新颖聚(芴ALT -咔唑)(PFCz)与3,6-咔唑基共聚物ñ -烷基接枝的铱配合物使用2,3- diphenylpyrazine作为配体(IrBpz)通过铃木缩聚合成。当共聚物与1摩尔%的铱络合物共聚时,主体聚合物PFCz的发射被完全淬灭。从磷光聚合物发光二极管(PhPLED)观察到CIE坐标为(0.56,0.42)的橙红色发射。用这种共聚物-铱配合物制成的PhPLED的最大发光效率(LE)为5.58 cd / A,最大亮度为8625 cd / m 2。。从由含0.4mol%铱配合物的共聚物制成的白色PhPLED(WPhPLED)中观察到CIE坐标为(0.33,0.27)的白光。从WPhPLED中观察到的LE为2.30 cd / A,亮度为2068 cd / m 2。
white-light-emitting electrophosphorescent copolymers were designed and synthesized via Suzuki polymerization. These copolymers were constructed by grafting a small amount of fluorinated iridiumcomplexes as the side chain of the poly(fluorene-co-2,3-bisphenyl-6-fluoroquinoxaline) backbone. Efficient white-light emission was obtained simultaneously from the fluorescent blue light-emitting backbone and the tethered
通过铃木聚合反应设计并合成了高效的二元白色发光电致磷光共聚物。这些共聚物通过接枝氟化铱络合物少量作为聚(芴的侧链构成共-2,3-双苯基-6-氟喹喔)主链。从发荧光的蓝色发光主链和束缚的发磷光的黄色发光铱物种同时获得有效的白光发射。基于共聚物PFQ-IrFppy获得的国际发光委员会坐标为(0.32,0.38)的峰值发光效率为7.20 cd A -1。在不同的施加电压下,共聚物产生的器件的白光发射在整个白光区域内是稳定的,并且发光效率随电流密度的增加而略有下降。这些观察结果强调了同时利用主链的蓝色荧光和侧链的黄色磷光的策略可能是实现有效的二元白光发射的一种令人鼓舞的方法。
Efficient saturated red light-emitting polyfluorenes containing iridium complexes in side chains
quenched by tethered iridiumcomplexes even though with the content of iridiumcomplexes being as low as 1 mol%. Saturated red light-emitting diodes were fabricated on the basis of these two series of copolymers. The best device performance with a maximum external quantum efficiency of 7.8% on the basis of copolymer PF-IrNiq1 was achieved, which was among the highest efficiencies of the reported electrophosphorescent
Synthesis and characterization of red light-emitting electrophosphorescent polymers with different triplet energy main chain
作者:Zhihua Ma、Junqiao Ding、Yanxiang Cheng、Zhiyuan Xie、Lixiang Wang、Xiabin Jing、Fosong Wang
DOI:10.1016/j.polymer.2011.03.023
日期:2011.5
light-emitting electrophosphorescent polymers with poly(fluorene-alt-carbazole) (PFCz) and poly(3,6-carbazole) (PCz) as the main chain, and the quinoline-basediridium (Ir) complex as the side chain have been synthesized by Suzuki and modified Yamamoto polymerization, respectively. The triplet energy of the polymeric backbone is tuned from 2.1 eV of polyfluorene (PF) to 2.3 eV of PFCz and 2.6 eV of
Novel orange-red light-emitting polymers with cyclometaled iridium complex grafted in alkyl chain
作者:Lei Ying、Jianhua Zou、Anqi Zhang、Bing Chen、Wei Yang、Yong Cao
DOI:10.1016/j.jorganchem.2009.05.007
日期:2009.8
Novel poly(fluorene-alt-carbazole) (PFCz) based copolymers with 3,6-carbazole-N-alkyl graftediridiumcomplex using 2,3-diphenylpyrazine as ligand (IrBpz) were synthesized by Suzuki polycondensation. The emission of host polymer, PFCz, was completely quenched when the copolymer with 1 mol% of iridiumcomplex. An orange-red emission with CIE coordinate of (0.56, 0.42) was observed from Phosphorescent
新颖聚(芴ALT -咔唑)(PFCz)与3,6-咔唑基共聚物ñ -烷基接枝的铱配合物使用2,3- diphenylpyrazine作为配体(IrBpz)通过铃木缩聚合成。当共聚物与1摩尔%的铱络合物共聚时,主体聚合物PFCz的发射被完全淬灭。从磷光聚合物发光二极管(PhPLED)观察到CIE坐标为(0.56,0.42)的橙红色发射。用这种共聚物-铱配合物制成的PhPLED的最大发光效率(LE)为5.58 cd / A,最大亮度为8625 cd / m 2。。从由含0.4mol%铱配合物的共聚物制成的白色PhPLED(WPhPLED)中观察到CIE坐标为(0.33,0.27)的白光。从WPhPLED中观察到的LE为2.30 cd / A,亮度为2068 cd / m 2。