers in these donor (D)-acceptor (A) coassemblies realize ambipolar charge transport. Here we demonstrate the use of a simple solution casting method to create an ambipolar donor-acceptor single-crystalline assembly. 1D assemblies of 5,10,15,20-tetraphenylporphyrins (H TPP, ZnTPP) and fullerene (C ) exhibit high ambipolar mobility in the range of 0.8-3.4 cm Vs for electrons and holes with high ON/OFF ratio and low threshold voltage. A direct experimental proof for the pivotal role of the central Zn in tetraphenyl porphyrin, which enables a strong D-A charge transfer interaction in the cocrystal and thereby induces electron (1.35 cm Vs ), hole (3.42 cm Vs ) mobilities, the highest reported for two component D-A assemblies using solution casting, is demonstrated.
一维（1D）的π-共轭分子纳米结构具有优异的电荷载流子迁移率，因此在有机电子器件中得到了广泛关注。尽管形成这种结构很繁琐，但在这些供体（D）-受体（A）共组装体中，高度离域的电子和空穴载体的可用性实现了双极性电荷输运。在这里，我们展示了使用简单的溶液浇铸方法来创建双极性供体-受体单晶组装体。5,10,15,20-四苯基卟啉（H TPP、ZnTPP）和富勒烯（C ）的一维组装体在电子和空穴的范围内表现出高双极性迁移率，为 0.8-3.4 cm Vs，具有高 ON/OFF 比和低阈值电压。对中心 Zn 在四苯基卟啉中所起关键作用的直接实验证明，在共晶中产生了强的 D-A 电荷转移相互作用，从而诱导了电子（1.35 cm Vs）、空穴（3.42 cm Vs）迁移率，这是使用溶液浇铸报道的两种成分 D-A 组装体中最高的。
