Studies On The Preparation And The Field Effect Device Properties Of Fluorinated Copper Phthalocyanines

There has been great interest in organic semiconductors due to their potential application in large area,low energy consumption,low cost,mechanical flexibility and micro/nanoscale electronic device,and has been considered as the next generation of principle semiconductor devices.Phthalocyanine(Pc)compounds and their derivatives with unique electrical,optical and magnetic properties,and has good thermal stability and chemical stability,molecular composition and structure with controllable regulation performance.Pc compounds is a kind of very prospect application of organic semiconductor materials,has attracted widespread attention.Metal phthalocyanine(MPc)compounds and their derivatives with more excellent properties and wide as the active layer is applied to the organic thin film field effect transistors(OTFTs)devices.Is generally believed that by introducing electron-withdrawing groups can regulate the electric charge of MPc transmission performance,made the p-type into n-type of organic semiconductor materials.Therefore,this paper aimed at different number of electron-withdrawing groups fluorine atoms to replace copper phthalocyanine(FxCuPc,x = 4,8,12,16)compounds in the synthesis and performance of field effect transistors.The concrete research content is as follows:In this paper through fluoro phthalimide,fluoro phthalic anhydride,fluoro phthalonitrile methods prepared FxCuPc(x = 4,8,12,16),the yield of 64.61%,46.67%,85.31% and 60.00% respectively.The target products of FxCuPc(x = 4,8,12,16)was carried out the MALDI-TOF-MS,UV-Vis,IR,CV,SEM and the material intrinsic mobility(?)physical and chemical research.F16PcCu employed as the active layer in the OTFTs and optimized the field effect devices.Studied different substrate temperature influence on F16 CuPc OTFTs devices showed the optimal performance when the temperature of 110 °C.Induced OTS and p-6P layer to the OTFTs device,studied the influence of different substrate temperature on the field effect devices.Based on OTS and p-6P induced layer devices the best substrate temperature were 50 °C and 110 °C,respectively,have been formed high quality organic semiconductor thin films.Especially with p-6P as induction layer,the highest electron mobility can reached 0.42 cm2V-1s-1.Studied the life of F16CuPc/p-6P/SiO2 OTFTs,when placed of eight months in air environment,the electron mobility still than the new preparation of F16CuPc/SiO2 OTFTs without modification.Further studied the FxCu Pc(x = 4,8,12,16)OTFTs devices.The influence of number of fluorine atoms on molecule geometries,frontier molecular orbitals,thin film morphology and microstructure as well as molecular aggregation patterns is systematically.OTFTs were fabricated to evaluate the semiconducting and charge transport properties of FxCuPc.Test results show that F4 CuPc exhibited an electron mobility of 2.6×10-4 cm2V-1s-1.F8 CuPc exhibited an electron mobility of 1.75×10-4 cm2V-1s-1.F12 CuPc OTFT device were revealed to show an ambipolar performance with carrier mobilities of 0.005 cm2V-1s-1 for holes and 0.006 cm2V-1s-1 for electrons.Perfluorinated copper phthalocyanines(F16CuPc)exhibited an electron mobility of 0.27 cm2V-1s-1 in air.Through adjusted the energy level of semiconductor materials were tuned to function as single-component p-,ambipolar and n-type semiconductors for single-component organic thin-film transistors(OTFTs).