State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China.
Opt Lett. 2010 Jul 15;35(14):2436-8. doi: 10.1364/OL.35.002436.
We realize high luminous efficiency (LE) in white polymer light-emitting devices by employing a wide bandgap polymer P36HCTPSi as host and introducing a blue-yellow two-color system for obtaining white emission. Phosphorescent dopants bis[(4,6-difluorophenyl)pyridinato-N,C(2)]-(picolinato)iridium(III) (FIrpic) and iridium(III) bis(2-(9,9'-spirobi[fluorene]-7-yl)pyridine-N,C(2')) acetylacetonate [Ir(SBFP)(2) (acac)] were used as blue and yellow emitters, respectively. Electroluminescent spectra and LE were both affected by Ir(SBFP)(2)(acac) concentration; the device with low concentration (0.4 wt.%) showed white emission with a LE of 24.1 cd/A at 1000 cd/m(2), while the one with high concentration (4 wt.%) emitted yellowish-white light with a higher LE of 47.3 cd/A at 1000 cd/m(2).
我们通过采用宽带隙聚合物 P36HCTPSi 作为主体，并引入蓝-黄双色体系来获得白色发射，从而实现了白色聚合物发光器件的高光效 (LE)。磷光掺杂剂双 [(4,6-二氟苯基)吡啶基-N,C(2)]-(吡啶基)铱 (III) (FIrpic) 和铱 (III) 双 (2-(9,9'-螺二芴基)-7-基)吡啶-N,C(2'))乙酰丙酮化物 [Ir(SBFP)(2)(acac)] 分别用作蓝色和黄色发射器。电致发光光谱和 LE 都受到 Ir(SBFP)(2)(acac)浓度的影响；浓度较低（0.4wt%）的器件显示出白色发射，在 1000 cd/m²时的 LE 为 24.1 cd/A，而浓度较高（4wt%）的器件则发出略带黄色的白光，在 1000 cd/m²时的 LE 为 47.3 cd/A。
