摘要
通过对聚乙烯咔唑(PVK)掺杂三(2-苯基吡啶)铱(Ir(ppy)3)和4-二氰亚甲基-2-叔丁基-6-(1,1,7,7-四甲基久咯呢定基-9-烯基)-4H-吡喃(DCJTB),PVK掺杂DCJTB和PVK掺杂Ir(ppy)3聚合物在成膜时高压电场作用下分子取向变化对单线态和三线态激子形成截面的研究,发现,随着成膜时电场的增强,单线态激子的形成截面在增加,而三线态激子的形成截面却减小.
Ir （PPY）3 and DCJTB doped PVK films were fabricated in the presence of electric field which induced the orientation of polymer moleeules, and their photolumineseenee and eleetrolumineseenee were measured. The influenee of eleetrie field-indueed orientation on the formation cross-sections of singlet and triplet exeitons is investigated. The results showed that the electric field- induced orientation of polymer does not cause significant change in PL spectrum. However, the orientation of polymer results in obvious ehange in EL speetrum. For the deviees based on polarized PVK, the EL from triplet states is redueed, whieh shows that polarization of PVK leads to the increase in the formation cross-section of singlet exeiton and the decrease in the formation of triplet exeiton.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第5期2845-2851,共7页
Acta Physica Sinica
基金
教育部跨世纪人才基金
教育部重点项目(批准号:105041)
国家自然科学基金(批准号:90401006
10434030和90301004)
973计划(批准号:2003CB314707)
华南理工大学特种功能材料及其制备新技术教育部重点实验室资助的课题~~
关键词
分子取向
激子形成截面
三线态
单线态
molecular orientation, exciton cross-section, triplet state, singlet state
