几种吡唑啉衍生物的光致发光和电致发光特性研究: 一类 蓝色的OLED发光材料

对四种不同结构的吡唑啉化合物在溶液和薄膜中的光致发光行为及作为掺杂染料组成两种不同结构电致发光(EL)器件的发光行为进行了研究。结果表明,具有相同共轭部分,但未成环的腙类化合物,不论在溶液中或在固相条件下,都不能很好的发射荧光。而构成了吡唑啉环的化合物,则在上述两种情况下都有较强的荧光发射能力。在5位处联有苯基的非平面状吡唑啉化合物,由于不易于结晶化而有良好的成膜性能;相反,在5位处无苯环联结者,如EP3,则由于其易于结晶化,因而不利于器件的制作。

Photoluminescence and electroluminescence behaviors of pyrazoline compounds: A study on the blue colour emitter in EL device

The photoluminescence and electroluminescence behaviors of four types of pyrazoline compounds of different structures dissolved in solution or composed as a dopping dye in the EL device have been studied in this work. Results indicated that the non - cyclic hydrazone compound containing the same conjugated moiety as in pyrazoline is unable to emit strong fluorescence either in solution or in solid film. But, for the pyrazoline compound very strong luminescence can be observed when it was measured in both conditions described above. The pyrazoline compounds with phenyl group at 5 - position possess excellent property of film formation due to the difficulty in crystallization. On the contrary, the pyrazoline compound without phenyl group at 5 - position is unadaptable to preparing EL device, because the layer contained those compounds collapse rapidly due to crystallization.