聚乙烯基咔唑与Alq_3混合薄膜的发光性能与能量传递过程  

Luminescence properties and energy transfer in the mixed thin film of Alq_3 and PVK

作　　者：孙世菊[1] 滕枫[1] 徐征[1] 张延芬[1] 侯延冰[1] 

机构地区：[1]北京交通大学光电子技术研究所,北京100044

出　　处：《物理学报》2004年第11期3934-3939,共6页Acta Physica Sinica

基　　金：国家重点基础研究发展规划项目 (批准号 :2 0 0 3CB3 14 70 7);国家自然科学基金 (批准号 :90 3 0 10 0 4);北京市自然科学基金 (批准号 :2 0 5 2 0 15 );北京交通大学论文基金资助的课题~~

摘　　要：研究了Alq3与聚乙烯基咔唑 (PVK)按不同比例的混合体系制备的薄膜的发光特性 .通过对混合薄膜的吸收光谱、激发光谱和发射光谱的分析 ,研究了PVK与Alq3之间的能量传递规律 .当Alq3与PVK的质量比为 1∶7时 ,能量传递效率最高 .用一个由单链模型扩展到包括杂质的哈密顿量对实验进行模拟 。In this paper, the properties of fluorescence were studied of the thin films with different component ratios of polyvinyl carbazole(PVK)and Alq 3. The energy transfer between PVK and Alq 3 was studied through analysis of absorption spectra, excitated spectra, emission spectra of the thin films. When the content of Alq 3 was high enough,the peak of Alq 3 was quite evident in the absorption spectra and excitated spectra, at the same time the emission spectra was the characteristic emission band of Alq 3.When the content of PVK was high enough, the peak value of PVK is much greater than that of Alq 3. At this time the extraordinary strong characteristic emission band of Alq 3 and the feeble characteristic emission band of PVK was observed. It is proved that the energy can transfer from PVK to Alq 3 in a wide concentration range and it is most efficient at the concentration of 1∶7. A model Hamitonian based on single chain model including the dopant was put forward to simulate the experiment .This model can explain the experimental results very well.

关 键 词：ALQ3 PVK 发光性能 发光特性 能量传递过程 薄膜 发射光谱 聚乙烯基咔唑 哈密顿量 混合体系 

分 类 号：O484[理学—固体物理] TN383[理学—物理]