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通过将掺杂剂单元用化学键接到聚芴的侧链上,实现了掺杂剂单元在高分子主体中的分子水平分散,开发了一种新型的基于掺杂剂/主体材料体系的分子分散型蓝光聚芴衍生物.与纯聚芴相比,这种新的分子分散型蓝光聚芴衍生物具有很高的荧光量子效率.以这种新的分子分散型蓝光聚芴衍生物为增益介质的激光器件,在Nd:YAG 355 nm脉冲激光泵浦下,获得了较好的放大自发发射光谱,阈值达到0.25 m J/(pulse cm2).从光物理的角度对薄膜的光学增益和光学损耗进行了定量运算和分析,经过拟合发现,当泵浦能量为0.06m J/pulse时,该聚芴衍生物增益系数可达23.08 cm-1,损耗系数为6.96 cm-1.优良的放大自发发射特性表明该聚芴衍生物是非常好的有机激光增益介质材料.
By chemically bonding the dopant units to the side chains of the polyfluorene, molecular level dispersion of the dopant units in the polymer body is achieved, and a new type of molecular dispersion based on a dopant / host material system has been developed Type blue polyfluorene derivative. Compared with pure polyfluorene, the novel molecular dispersion type blue polyfluorene derivative has high fluorescence quantum efficiency. Taking the novel molecularly dispersed blue polyfluorene derivative as a gain medium , A better amplification of spontaneous emission spectra was obtained at a pulsed Nd: YAG 355 nm laser with a threshold value of 0.25 mJ / (pulse cm2). The optical gain and optical loss The results show that when the pump energy is 0.06m J / pulse, the gain coefficient of the polyfluorene derivative is up to 23.08 cm-1 and the loss coefficient is 6.96 cm-1. Emission characteristics show that the polyfluorene derivative is a very good organic laser gain medium material.