Ligand Mediated Luminescence Enhancement in Cyclometalated Rhodium(III) Complexes and Their Applications in Efficient Organic Light-Emitting Devices

Wei, Fangfang1; Lai, Shiu-Lun2,3; Zhao, Shunan1; Ng, Maggie2,3; Chan, Mei-Yee2,3; Yam, Vivian Wing-Wah2,3; Wong, Keith Man-Chung1

2019-08-14

10.1021/jacs.9b06308

Journal of the American Chemical Society   影响因子和分区

0002-7863

1520-5126

A series of luminescent cyclometalated rhodium(III) complexes have been designed and prepared. The improved luminescence property is realized by the judicious choice of a strong sigma-donor cyclometalating ligand with a lower-lying intraligand (IL) state that would raise the d-d excited state and introduction of a lower-lying emissive IL excited state. These complexes exhibit high thermal stability and considerable luminescence quantum yields as high as up to 0.65 in thin film, offering themselves as promising light-emitting materials in OLEDs. Respectable external quantum efficiencies of up to 12.2% and operational half-lifetimes of over 3000 h at 100 cd m(-2) have been achieved. This work demonstrates a breakthrough as the first example of an efficient rhodium(III) emitter for OLED application and opens up a new avenue for diversifying the development of OLED materials with rhodium metal being utilized as phosphors.

SCI ; EI ; IC

英语

NI期刊

第一 ; 通讯

Shenzhen Technology and Innovation Committee[JCYJ20170307110203786] ; Shenzhen Technology and Innovation Committee[JCYJ20170817110721105]

Chemistry

Chemistry, Multidisciplinary

WOS:000481563500055

AMER CHEMICAL SOC

20193607390417

Excited states ; Ligands ; Light ; Luminescence ; Organic light emitting diodes (OLED) ; Quantum efficiency

Semiconductor Devices and Integrated Circuits:714.2 ; Light/Optics:741.1 ; Physical Chemistry:801.4 ; Quantum Theory; Quantum Mechanics:931.4

Web of Science

1.Southern Univ Sci & Technol, Dept Chem, 1088 Xueyuan Blvd, Shenzhen 518055, Peoples R China
2.Univ Grants Comm, Areas Excellence Scheme, Inst Mol Funct Mat, Hong Kong, Peoples R China
3.Univ Hong Kong, Dept Chem, Pokfulam Rd, Hong Kong, Peoples R China

Wei, Fangfang,Lai, Shiu-Lun,Zhao, Shunan,et al. Ligand Mediated Luminescence Enhancement in Cyclometalated Rhodium(III) Complexes and Their Applications in Efficient Organic Light-Emitting Devices[J]. Journal of the American Chemical Society,2019,141(32):12863-12871.

Wei, Fangfang.,Lai, Shiu-Lun.,Zhao, Shunan.,Ng, Maggie.,Chan, Mei-Yee.,...&Wong, Keith Man-Chung.(2019).Ligand Mediated Luminescence Enhancement in Cyclometalated Rhodium(III) Complexes and Their Applications in Efficient Organic Light-Emitting Devices.Journal of the American Chemical Society,141(32),12863-12871.

Wei, Fangfang,et al."Ligand Mediated Luminescence Enhancement in Cyclometalated Rhodium(III) Complexes and Their Applications in Efficient Organic Light-Emitting Devices".Journal of the American Chemical Society 141.32(2019):12863-12871.