Articles


Document Type
Journal article (JA)
Title
Efficient TADF-OLEDs with ultra-soluble Copper(I) halide complexes containing non-symmetrically substituted bidentate phosphine and PPh3 ligands
Author
Guo, Bang-Ke (1); Yang, Fei (2); Wang, Ya-Qi (1); Wei, Qiong (1); Liu, Li (1); Zhong, Xin-Xin (1); Wang, Lei (2); Gong, Jian-Kang (1); Li, Fa-Bao (1); Wong, Wai-Yeung (3); Alamry, Khalid A. (4); Zhao, Yi (5)
作者单位
(1) Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University, Wuhan; 430062, China (2) Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan; 430074, China (3) Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China (4) Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah; 21589, Saudi Arabia (5) State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen; 361005, China
RPAddress
Hubei Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Sch Chem & Chem Engn, Minist Educ,Key Lab Synth & Applicat Organ Funct, Wuhan 430062, Peoples R China.; Wang, L (reprint author), Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China.; Wong, WY (reprint author), Hong Kong Polytech Univ, Dept Appl Biol & Chem Technol, Hung Hom, Hong Kong, Peoples R China.
Email
ResearchID
ORCID
Journal
Journal of Luminescence
Publisher
Elsevier B.V.
ISSN
0022-2313
Published
2020-04, 220 ():-.
JCR
ImpactFactor
ISBN
Fund_Code
National Natural Science Foundation of China, ChinaNational Natural Science Foundation of China [21671061]; Wuhan Municipal Science and Technology Bureau, China [2019010701011414]
会议名称
会议地点
会议开始日期
会议结束日期
HYLWLB
HYJB
Keywords
Bromine; Charge transfer; Chlorine; Efficiency; Fluorescence; Ligands; Metal halides; Organic light emitting diodes (OLED); Phosphorus compounds; Quantum efficiency; Synthesis (chemical); Thiophene
Abstract
High efficiency copper(I) halide complexes containing rigid diphosphine ligand have attracted much attention. However, rigid bidentate phosphine ligands were rarely reported so far and limited to structural symmetric diphosphines. Here, a series of four-coordinate mononuclear copper(I) halide complexes containing non-symmetrically substituted bidentate phosphine and PPh3 Ligands, CuX(dpts)(PPh3) [dpts = 2-trimethylsilyl-3,4-bis(diphenylphosphine)thiophene, X = I (1), Br (2), Cl (3)] and in comparison to CuX(dppt)(PPh3) [dppt = 3,4-bis(diphenylphosphino)thiophene, X = I (4), Br (5), Cl (6)], were synthesized, and their molecular structures and photophysical properties were investigated. The introduction of trimethylsilyl group into diphosphine ligand, not only greatly improves the solubility of the complexes, but also quantum efficiency, and fine-tunes the emission color as well. These complexes exhibit intense bluegreen to yellowish green emissions in powder state at room temperature and have peak wavelengths at 485–535 nm with microsecond lifetimes (τ = 4.8–48.9 μs, Φ = 0.03–0.52). The emission of the complexes 1–6 mainly originates from MLCT (metal to ligand charge transfer), XLCT (halide to ligand charge transfer) and intraligand transitions. Solution-processed, nondoped and doped devices of complex 2 exhibit yellow green emission with CIE(x,y) of (0.43, 0.51). The nondoped device gives a maximum external quantum efficiency (EQE) of 7.74% and a maximum luminance of 234 cd/m2. These promising results open the door to solution-processed, efficient TADF (thermally activated delayed fluorescence) OLED (organic light-emitting diode) devices with ultra-soluble and abundant copper emitters. ? 2019 Elsevier B.V.
WOS Categories
Optics
Accession Number
WOS:000512899700015
EI收录号
20195207895830
DOI
10.1016/j.jlumin.2019.116963
ESI_Type
PHYSICS
Collection
SCIE, EI

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