Highly Efficient Blue Light-Emitting Materials Based on Arylamine Substituted DPVBi Derivatives
作者:Suhyun Oh、Kum Hee Lee、Ji Hyun Seo、Young Kwan Kim、Seung Soo Yoon
DOI:10.1166/jnn.2011.4798
日期:2011.8.1
A series of arylamine substituted DPVBi derivatives (1–4) were synthesized via the Horner-Wadsworth-Emmons reaction. Their electroluminescent properties were examined by fabricating a multilayer OLED device with the following structure: ITO/DNTPD (40 nm)/NPB (20 nm)/2% DPVBi derivatives (1–4) doped in MADN (20 nm)/Alq3 (40 nm)/Liq (1.0 nm)/Al. All devices showed efficient blue emission. In particular, a high efficiency blue OLED was fabricated using compound 1 as a dopant in the emitting layer. The maximum luminance, luminous efficiency, power efficiency and CIE coordinates of the blue OLED using compound 1 as a dopant were 16110 cd/m2 at 10 V, 10.1 cd/A at 20 mA/cm2, 4.37 lm/W at 20 mA/cm2, and (x = 0.197, y = 0.358) at 8 V, respectively. Moreover, a device using compound 4 as the dopant exhibited efficient deep blue emission with a luminance, luminous efficiency, power efficiency and CIE coordinates of 7005 cd/m2 at 10 V, 6.25 cd/A at 20 mA/cm2, 2.50 lm/W at 20 mA/cm2 and (x = 0.151, y = 0.143) at 8 V, respectively.
通过 Horner-Wadsworth-Emmons 反应合成了一系列芳基胺取代的 DPVBi 衍生物(1-4)。通过制造具有以下结构的多层 OLED 器件,考察了它们的电致发光特性:ITO/DNTPD(40 nm)/NPB(20 nm)/掺杂了 MADN(20 nm)/Alq3(40 nm)/Liq(1.0 nm)/Al 的 2% DPVBi 衍生物 (1-4)。所有器件都显示出高效的蓝色发射。特别是,利用化合物 1 作为发射层的掺杂剂,制造出了高效率的蓝色 OLED。使用化合物 1 作为掺杂剂的蓝色 OLED 的最大亮度、发光效率、功率效率和 CIE 坐标分别为:10 V 时 16110 cd/m2,20 mA/cm2 时 10.1 cd/A,20 mA/cm2 时 4.37 lm/W,8 V 时 (x = 0.197, y = 0.358)。此外,使用化合物 4 作为掺杂剂的器件显示出高效的深蓝色发射,其亮度、发光效率、功率效率和 CIE 坐标分别为:10 V 时 7005 cd/m2、20 mA/cm2 时 6.25 cd/A、20 mA/cm2 时 2.50 lm/W 和 8 V 时 (x = 0.151, y = 0.143)。