|
Polyimide is an important class of high-performance polymers, having excellent thermal properties, mechanical properties, electrical properties, dimensional stability, and a structure may be designed, in recent years been more and more as a function of the new optoelectronic material application electromechanical storage, light emitting diodes, thin film transistors, solar cells, etc. in an organic photovoltaic device. Three scientific research: First, how to increase its solubility while maintaining the polyimide excellent performance made the film so that it can be easy; Second, it introduces different from the traditional one-step and two-step method of Preparation of polyimide, but to use another mature - Suzuki polymerization method prepared polyimide, rich polyimide synthetic route; to explore with The functional side groups of the aliphatic polyimide possibility of the application in the photovoltaic device. Paper is divided into five chapters: the first chapter, an overview of the three kinds of optoelectronic devices: Organic Light Emitting Diode, mechanical and electrical storage, basic knowledge and basic principles of organic solar cells, highlighting recent years polyimide three Application Finally, the purpose and content of this thesis. Chapter II, Synthesis of a polyimide having a fluorenyl group \Clearly, the fluorenyl group is introduced into the main chain of the polyimide so that it can be dissolved in common organic solvents, is to give a polyimide excellent solubility without reducing its heat resistance is effective way. Chapter 3, synthesis of a key monomer - dibromophenyl hexafluorobenzene imide imide ring is introduced in this step, and in the second step using a Suzuki polymerization reaction dibromophenyl hexafluorobenzene acyloxy imine and 2,7 - bis (cyclopropane boric acid ester) -9,9 '- dioctylfluorene and 9,9' - dioctyl-2 ,7 - dibromo-fluorenyl polymerizing content (dibromopropyl Methylene hexafluorobenzene imide), respectively, of 5%, 10%, 15% of the polyimide, and the characterization and testing of their structure and properties, and the solubility of the resultant polymer is very good and easy to dissolve in common organic solvents such as: tetrahydrofuran and chloroform, the method on the one hand use of the advantage of easy processing of a polyimide, the other hand, development of a mature suzuki polymerization method, enriching the polyimide synthetic route. Chapter IV, first using conventional methods is preparation of the main chain to an electron-withdrawing nature of the aliphatic-containing polyimide, after which under alkaline conditions, as with N-bromo-hexyl carbazole monomers containing donor properties in order to function side group connected to the polymer main chain, the prepared polyimide containing the structure of carbazole sidechain DA, and the functional polyimide structural characterization and testing, the solubility was observed, thermal properties and optical properties, and to explore the possibility of aliphatic polyimide applications in optoelectronic devices. Chapter V, the full text of the summary, and draw a series of related conclusions.
|