Highly Efficient Blue Light-Emitting Diodes Based on Diarylanthracene/Triphenylsilane Compounds
作者:Jeong Keun Park、Kum Hee Lee、Jung Sun Park、Ji Hoon Seo、Young Kwan Kim、Seung Soo Yoon
DOI:10.1166/jnn.2011.3698
日期:2011.5.1
New host materials have been designed and synthesized, (4-(10-(naphthalen-2-yl)anthracen-9-yl)phenyl)triphenylsilane (ANPTPS) and (9,9-dimethyl-7-(10-(naphthalen-2-yl)anthracen-9-yl)-9H-fluoren-2-yl)triphenylsilane (ANFTPS), and photophysical characteristics investigated to determine suitability as candidates for blue light-emitting materials. To explore the electroluminescent properties, multilayered OLEDs were fabricated with the device structure of ITO/NPB/Host (ANPTPS and ANFTPS): 8% Dopant (PFVtPh and PCVtPh)/Bphen/Liq/Al. By using a host (ANPTPS) and a dopant (PFVtPh) as the emitting layer, high-efficiency blue OLEDs were fabricated with a maximum luminance of 3991 cd/cm2 at 8.0 V, a luminous efficiency of 5.99 cd/A at 20 mA/cm2, a power efficiency of 3.11 lm/W at 20 mA/cm2, an external quantum efficiency of 4.13% at 20 mA/cm2, and CIEx, y coordinates of (x = 0.15, y = 0.18) at 8.0 V.
我们设计并合成了新的宿主材料--(4-(10-(萘-2-基)蒽-9-基)苯基)三苯基硅烷(ANPTPS)和(9,9-二甲基-7-(10-(萘-2-基)蒽-9-基)-9H-芴-2-基)三苯基硅烷(ANFTPS),并研究了它们的光物理特性,以确定它们是否适合作为蓝光发光材料的候选材料。为了探索电致发光特性,我们制作了多层有机发光二极管,其器件结构为 ITO/NPB/Host(ANPTPS 和 ANFTPS):8%掺杂剂(PFVtPh 和 PCVtPh)/Bphen/Liq/Al。通过使用宿主(ANPTPS)和掺杂剂(PFVtPh)作为发光层,制备出了高效蓝色有机发光二极管,在 8.0 V 时的最大亮度为 3991 cd/cm2,在 20 mA 时的发光效率为 5.在 20 mA/cm2 时,发光效率为 5.99 cd/A;在 20 mA/cm2 时,功率效率为 3.11 lm/W;在 20 mA/cm2 时,外部量子效率为 4.13%;在 8.0 V 时,CIEx、y 坐标为 (x = 0.15,y = 0.18)。