Highly Emissive Red Heterobimetallic IrIII/MI (MI = CuI and AuI) Complexes for Efficient Light-Emitting Electrochemical Cells

Anna Bonfiglio, Pei Wan Hsiao, Yin Chen, Christophe Gourlaouen, Quentin Marchand, Vincent César, Stéphane Bellemin-Laponnaz, Yun Xin Wang, Chin Wei Lu, Chantal Daniel, Federico Polo, Hai Ching Su*, Matteo Mauro*

*此作品的通信作者

研究成果: Article同行評審

15 引文 斯高帕斯(Scopus)

摘要

A class of four bright heterobimetallic emitters is presented, which features both a chromophoric [Ir(C^N)2] center and a positively charged, linear bis-NHC M(I) ancillary moiety bridged through a Janus-type ligand. An in-depth investigation of their optical and electrochemical properties is also reported, which are further elucidated by means of time-dependent density functional theory including spin-orbital coupling effects. All complexes display efficient, vibrant red phosphorescence with a higher quantum yield and a faster radiative rate constant compared to the mononuclear parental complexes. This effect was elucidated in terms of better S-T excited-state mixing as well as increased rigidity favored by the multimetallic architecture. Finally, their electroluminescence performances are investigated by using these bimetallic complexes as electroactive materials in light-emitting electrochemical cells, achieving external quantum efficiency values up to 6% and resulting in among the most efficient ones for red emitters. This result is also attributable to the charge-neutral nature of an emitting Ir complex bearing a charged, wider energy gap, metal complex as an ancillary moiety.

原文English
頁(從 - 到)1756-1769
頁數14
期刊Chemistry of Materials
34
發行號4
DOIs
出版狀態Published - 22 2月 2022

指紋

深入研究「Highly Emissive Red Heterobimetallic IrIII/MI (MI = CuI and AuI) Complexes for Efficient Light-Emitting Electrochemical Cells」主題。共同形成了獨特的指紋。

引用此