Near-infrared cyclometalated iridium(iii) complexes with bipolar features for efficient OLEDs via solution-processing

Autor:	Junting Yu, Hua Tan, Jiamin Cao, Weiguo Zhu, Fanyuan Meng, Chao Xu, Maoqiu Li
Rok vydání:	2020
Předmět:	Materials science Ligand Near-infrared spectroscopy Oxadiazole chemistry.chemical_element Electroluminescence Photochemistry Triphenylamine Inorganic Chemistry chemistry.chemical_compound chemistry OLED Quantum efficiency Iridium
Zdroj:	Dalton Transactions. 49:8785-8790
ISSN:	1477-9234 1477-9226
DOI:	10.1039/d0dt01415j
Popis:	A novel bipolar NIR iridium(iii) complex (CH3OTPA-BTz-Iq)2Ir(pic-OXD) with both a hole transporting (HT) triphenylamine (TPA) group and an electron transporting (ET) oxadiazole (OXD) group was designed and synthesized. It was observed that the incorporation of OXD and TPA into the ligand (CH3OTPA-BTz-Iq)2Ir(pic-OXD) improved the optophysical and electroluminescence performance in comparison with the parent iridium(iii) complex (CH3OTPA-BTz-Iq)2Irpic. In (CH3OTPA-BTz-Iq)2Ir(pic-OXD)-based OLEDs, a maximum external quantum efficiency (EQEmax) of 1.15% at 716 nm was obtained, which is much superior than that of the (CH3OTPA-BTz-Iq)2Irpic-based OLEDs (0.41% at 723 nm).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90a4fff7debcf34f3fb0d3086c422e47 https://doi.org/10.1039/d0dt01415j Zobrazit plný text záznamu