Highly Efficient Deep-Blue Phosphorescent OLEDs Based on a Trimethylsilyl-Substituted Tetradentate Pt(II) Complex

被引:41
作者
Park, Hea Jung [1 ,2 ]
Jang, Jee-Hun [3 ]
Lee, Jeong-Hwan [3 ]
Hwang, Do-Hoon [1 ,2 ]
机构
[1] Pusan Natl Univ, Dept Chem, Busan 46241, South Korea
[2] Pusan Natl Univ, Chem Inst Funct Mat, Busal 46241, South Korea
[3] Inha Univ, Dept Mat Sci & Engn, 3D Convergence Ctr, Incheon 22212, South Korea
基金
新加坡国家研究基金会;
关键词
platinum(II) complexes; deep-blue phosphorescence; OLEDs; trimethylsilyl-substituents; high color purities; LIGHT-EMITTING-DIODES; CYCLOMETALATED PLATINUM(II) COMPLEXES; PHOTOPHYSICAL PROPERTIES; IR(III) COMPLEXES; LIGANDS;
D O I
10.1021/acsami.2c06891
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Compared to Ir(III) complexes with octahedral geometries, Pt(II) complexes with square planar geometries show superior optical properties because their flat shapes lead to an orientation that enhances the outcoupling of organic light-emitting diodes (OLEDs). However, the flat shapes of Pt(II) complexes typically induce a bathochromic shift, limiting their application in high-performance deep-blue phosphorescent OLEDs with high color purity. In this study, bulky trimethylsilyl (TMS)-substituted blue phosphorescent Pt(II) complex (PtON7-TMS) is successfully synthesized to improve color purity. The TMS substituent containing Si atom effectively suppresses intermolecular inter-action and aggregation even when the complex concentration in the film state is higher than 30 wt %. As a result, the PtON7-TMS-based OLEDs exhibit a maximum external quantum efficiency of 21.4%, along with a pure-blue color of CIE (0.14, 0.09) at 20 wt % doping concentration and a full-width at half maximum of 30 nm. The pure blue color is maintained at a higher doping concentration (>30 wt %).
引用
收藏
页码:34901 / 34908
页数:8
相关论文
共 57 条
  • [1] Iridium(III) complexes adopting 1,2-diphenyl-1H-benzoimidazole ligands for highly efficient organic light-emitting diodes with low efficiency roll-off and non-doped feature
    Cao, Hongtao
    Sun, Haizhu
    Yin, Yongming
    Wen, Xuemei
    Shan, Guogang
    Su, Zhongmin
    Zhong, Ronglin
    Xie, Wenfa
    Li, Peng
    Zhu, Dongxia
    [J]. JOURNAL OF MATERIALS CHEMISTRY C, 2014, 2 (12) : 2150 - 2159
  • [2] Recent advances in phosphorescent platinum complexes for organic light-emitting diodes
    Cebrian, Cristina
    Mauro, Matteo
    [J]. BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY, 2018, 14 : 1459 - 1481
  • [3] Luminescent Neutral Platinum Complexes Bearing an Asymmetric N∧N∧N Ligand for High-Performance Solution-Processed OLEDs
    Cebrian, Cristina
    Mauro, Matteo
    Kourkoulos, Dimitrios
    Mercandelli, Pierluigi
    Hertel, Dirk
    Meerholz, Klaus
    Strassert, Cristian A.
    De Cola, Luisa
    [J]. ADVANCED MATERIALS, 2013, 25 (03) : 437 - 442
  • [4] Platinum(ii) binuclear complexes: molecular structures, photophysical properties, and applications
    Chaaban, Maya
    Zhou, Chenkun
    Lin, Haoran
    Chyi, Brandon
    Ma, Biwu
    [J]. JOURNAL OF MATERIALS CHEMISTRY C, 2019, 7 (20) : 5910 - 5924
  • [5] Excited-State Processes of Cyclometalated Platinum(II) Charge-Transfer Dimers Bridged by Hydroxypyridines
    Chakraborty, Arnab
    Yarnell, James E.
    Sommer, Roger D.
    Roy, Subhangi
    Castellano, Felix N.
    [J]. INORGANIC CHEMISTRY, 2018, 57 (03) : 1298 - 1310
  • [6] High-Efficiency Solution-Processed Organic Light-Emitting Diodes with Tetradentate Platinum(II) Emitters
    Cheng, Gang
    Kwak, Yoonhyun
    To, Wai-Pong
    Lam, Tsz-Lung
    Tong, Glenna So Ming
    Sit, Man-Ki
    Gong, Shaolong
    Choi, Byoungki
    Choi, Wha Il
    Yang, Chuluo
    Che, Chi-Ming
    [J]. ACS APPLIED MATERIALS & INTERFACES, 2019, 11 (48) : 45161 - 45170
  • [7] Over 30 000 h Device Lifetime in Deep Blue Organic Light-Emitting Diodes with y Color Coordinate of 0.086 and Current Efficiency of 37.0 cd A-1
    Chung, Won Jae
    Lee, Kyung Hyung
    Jung, Mina
    Lee, Kang Mun
    Park, Ho Cheol
    Eum, Min-Sik
    Lee, Jun Yeob
    [J]. ADVANCED OPTICAL MATERIALS, 2021, 9 (13)
  • [8] Blue-emitting heteroleptic Ir(III) phosphors with functional 2,3′-bipyridine or 2-(pyrimidin-5-yl)-pyridine cyclometalates
    Duan, Tainan
    Chang, Ting-Kuang
    Chi, Yun
    Wang, Jin-Yun
    Chen, Zhong-Ning
    Hung, Wen-Yi
    Chen, Chang-Hsuan
    Lee, Gene-Hsiang
    [J]. DALTON TRANSACTIONS, 2015, 44 (33) : 14613 - 14624
  • [9] Efficient "Pure" Blue OLEDs Employing Tetradentate Pt Complexes with a Narrow Spectral Bandwidth
    Fleetham, Tyler
    Li, Guijie
    Wen, Lele
    Li, Jian
    [J]. ADVANCED MATERIALS, 2014, 26 (41) : 7116 - +
  • [10] Tetradentate Pt(II) Complexes with 6-Membered Chelate Rings: A New Route for Stable and Efficient Blue Organic Light Emitting Diodes
    Fleetham, Tyler B.
    Huang, Liang
    Klimes, Kody
    Brooks, Jason
    Li, Jian
    [J]. CHEMISTRY OF MATERIALS, 2016, 28 (10) : 3276 - 3282