Synthesis And Characterization Of Perylene Diimide Derivatives

In recent years,with the improvement of people’s living quality,the development of economy and science and technology.People for the use of solar energy technology is constantly improving,the use of solar energy there are two main methods,one is the light to heat conversion,another is to convert sunlight to electricity,solar battery,photoelectric conversion is a concrete manifestation of the way.Research and development of solar cells has been much attention.In the current commercialization of solar cells,inorganic crystalline silicon solar cells occupy a dominant position.However,due to the high cost and complicated processing technology of crystalline silicon,this kind of solar cell is difficult to achieve large-scale popularization.Compared with the inorganic semiconductor,organic semiconductor manufacturing has the advantages of low cost and flexibility and benign;organic solar cell with simple preparation technology,manufacturing area,cheap,simple,flexible and other advantages,so the organic solar cell has become a new direction of the development of solar cell.Organic solar cells mainly include: dye sensitized solar cells,organic small molecule heterojunction cells,organic polymer solar cells,organic inorganic hybrid solar cells.Only the small molecular organic solar cells and organic solar cells,organic matter depends entirely on the exciton dissociation and charge transfer,so we called pure organic solar cell,is currently the fastest development of organic solar cell.According to the different types of transport carriers,the organic charge transport materials can be divided into: P(Holes)type materials(Electrons),N type transmission materials.This section is mainly of N type organic semiconductor materials in two perylene imide(PDI),it is a kind of optical,thermal and chemical stability excellent fluorescent material,whether in the field of academic research and in application of pigments and dyes,has aroused widespread interest and research.The perylene molecules with good flatness,the interaction of bond between molecules is enhanced greatly,with larger lattice energy,therefore the perylene bisimide dissolved most of the poor.Because of its hard perylenebisimide dissolved as fluorescent dye,it was not until 1959 that the characteristics of high fluorescence quantum yield,and began to pay attention to Therefore,in the perylenebisimide different positions of different functional groups are replaced will exhibit photochemical and photophysical properties have a unique style.In view of this situation,we carried out the following two aspects of research work.A major in four perylene imide bending position into the Vinyl,increasing the stacking,in order to enhance the absorption in the visible light region,improve the electron transfer rate.To further adjust the photophysical and photochemical properties of it;on the other hand,by changing the perylene imide two N substituents or growth N alkyl chain length in order to change this kind of compound solubility and aggregation properties.Their spatial structure and photoelectric properties are studied.In this project,we have synthesized some intermediates of PDIs compounds for further study.