Tang Man-Chung, Chan Carmen Ka-Man, Tsang Daniel Ping-Kuen, Wong Yi-Chun, Chan Maggie Mei-Yee, Wong Keith Man-Chung, Yam Vivian Wing-Wah
Department of Chemistry, The University of Hong Kong, Pokfulam Road (Hong Kong), Fax: +(852) 2857-1586, Tel: +(852) 2859-2153.
Chemistry. 2014 Nov 10;20(46):15233-41. doi: 10.1002/chem.201404313. Epub 2014 Sep 26.
A novel isoquinoline-containing C^N^C ligand and its phosphorescent triphenylamine-based alkynylgold(III) dendrimers have been synthesized. These alkynylgold(III) dendrimers serve as phosphorescent dopants in the fabrication of efficient solution-processable organic light-emitting devices (OLEDs). The photophysical, electrochemical, and electroluminescence properties were studied. A saturated red emission with CIE coordinates of (0.64, 0.36) and a high EQE value of 3.62% were achieved. Unlike other red-light-emitting iridium(III) dendrimers, a low turn-on voltage of less than 3 V and a reduced efficiency roll-off at high current densities were observed; this can be accounted for by the enhanced carrier transporting ability and the relatively short lifetimes in the high-generation dendrimers. This class of alkynylgold(III) dendrimers are promising candidates as phosphorescent dopants in the fabrication of solution-processable OLEDs.
一种新型含异喹啉的C^N^C配体及其基于三苯胺的磷光炔基金(III)树枝状大分子已被合成。这些炔基金(III)树枝状大分子在高效溶液可加工有机发光器件(OLED)的制造中用作磷光掺杂剂。对其光物理、电化学和电致发光性质进行了研究。实现了CIE坐标为(0.64, 0.36)的饱和红色发射和3.62%的高外量子效率值。与其他发红光的铱(III)树枝状大分子不同，观察到开启电压低于3 V且在高电流密度下效率滚降降低；这可以通过增强的载流子传输能力和高代树枝状大分子中相对较短的寿命来解释。这类炔基金(III)树枝状大分子有望成为溶液可加工OLED制造中磷光掺杂剂的候选材料。
