A Yellow-Emitting Homoleptic Iridium(III) Complex Constructed from a Multifunctional Spiro Ligand for Highly Efficient Phosphorescent Organic Light-Emitting Diodes
作者:Bao-Yi Ren、Run-Da Guo、Dao-Kun Zhong、Chang-Jin Ou、Gang Xiong、Xiang-Hua Zhao、Ya-Guang Sun、Matthew Jurow、Jun Kang、Yi Zhao、Sheng-Biao Li、Li-Xin You、Lin-Wang Wang、Yi Liu、Wei Huang
DOI:10.1021/acs.inorgchem.7b01034
日期:2017.7.17
phosphorescent organic light-emitting diodes (PhOLEDs), a facial homoleptic iridium(III) complex emitter with amorphous characteristics was designed and prepared in one step from a multifunctional spiro ligand containing spiro[fluorene-9,9′-xanthene] (SFX) unit. Single-crystal X-ray analysis of the resulting fac-Ir(SFXpy)3 complex revealed an enlarged Ir···Ir distance and negligible intermolecular π–π
为了抑制浓度猝灭并改善磷光有机发光二极管(PhOLED)的发射层(EML)中的电荷载流子注入/传输,设计并制备了具有非晶态特征的面部均相铱(III)复合发射体。含有螺[芴-9,9'-吨](SFX)单元的多功能螺配体。对所得的fac -Ir(SFXpy)3络合物的单晶X射线分析显示,Ir···Ir距离增大,螺环配体之间的分子间π-π相互作用可忽略不计。与商用磷光体铱(III)双(4-苯基噻吩并[3,2- c ]吡啶基-N,C2 ')乙酰丙酮酸酯(PO-01)。使用常见主体4,4'-双(N-咔唑基)-1,1'-联苯和fac -Ir(SFXpy)3发射极的掺杂浓度为15 wt%的干法处理设备显示出峰值性能电流效率(CE),功率效率(PE)和外部量子效率(EQE)分别为46.2 cd A - 1、36.3 lm W -1和12.1%。与使用PO-01作为掺杂剂的控制设备相比,fac -Ir(SFXpy)3的器件在8至15