Robust and highly efficient blue light-emitting hosts based on indene-substituted anthracene
作者:Zhen-Yuan Xia、Zhi-Yun Zhang、Jian-Hua Su、Qiong Zhang、Ka-Man Fung、Mei-Ki Lam、King-Fai Li、Wai-Yeung Wong、Kok-Wai Cheah、He Tian、Chin H. Chen
DOI:10.1039/c000092b
日期:——
Two new unsymmetrically indene-substituted 10-naphthylanthracene derivatives, 9-(4-(1,1′-dimethylinden-3-yl)phenyl)-10-(1-naphthyl)anthracene (DMIP-1-NA) and 9-(4-(1,1′-dimethylinden-3-yl)phenyl)-10-(2-naphthyl)anthracene (DMIP-2-NA), were easily synthesized. Both of them show intense fluorescence and good thermal stability. Three-layer organic light-emitting devices (OLEDs) using these anthracene derivatives as blue host materials and diphenyl-[4-(2-[1,1′;4′,1′′]terphenyl-4-yl-vinyl)-phenyl]amine (BD-1) as the dopant emitter have been fabricated. Highly efficient and color stable OLEDs were achieved under the range of doping concentration from 3% to 7%. A further optimized device structure based on DMIP-2-NA exhibited a maximum power efficiency of 8.39 lm W−1 (7.6 cd A−1 at 2.90 V) with a pure blue emission at CIEx,y coordinates of (0.14, 0.18).
本研究轻松合成了两种新的不对称茚取代 10-萘基蒽衍生物,即 9-(4-(1,1′-二甲基茚-3-基)苯基)-10-(1-萘基)蒽 (DMIP-1-NA) 和 9-(4-(1,1′-二甲基茚-3-基)苯基)-10-(2-萘基)蒽 (DMIP-2-NA)。这两种物质都具有强烈的荧光和良好的热稳定性。以这些蒽衍生物为蓝色主材料,以二苯基[4-(2-[1,1′;4′,1′′]terphenyl-4-yl-vinyl)-phenyl]胺(BD-1)为掺杂发射体,制备了三层有机发光器件(OLED)。在 3% 至 7% 的掺杂浓度范围内,实现了高效且色彩稳定的 OLED。基于 DMIP-2-NA 的进一步优化器件结构显示出 8.39 lm W-1 的最大功率效率(2.90 V 时为 7.6 cd A-1),在 CIEx、y 坐标为 (0.14, 0.18) 时发出纯蓝色光。