100% phosphorescence quantum efficiency of Ir(III) complexes in organic semiconductor films
100% phosphorescence quantum efficiency of Ir(III) complexes in organic semiconductor films
复制标题
DOI：
10.1063/1.1862777
复制
发表时间：
2005-02-14
影响因子：
4
通讯作者：
Adachi, C
中科院分区：
文献类型：
--
作者：
Kawamura, Y;Goushi, K;Adachi, C
我们证明，三个Ir（III）配合物作为主要的掺杂剂在有机电致磷光二极管具有非常高的光致发光量子效率（eta（PL））在固态薄膜。研究了发绿色光的配合物fac-tris（2-phenylpyridinato）iridium（III）[Ir（ppy）（3）]，红色发光的双[2-（2 '-苯并噻吩基）吡啶-N，C-3']（乙酰丙酮）铱（III）[Btp（2）Ir（acac）]和蓝色配合物bis[（4，6-二氟苯基）吡啶-N，C-2]（吡啶基）铱（III）（FIrpic）与常用的主体材料4，4 '-双（N-咔唑基）-2，2'-联苯制备为不同浓度的共沉积膜。Ir（ppy）3、Btp（2）Ir（acac）和FIrpic的最大eta（PL）值分别为97% +/-2%（在1.5摩尔%下）、51% +/-1%（在1.4摩尔%下）和78% +/-1%（在15摩尔%下）。此外，我们还观察到，FIrpic的最大eta（PL）达到99% +/- 1%时，掺杂到高三重态能量主机，间-双（N-咔唑基）苯，在1.2摩尔%的最佳浓度。(C)2005年美国物理学会。
We demonstrate that three Ir(III) complexes used as principal dopants in organic electrophosphorescent diodes have very high photoluminescence quantum efficiency (eta(PL)) in a solid-state film. The green emitting complex, fac-tris(2-phenylpyridinato)iridium(III) [Ir(ppy)(3)], the red-emitting bis[2-(2'-benzothienyl)pyridinato-N,C-3'] (acetylacetonato)iridium(III) [Btp(2)Ir(acac)], and the blue complex bis[(4,6-difluorophenyl)pyridinato-N, C-2](picolinato)iridium(III) (FIrpic) were prepared as codeposited films of varying concentration with 4,4'-bis(N-carbazolyl)-2, 2'-biphenyl, a commonly used host material. The maximum eta(PL) values for Ir(ppy)3, Btp(2)Ir(acac), and FIrpic were, respectively, 97% +/- 2% (at 1.5 mol%), 51% +/- 1% (at 1.4 mol%), and 78% +/- 1% (at 15 mol%). Furthermore, we also observed that the maximum eta(PL) of FIrpic reached 99% +/- 1% when doped into the high triplet energy host, m-bis(N-carbazolyl)benzene, at an optimal concentration of 1.2 mol%. (C) 2005 American Institute of Physics.