摘要
介绍了4种新型发光材料苯-烷氧基苯共聚物的合成方法,材料的VU-Vis吸收光谱及其薄膜和溶液的光致发光性能。用电化学掺杂方法测定了其能带结构,并讨论了烷氧基侧基长度对高聚物发光强度的影响。结果表明,这4种高聚物在紫外光激发下均发蓝光,π-π 跃迁(Eg)值为3.2-3.3eV,烷氧基中碳原子数为10个左右时发光强度最高。
Conjugated polymers offer many advantages as materials for light-emitting diodes. They are mechanically flexible, and can be fabricated and patterned with relative ease by casting from solution, and the emitted light color of these semiconducting and luminescent polymers can be controlled by designing the molecular structure. Among the blue emitting materials, poly(paraphenylene) (PPP) and its derivatives are promising because of their high photoluminescence(PL) efficiency. The stability of PPP and the solubility of PPP with side groups are the focus of our concern. Four luminescent materials of conjugated copoly(phenylene-alkoxyphenylene)s were synthesized, all these polymers have excellent solubility in common organic solvents. The UV-Vis absorption spectra and the photoluminescence properties of their films and solvents were studied, and their energy band structures were inspected through electrochemical methods. The effect of alkoxy side chains on luminescence intensity of the polymers was discussed. The results showed that these four polymers emitted blue lights with excitation of UV rays, and energy values of π-π* transition were within 3.2-3.3eV. The luminescence intensity reached the peak when the polymers had the alkoxy side chain with about 10 carbon atoms.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2003年第5期493-496,共4页
Chinese Journal of Luminescence
