Design of Blue Thermally Activated Delayed Fluorescent Emitter with Efficient Exciton Gathering Property for High-Performance Fully Solution-Processed Hybrid White OLEDs

被引:36
作者
Ban, Xinxin [1 ]
Liu, Yan [1 ]
Pan, Jie [1 ]
Chen, Feng [1 ]
Zhu, Aiyun [1 ]
Jiang, Wei [2 ]
Sun, Yueming [2 ]
Dong, Yajie [3 ]
机构
[1] Jiangsu Ocean Univ, Sch Chem Engn, Jiangsu Key Lab Funct Control Technol Adv Mat, Lianyungang 222005, Jiangsu, Peoples R China
[2] Southeast Univ, Sch Chem & Chem Engn, Nanjing 211189, Jiangsu, Peoples R China
[3] Univ Cent Florida, Nanosci Technol Ctr, Orlando, FL 32826 USA
基金
中国国家自然科学基金;
关键词
TADF; blue; hybrid white; fully solution-process; organic light-emitting diodes; EXTERNAL QUANTUM EFFICIENCY; DIODES; LAYER; EMISSION; POLYMERS; HOST; DEVICES;
D O I
10.1021/acsami.9b20903
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The blue thermally activated delay fluorescence (TADF) emitters are highly attractive in the fields of constructing hybrid white organic light-emitting diodes (WOLEDs) due to its high efficiency and color stability. However, few blue TADF emitters can withstand sequential orthogonal solvents, making it impossible to fabricate the fully solution-processed hybrid WOLEDs. Here, two TADF materials, PCz-4CzCN and TPA-4CzCN, were designed and synthesized by equipping the emissive core with non-conjugated bulky units, which can effectively enhance the solvent resistance ability without disturbing the TADF feature. The photophysical investigation indicates that phenylcarbazole unit can efficiently block the electromer formation to enhance the energy transfer and Accordingly, the blue OLEDs of PCz-4CzCN shows higher external quantum efficiency (EQE) of 22.6%, which is the best performance recorded among the fully solution-processed blue OLEDs. Upon further doping, the yellow phosphor PO-01, the fully solution-processed TADF-phosphor (T-P) hybrid WOLEDs was successfully obtained with high performance for the first time. Thanks to the efficient exciplex formation, the turn-on voltage of the white device is only 2.8 V, and the maximum brightness and power efficiency are as high as 53 300 cd m(-2) and 38.5 lm W-1, respectively, which are even higher than the previous reported T-P hybrid WOLEDs with a vacuum-deposited electron transfer layer.
引用
收藏
页码:1190 / 1200
页数:11
相关论文
共 50 条
[1]   Impact of Interface Mixing on the Performance of Solution Processed Organic Light Emitting Diodes-Impedance and Ultraviolet Photoelectron Spectroscopy Study [J].
Ahn, Dong A. ;
Lee, Seungjun ;
Chung, Jaegwan ;
Park, Yongsup ;
Suh, Min Chul .
ACS APPLIED MATERIALS & INTERFACES, 2017, 9 (27) :22748-22756
[2]   Solution-processed multilayer small-molecule light-emitting devices with high-efficiency white-light emission [J].
Aizawa, Naoya ;
Pu, Yong-Jin ;
Watanabe, Michitake ;
Chiba, Takayuki ;
Ideta, Kazushige ;
Toyota, Naoki ;
Igarashi, Masahiro ;
Suzuri, Yoshiyuki ;
Sasabe, Hisahiro ;
Kido, Junji .
NATURE COMMUNICATIONS, 2014, 5
[3]   A dendrimer emitter doped in a dendrimer host: efficient thermally activated delayed fluorescence OLEDs with fully-solution processed organic-layers [J].
Albrecht, K. ;
Matsuoka, K. ;
Fujita, K. ;
Yamamoto, K. .
MATERIALS CHEMISTRY FRONTIERS, 2018, 2 (06) :1097-1103
[4]   Thermally activated delayed fluorescence OLEDs with fully solution processed organic layers exhibiting nearly 10% external quantum efficiency [J].
Albrecht, Ken ;
Matsuoka, Kenichi ;
Yokoyama, Daisuke ;
Sakai, Yoshiya ;
Nakayama, Akira ;
Fujita, Katsuhiko ;
Yamamoto, Kimihisa .
CHEMICAL COMMUNICATIONS, 2017, 53 (16) :2439-2442
[5]   All-solution-processed multilayer polymer/dendrimer light emitting diodes [J].
Auer-Berger, Manuel ;
Trattnig, Roman ;
Qin, Tianshi ;
Schlesinger, Raphael ;
Nardi, Marco V. ;
Ligorio, Giovanni ;
Christodoulou, Christos ;
Koch, Norbert ;
Baumgarten, Martin ;
Muellen, Klaus ;
List-Kratochvil, Emil J. W. .
ORGANIC ELECTRONICS, 2016, 35 :164-170
[6]   Efficient Bipolar Blue AIEgens for High-Performance Nondoped Blue OLEDs and Hybrid White OLEDs [J].
Chen, Bin ;
Liu, Baiquan ;
Zeng, Jiajie ;
Nie, Han ;
Xiong, Yi ;
Zou, Jianhua ;
Ning, Honglong ;
Wang, Zhiming ;
Zhao, Zujin ;
Tang, Ben Zhong .
ADVANCED FUNCTIONAL MATERIALS, 2018, 28 (40)
[7]   Combining Charge-Transfer Pathways to Achieve Unique Thermally Activated Delayed Fluorescence Emitters for High-Performance Solution-Processed, Non-doped Blue OLEDs [J].
Chen, Xu-Lin ;
Jia, Ji-Hui ;
Yu, Rongmin ;
Liao, Jian-Zhen ;
Yang, Ming-Xue ;
Lu, Can-Zhong .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2017, 56 (47) :15006-15009
[8]   Molecular Engineering of High Efficiency and Long Lifetime Blue Thermally Activated Delayed Fluorescent Emitters for Vacuum and Solution Processed Organic Light-Emitting Diodes [J].
Cho, Yong Joo ;
Jeon, Sang Kyu ;
Lee, Jun Yeob .
ADVANCED OPTICAL MATERIALS, 2016, 4 (05) :688-693
[9]   20% External Quantum Efficiency in Solution-Processed Blue Thermally Activated Delayed Fluorescent Devices [J].
Cho, Yong Joo ;
Chin, Byung Doo ;
Jeon, Sang Kyu ;
Lee, Jun Yeob .
ADVANCED FUNCTIONAL MATERIALS, 2015, 25 (43) :6786-6792
[10]   All-Solution-Processed Organic Light-Emitting Diodes Based on Photostable Photo-cross-linkable Fluorescent Small Molecules [J].
Derue, Lionel ;
Olivier, Simon ;
Tondelier, Denis ;
Maindron, Tony ;
Geffroy, Bernard ;
Ishow, Elena .
ACS APPLIED MATERIALS & INTERFACES, 2016, 8 (25) :16207-16217