A Pure Blue Phosphorescent Organic Light-Emitting Diode with an External Quantum Efficiency of Over 30% by Using a Tandem Device Architecture

Chen, Zhao1; Tian, Naifan1; Tao, Peng2,3; Chen, Shuming4; Ma, Dongge5; Wang, Lixiang6; Wong, Wai-Yeung2,3,7

2022-09-01

10.1002/admi.202200932

Advanced Materials Interfaces   Impact Factor & Quartile

2196-7350

Achieving efficient deep blue phosphorescent organic light-emitting diodes (PHOLEDs) is one of the most difficult and challenging targets nowadays, especially when the Commission Internationale de l'Eclairage (CIE) chromaticity coordinates of y values are smaller than 0.1. Herein, tandem device architectures are fabricated by using an iridium(III) carbene phosphor. In the tandem structures, two electroluminescent units are stacked and connected by a charge generation layer (CGL) which consists of dipyrazino[2,3-f:2 ',3 '-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (HATCN) and 4,4 '-(cyclohexane-1,1-diyl)bis(N,N-di-p-tolylaniline) (TAPC). Meanwhile, 4,6-bis(3,5-di(pyridine-3-yl)phenyl)-2-methylpyrimidine (B3PYMPM) and diphenyl-4-triphenylsilylphenyl phosphine oxide (TSPO1) are used as electron transport layers. The best device gives an external quantum efficiency of 32.3% with the CIE coordinates of (0.15, 0.10), which is among the most efficient blue PHOLEDs made by iridium(III) phosphors. The pure blue emission and high performance are mainly attributed to the efficient and balanced recombination of charge carriers in the two emissive layers, which successfully suppresses the exciplex formation and efficiently confines the triplet excitons.

balanced recombination blue organic light-emitting diodes high-efficiency pure blue emission tandem device architecture

SCI ; EI

English

Corresponding

National Natural Science Foundation of China["21901190","51873176"] ; Key-Area Research and Development Program of Guangdong Province[2020B010174004] ; Key Laboratory of Optoelectronic materials and Applications in Guangdong Higher Education[2017KSYS011] ; Hong Kong Research Grants Council[PolyU 15305320] ; Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices[2019B121205001] ; ITC Guangdong-Hong Kong Technology Cooperation Funding Scheme (TCFS)[GHP/038/19GD] ; Endowed Professorship in Energy from Miss Clarea Au[847S] ; Guangzhou Science & Technology plan project[2020A0505140002]

Chemistry ; Materials Science

Chemistry, Multidisciplinary ; Materials Science, Multidisciplinary

WOS:000849042500001

WILEY

20223712712315

Architecture ; Electron transport properties ; Iridium compounds ; Organic light emitting diodes (OLED) ; Phosphors ; Phosphorus compounds ; Quantum efficiency ; Supercomputers

Buildings and Towers:402 ; Semiconductor Devices and Integrated Circuits:714.2 ; Digital Computers and Systems:722.4 ; Light/Optics:741.1 ; Chemical Products Generally:804 ; Quantum Theory; Quantum Mechanics:931.4

Web of Science

1.Wuyi Univ, Sch Appl Phys & Mat, Jiangmen 529020, Peoples R China
2.Hong Kong Polytech Univ PolyU, Dept Appl Biol & Chem Technol, Res Inst Smart Energy, Hung Hom, Hong Kong, Peoples R China
3.Hong Kong Polytech Univ PolyU, CAS Croucher Funding Scheme Joint Labs, Hung Hom, Hong Kong, Peoples R China
4.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
5.South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 5106640, Peoples R China
6.Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Changchun Inst Appl Chem, Changchun 130022, Peoples R China
7.PolyU Shenzhen Res Inst, Shenzhen 518057, Peoples R China

Chen, Zhao,Tian, Naifan,Tao, Peng,et al. A Pure Blue Phosphorescent Organic Light-Emitting Diode with an External Quantum Efficiency of Over 30% by Using a Tandem Device Architecture[J]. Advanced Materials Interfaces,2022.

Chen, Zhao.,Tian, Naifan.,Tao, Peng.,Chen, Shuming.,Ma, Dongge.,...&Wong, Wai-Yeung.(2022).A Pure Blue Phosphorescent Organic Light-Emitting Diode with an External Quantum Efficiency of Over 30% by Using a Tandem Device Architecture.Advanced Materials Interfaces.

Chen, Zhao,et al."A Pure Blue Phosphorescent Organic Light-Emitting Diode with an External Quantum Efficiency of Over 30% by Using a Tandem Device Architecture".Advanced Materials Interfaces (2022).