Highly Stable and Efficient Light-Emitting Electrochemical Cells Based on Cationic Iridium Complexes Bearing Arylazole Ancillary Ligands
作者:Marta Martínez-Alonso、Jesús Cerdá、Cristina Momblona、Antonio Pertegás、José M. Junquera-Hernández、Aránzazu Heras、Ana M. Rodríguez、Gustavo Espino、Henk Bolink、Enrique Ortí
DOI:10.1021/acs.inorgchem.7b01167
日期:2017.9.5
nature of the emitting triplet state. Whereas the benzimidazole unit stabilizes the LUMO and gives rise to a 3MLCT/3LLCT emitting triplet in [2][PF6] and [3][PF6], the presence of the thiazolyl ring produces the opposite effect in [4][PF6] and [5][PF6] and the emitting state has a predominant 3LC character. Complexes with 3MLCT/3LLCT emitting triplets give rise to LEC devices with luminance values
一系列双-环金属化铱(III)通式[的Ir(ppy)配合物2(N ∧ N)] [PF 6 ](PPY - = 2- phenylpyridinate; N ∧ N = 2-(1- ħ -咪唑2-基)吡啶(1),2-(2-吡啶基)苯并咪唑(2),1-甲基-2-吡啶-2-基-1 H-苯并咪唑(3),2-(4'-噻唑基)苯并咪唑(4),报道了1-甲基-2-(4'-噻唑基)苯并咪唑(5)),并且研究了它们在发光电化学电池(LEC)装置中作为电致发光材料的用途。[ 2 ] [PF 6 ]和[ 3] [PF 6 ]是在乙腈溶液中在590 nm附近具有强烈的非结构发射的橙色发射体。[ 1 ] [PF 6 ],[ 4 ] [PF 6 ]和[ 5 ] [PF 6 ]是绿色弱发射体,其结构化发射带的峰值在500 nm左右。不同的光物理性质归因于辅助配体的化学结构对发光三重态的性质的影响。苯并咪唑单元可稳定LUMO,并在[