Highly Efficient Au(I) Alkynyl Emitters: Thermally Activated Delayed Fluorescence and Solution-Processed OLEDs

Yu, Fei-Hu1,2,6; Song, Xiu-Fang3; Liu, Guan-Hao1,2,6; Chang, Xiaoyong4; Li, Kai5; Wang, Ying1,2,6; Cui, Ganglong3; Chen, Yong1,2,6

2022-10-01

10.1002/chem.202202439

CHEMISTRY-A EUROPEAN JOURNAL   影响因子和分区

0947-6539

1521-3765

Two-coordinate donor-metal-acceptor type coinage metal complexes displaying efficient thermally activated delayed fluorescence (TADF) have been unveiled to be highly appealing candidates as emitters for organic light-emitting diodes (OLEDs). Herein a series of green to yellow TADF gold(I) complexes with alkynyl ligands has been developed for the first time. The complexes exhibit high photoluminescence quantum yields (PLQYs) of up to 0.76 in doped films (5 wt % in PMMA) at room temperature. The modifications of alkynyl ligands with electron-donating amino groups together with the use of electron-deficient carbene ligands induce ligand-to-ligand charge transfer excited states that give rise to TADF emission. Spectroscopic and density functional theory (DFT) calculations reveal the roles of electron-donating capability of the alkynyl ligand in tuning the excited-state properties. Solution-processed organic light-emitting diodes (OLEDs) using the present complexes as emitters achieve maximum external quantum efficiency (EQE) of up to 20 %.

gold alkynyl complex high emission efficiency high EQEs metal TADF solution-processed OLEDs

SCI

英语

其他

Natural Science Foundation of China["22170513","21971250","21801170"] ; Beijing Municipal Science & Technology Commission[Z211100007921020] ; Department of Science and Technology of Guangdong Province[2019QN01C617]

Chemistry

Chemistry, Multidisciplinary

WOS:000863953600001

WILEY-V C H VERLAG GMBH

CHEMISTRY

Web of Science

1.Chinese Acad Sci, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China
2.Chinese Acad Sci, CAS HKU Joint Lab New Mat, Tech Inst Phys & Chem, Beijing 100190, Peoples R China
3.Beijing Normal Univ, Key Lab Theoret & Computat Photochem, Minist Educ, Chem Coll, Beijing 100875, Peoples R China
4.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China
5.Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen 518055, Peoples R China
6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Yu, Fei-Hu,Song, Xiu-Fang,Liu, Guan-Hao,et al. Highly Efficient Au(I) Alkynyl Emitters: Thermally Activated Delayed Fluorescence and Solution-Processed OLEDs[J]. CHEMISTRY-A EUROPEAN JOURNAL,2022.

Yu, Fei-Hu.,Song, Xiu-Fang.,Liu, Guan-Hao.,Chang, Xiaoyong.,Li, Kai.,...&Chen, Yong.(2022).Highly Efficient Au(I) Alkynyl Emitters: Thermally Activated Delayed Fluorescence and Solution-Processed OLEDs.CHEMISTRY-A EUROPEAN JOURNAL.

Yu, Fei-Hu,et al."Highly Efficient Au(I) Alkynyl Emitters: Thermally Activated Delayed Fluorescence and Solution-Processed OLEDs".CHEMISTRY-A EUROPEAN JOURNAL (2022).