溶剂蒸发退火聚合物诱导红荧烯的结晶

Crystallization of Rubrene Induced by Polymer Under Solvent Vapor Annealing Condition

在掺杂氟的二氧化锡(FTO)透明导电玻璃衬底上分别以聚碳酸酯(PC)、聚乳酸(PLA)和聚对苯二甲酸乙二醇酯(PET)作为异质诱导层,采用溶剂蒸发退火(SVA)的方法制备了红荧烯晶体薄膜,通过偏光显微镜(POM)、X射线衍射仪(XRD)研究了晶体薄膜的结构和形态,探讨了聚合物种类、聚合物溶液质量浓度以及红荧烯溶液质量浓度对结晶的影响。分析发现,PC作为基底对红荧烯结晶的诱导效果优于PLA和PET,并分别确定了以PC为基底时聚合物和红荧烯溶液的最佳旋涂质量浓度。结果表明,在退火过程中,随着红荧烯溶液质量浓度的增加,晶体薄膜经历了从以三斜晶系为主到以正交晶系为主的晶型转变,在PC溶液质量浓度为5 mg/mL、红荧烯溶液质量浓度为9 mg/mL时,红荧烯结晶覆盖率高,结晶效果较好。

Polycarbonate(PC),polylactic acid(PLA)and polyethylene terephthalate(PET)were used as heterogeneous induced layer on the conductive transparent glass substrate doped with fluorine-tin-oxide(FTO),respectively,then the crystal thin films of rubrene were prepared by the solvent vapor annealing(SVA)method.The structures and morphologies of the crystal thin films were studied by polarized optical microscopy(POM)and X-ray diffraction(XRD).The effects of the varieties of polymers,the mass concentration of the polymer solution and the mass concentration of the rubrene solution on the crystallization were discussed.It is found that the induction effect of PC as the substrate on the crystallization of rubrene is better than those of PLA and PET,and the optimum spin-coating mass concentrations of polymer and rubrene solution with PC as the substrate were determined.The results show that during annealing process,the crystal form of the crystal film transforms the predominant growth from a triclinic crystal system to a orthorhombic crystal system.When the mass concentration of the PC solution is 5 mg/mL and the mass concentration of rubrene solution is 9 mg/mL,the crystal coverage of rubrene is high and the crystallization effect is better.