Pure red electrophosphorescence from polymer light-emitting diodes doped with highly emissive bis-cyclometalated iridium(III) complexes
作者:Hidetaka Tsujimoto、Shigeyuki Yagi、Hotaka Asuka、Yuji Inui、Shigeru Ikawa、Takeshi Maeda、Hiroyuki Nakazumi、Yoshiaki Sakurai
DOI:10.1016/j.jorganchem.2010.05.011
日期:2010.8
In order to develop highly emissive red phosphorescent materials for OLED application, novel bis-cyclometalated iridium(III) complexes were developed using the 1-(dibenzo[b,d]furan-4-yl)isoquinolinato-N,C3′ (dbfiq) cyclometalating ligand. When 1,3-bis(3,4-dibutoxyphenyl)propane-1,3-dionate (bdbp) is employed as an ancillary ligand, Ir(dbfiq)2(bdbp) 1 exhibits red photoluminescence (PL) at 640 nm with
为了开发用于OLED的高发射红色磷光材料,使用1-(二苯并[ b,d ]呋喃-4-基)异喹啉基-N,C 3'(dbfiq)开发了新型的双环金属化铱(III)配合物。)环金属配体。当使用1,3-双(3,4-二丁氧基苯基)丙烷-1,3-二酸酯(bdbp)作为辅助配体时,Ir(dbfiq)2(bdbp)1在640 nm处显示红色光致发光(PL)。量子产率(Φ PL的0.61)(在甲苯中,298 K)。将bdbp替换为二戊酰基甲酸酯(DPM)和乙酰丙酮(ACAC)(铱(dbfiq)2(DPM)2和Ir(dbfiq)2(ACAC)3,分别地)不影响PL光谱,但会降低Φ PL〜0.55和0.49对2和3,分别。类似的趋势在掺杂的聚(甲基丙烯酸甲酯)(PMMA)膜也发现,和1是多种发射(Φ PL = 0.17)比2和3(Φ PL 分别为0.08和0.06)。使用1作为磷光掺杂剂,制备了聚合物发光二极管(PLED),其结构为ITO