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采用溶液法制备出一系列掺杂比例(摩尔比最高达100:1)的片状蒽/并四苯有机混晶,并对其进行了系统的表征.通过改变并四苯的掺杂浓度,可以实现对混晶发光颜色由蓝绿到绿进而到黄绿的调控.对蒽/并四苯混晶光学性质的研究发现,混晶的发射光谱中出现了并四苯的敏化荧光,同时蒽的发光被部分地猝灭.并且在蒽/并四苯混晶中,基质蒽的荧光衰减速率较其单晶时大大加快,而并四苯的发光寿命相对其单晶时则显著增大.上述实验结果表明该混晶体系中存在蒽到并四苯的能量转移.
A series of flake-like anthracene / tetracene organic mixed crystals with a doping ratio up to 100: 1 were prepared by solution method and systematically characterized.Through changing the doping concentration of tetracene, Can be achieved on the mixed crystal luminescence color from blue-green to green and then to the yellow-green control.Characteristic of anthracene / tetracene mixed crystal optical properties found that the mixed crystal emission spectra of sensitized tetracene fluorescence, at the same time The luminescence of anthracene is partially quenched, and in anthracene / tetracene mixed crystals, the fluorescence decay rate of anthracene is much faster than that of monoclinic, and the emission lifetime of tetracene is significantly increased compared with that of monoclinic The above experimental results show that there is anthracene-tetracene energy transfer in the mixed crystal system.