Iridium complexes containing 2-aryl-benzothiazole ligands: color tuning and application in high-performance organic light-emitting diodes
作者:Jiuyan Li、Renjie Wang、Ruixia Yang、Wei Zhou、Xin Wang
DOI:10.1039/c3tc30586d
日期:——
major cyclometalating ligands of iridium complexes, in which the aryl groups were N-phenyl-3-carbazolyl, 2-(9,9-dioctyl)fluorenyl and N-phenyl-2-carbazolyl. The homoleptic tris-cyclometalated and heteroleptic bis-cyclometalated iridium complexes, 1–5, were synthesized using these ligands. By adjusting the chemical structures and then the electronic state of these complexes, we were able to continuously
设计并合成了三个2-芳基-苯并噻唑发色团,作为铱配合物的主要环金属配体,其中的芳基为N-苯基-3-咔唑基,2-(9,9-二辛基)芴基和N-苯基- 2-咔唑基。使用这些配体合成了均配的三环金属化和杂配的双环金属化铱配合物1-5。通过调节这些配合物的化学结构,然后调节其电子态,我们能够连续地将磷光从黄色变为饱和红色,峰值波长的顺序为1 < 2 < 3 < 4 < 5。量子化学计算和电化学数据清楚地证明了磷光颜色调谐的起源。包含这些铱配合物作为掺杂发射体的有机发光二极管(OLED)表现出黄色至红色的电磷光,并具有出色的性能。特别地,复杂1基于设备产生75.9 CD A的高效率-1,48.2流明w ^ -1,和23.0%与CIE(0.46,0.53),其代表最高效率为黄色的OLED到现在。此外,结合蓝色荧光粉和高效率57.9 cd A -1,使用1来制造两元素白色OLED。 达到了21.9%,这是