Synthesis Of P-type Semiconductor Materials Based On C-HBC

In recent years,"organic photovoltaic devices" research has been the academic attention.In particular,heterogeneous heterojunction polymer solar cells with its potential advantages-low cost,light weight,with good flexibility and simple manufacturing methods,has aroused widespread concern of scientists around the world.The bulk heterojunction solar cells are prepared using P-type(or n-type)organic semiconductors and electron acceptor materials(or donor materials).The transformation efficiency of the device is stable at about 10%.Although the energy conversion efficiency of organic photovoltaic cells has increased significantly over the past few years,the development of new optoelectronic materials is still the focus of current research.Fused aromatic hydrocarbons,because of its good electrical and self-assembly characteristics,in recent years has been widespread concern.There are two kinds of hexabenzocoronene(HBC),planar(p-HBC)and nonplanar(c-HBC).The Nuckolls group reported a series of c-HBC derivatives with good electrical properties and self-assembled properties.Because of their non-planar structure,these molecules can be self-assembled to form nanowires and nanotubes,and can form complementary shapes with C60.The derivatives of c-HBC can also be bowl or hemispherical.And because the molecules are non-coplanar,will produce a very different intermolecular force,the ability of molecular self-assembly will be greatly enhanced.In this paper,the monomer with methynyl HBC was synthesized by Sonogashira cross-coupling reaction,and then the catalyst was prepared by using catalyst tri(tert-butoxy)(2,2-dimethylpropynyl)tungstenThe methylene oxide HBC monomer was synthesized by its own cross-coupling reaction to synthesize HBC-based polymers;At the same time,two different methods of synthesis of alkenyl HBC as monomer polymer.The method comprises the following steps: synthesizing the alkenyl HBC polymer by coupling the iodine HBC with the trans-1,2-bis(tri-n-butyltin)ethylene by the tetrazenzylphosphine palladium catalyst.Method 2 The organo HBC monomer was synthesized by the Stille coupling reaction to synthesize the alkenyl HBC under the catalyst conditions,and then the alkenyl HBC monomer was synthesized by the cross-coupling reaction under the Grubbs catalyst.Finally,the structural characterization and optical properties of synthetic intermediates and products were determined.