Au(I)-TADF Emitters for High Efficiency Full-Color Vacuum-Deposited OLEDs and TADF-Sensitized Fluorescent OLEDs with Ultrahigh Brightness and Prolonged Operational Lifetime

Tang, Rui1,2; Xu, Shuo1; Du, Lili1,3; Hung, Faan-Fung1,4; Lam, Tsz-Lung1,4; Cheng, Gang1,4,5; Low, Kam-Hung1; Wan, Qingyun1; Wu, Siping1; Chen, Yong6,7; Che, Chi-Ming1,4,5

2023-07-01

10.1002/adom.202300950

ADVANCED OPTICAL MATERIALS   影响因子和分区

2195-1071

2195-1071

Herein a class of structurally simple and operationally stable Au(I)-TADF (TADF = thermally activated delayed fluorescence) materials, based on a carbene-metal-amide (CMA) molecular scaffold comprised of sterically bulky N-heterocyclic carbene ligands with N-heterocyclic & pi;-annulation, are reported. These CMA(Au) emitters are thermally stable, adopt coplanar or orthogonal geometry between the carbene and amide ligands, and show strong blue to deep red TADF emissions (466-666 nm) from thermally equilibrated singlet ligand-to-ligand-charge-transfer excited states with emission quantum yields of 0.63-0.99 and radiative decay rate constants of 0.68-3.2 x 10(6) s(-1) in thin film samples at room temperature. The effects of increasing & pi;-extension and orthogonal molecular geometry are similarly manifested in the reduction of both singlet-triplet energy gap and S-1 transition dipole moment. The vacuum-deposited Au(I) organic light-emitting diodes (OLEDs) display superior electroluminescence characterized by ultrahigh brightness up to 300 000 cd m(-2) and external quantum efficiencies (EQEs) up to 26.2% with roll-offs down to 2.6% at 1000 cd m(-2) alongside record-setting device lifetimes (LT95) up to 2082 h. Ultrapure-green TADF-sensitized fluorescent OLEDs employing the CMA(Au) emitter as sensitizer and a multiresonance terminal emitter achieve EQEs of up to 25.3%.

carbene-metal-amide gold(I) emitters N-heterocyclic carbene organic light-emitting diodes thermally activated delayed fluorescence

SCI ; EI

英语

其他

Guangdong Major Project of Basic and Applied Basic Research[2019B030302009] ; Innovation and Technology Fund[PRP/071/19FX] ; Shunde Science and Technology Bureau[2030218000158] ; Science Technology and Innovation Commission of Shenzhen Municipality["JCYJ20180508162429786","JCYJ20200109150414471"] ; Beijing Municipal Science amp; Technology Commission[Z 211100007921020]

Materials Science ; Optics

Materials Science, Multidisciplinary ; Optics

WOS:001028313500001

WILEY-V C H VERLAG GMBH

20232914407415

Amides ; Charge transfer ; Display devices ; Electroluminescence ; Geometry ; Gold compounds ; Ligands ; Luminance ; Organic light emitting diodes (OLED) ; Quantum efficiency ; Rate constants ; Scaffolds ; Temperature

Construction Equipment:405.1 ; Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Computer Peripheral Equipment:722.2 ; Light, Optics and Optical Devices:741 ; Light/Optics:741.1 ; Physical Chemistry:801.4 ; Chemical Reactions:802.2 ; Organic Compounds:804.1 ; Mathematics:921 ; Quantum Theory; Quantum Mechanics:931.4

2-s2.0-85164824873

Web of Science

1.Univ Hong Kong, Dept Chem, State Key Lab Synthet Chem, CAS HKU Joint Lab New Mat, Pokfulam Rd, Hong Kong, Peoples R China
2.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Guangdong, Peoples R China
3.Jiangsu Univ, Sch Life Sci, Zhenjiang 212013, Zhejiang, Peoples R China
4.Hong Kong Quantum AI Lab Ltd, Pak Shek Kok, Units 909-915,Bldg 17 W,17 Sci Pk West Ave,Hong Ko, Hong Kong, Peoples R China
5.HKU Shenzhen Inst Res & Innovat, Shenzhen 518057, Guangdong, Peoples R China
6.Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China
7.Chinese Acad Sci, Inst Phys & Chem, CAS HKU Joint Lab New Mat Tech, Beijing 100190, Peoples R China

Tang, Rui,Xu, Shuo,Du, Lili,et al. Au(I)-TADF Emitters for High Efficiency Full-Color Vacuum-Deposited OLEDs and TADF-Sensitized Fluorescent OLEDs with Ultrahigh Brightness and Prolonged Operational Lifetime[J]. ADVANCED OPTICAL MATERIALS,2023,11(23).

Tang, Rui.,Xu, Shuo.,Du, Lili.,Hung, Faan-Fung.,Lam, Tsz-Lung.,...&Che, Chi-Ming.(2023).Au(I)-TADF Emitters for High Efficiency Full-Color Vacuum-Deposited OLEDs and TADF-Sensitized Fluorescent OLEDs with Ultrahigh Brightness and Prolonged Operational Lifetime.ADVANCED OPTICAL MATERIALS,11(23).

Tang, Rui,et al."Au(I)-TADF Emitters for High Efficiency Full-Color Vacuum-Deposited OLEDs and TADF-Sensitized Fluorescent OLEDs with Ultrahigh Brightness and Prolonged Operational Lifetime".ADVANCED OPTICAL MATERIALS 11.23(2023).