Triplet-Polaron-Interaction-Induced Upconversion from Triplet to Singlet: a Possible Way to Obtain Highly Efficient OLEDs

被引：148
作者：
Obolda, Ablikim [1 ]
Peng, Qiming [1 ]
He, Chuanyou [1 ]
Zhang, Tian [2 ]
Ren, Jiajun [2 ]
Ma, Hongwei [1 ]
Shuai, Zhigang [2 ]
Li, Feng [1 ]
机构：
[1] Jilin Univ, Coll Chem, State Key Lab Supramol Struct & Mat, Qianjin Ave, Changchun 130012, Peoples R China
[2] Tsinghua Univ, Dept Chem, Key Lab Organ Optoelect & Mol Engn, Beijing 100084, Peoples R China
来源：
ADVANCED MATERIALS | 2016年 / 28卷 / 23期
基金：
中国国家自然科学基金;
关键词：
LIGHT-EMITTING-DIODES; DELAYED FLUORESCENCE; ELECTROLUMINESCENCE; EMISSION; EXCITONS; DEVICES; ANNIHILATION; CARBAZOLE; STABILITY; CORE;
D O I：
10.1002/adma.201504601
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Two D-A-type molecules, 4-N-[4-(9-phenylcarbazole)]-3,5-bis(4-diphenyl amine)phenyl-4H -1,2,4-triazole and 4,4'-(9-(4-(1-phenyl-1H-phenanthro[9,10-d]-imidazol-2-yl)phenyl)-9H-carbazole-3,6-diyl)bis-(N,N-diphenylaniline), are designed and synthesized. Organic light-emitting diodes based on them exhibit deep-blue emission and the singlet formation ratios are higher than the simple spin-statistics of 25%. A triplet-polaron-interaction-induced upconversion from triplet to singlet through a one-electron transfer mechanism is proposed, and is proven by magnetocurrent measurement and quantum-chemistry computation.
引用
收藏
页码：4740 / 4746
页数：7
相关论文
共 48 条
[1]   High-efficiency organic electrophosphorescent devices with tris(2-phenylpyridine)iridium doped into electron-transporting materials [J].
Adachi, C ;
Baldo, MA ;
Forrest, SR ;
Thompson, ME .
APPLIED PHYSICS LETTERS, 2000, 77 (06) :904-906
[2]   Highly efficient phosphorescent emission from organic electroluminescent devices [J].
Baldo, MA ;
O'Brien, DF ;
You, Y ;
Shoustikov, A ;
Sibley, S ;
Thompson, ME ;
Forrest, SR .
NATURE, 1998, 395 (6698) :151-154
[3]   LIGHT-EMITTING-DIODES BASED ON CONJUGATED POLYMERS [J].
BURROUGHES, JH ;
BRADLEY, DDC ;
BROWN, AR ;
MARKS, RN ;
MACKAY, K ;
FRIEND, RH ;
BURN, PL ;
HOLMES, AB .
NATURE, 1990, 347 (6293) :539-541
[4]   Improved quantum efficiency for electroluminescence in semiconducting polymers [J].
Cao, Y ;
Parker, ID ;
Yu, G ;
Zhang, C ;
Heeger, AJ .
NATURE, 1999, 397 (6718) :414-417
[5]   Novel Bipolar Phenanthroimidazole Derivative Design for a Nondoped Deep-Blue Emitter with High Singlet Exciton Yields [J].
Chen, Miao ;
Yuan, Yi ;
Zheng, Ji ;
Chen, Wen-Cheng ;
Shi, Long-Ji ;
Zhu, Ze-Lin ;
Lu, Feng ;
Tong, Qing-Xiao ;
Yang, Qing-Dan ;
Ye, Jun ;
Chan, Mei-Yee ;
Lee, Chun-Sing .
ADVANCED OPTICAL MATERIALS, 2015, 3 (09) :1215-1219
[6]   E-Type Delayed Fluorescence of a Phosphine-Supported Cu2(μ-NAr2)2 Diamond Core: Harvesting Singlet and Triplet Excitons in OLEDs [J].
Deaton, Joseph C. ;
Switalski, Steven C. ;
Kondakov, Denis Y. ;
Young, Ralph H. ;
Pawlik, Thomas D. ;
Giesen, David J. ;
Harkins, Seth B. ;
Miller, Alex J. M. ;
Mickenberg, Seth F. ;
Peters, Jonas C. .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2010, 132 (27) :9499-9508
[7]   Magnetoresistance and efficiency measurements of Alq3-based OLEDs [J].
Desai, Pratik ;
Shakya, P. ;
Kreouzis, T. ;
Gillin, W. P. ;
Morley, N. A. ;
Gibbs, M. R. J. .
PHYSICAL REVIEW B, 2007, 75 (09)
[8]   Thermally Activated Delayed Fluorescence from Sn4+-Porphyrin Complexes and Their Application to Organic Light-Emitting Diodes - A Novel Mechanism for Electroluminescence [J].
Endo, Ayataka ;
Ogasawara, Mai ;
Takahashi, Atsushi ;
Yokoyama, Daisuke ;
Kato, Yoshimine ;
Adachi, Chihaya .
ADVANCED MATERIALS, 2009, 21 (47) :4802-+
[9]   MAGNETIC FIELD EFFECT ON TRIPLET EXCITON QUENCHING IN ORGANIC CRYSTALS [J].
ERN, V ;
MERRIFIELD, RE .
PHYSICAL REVIEW LETTERS, 1968, 21 (09) :609-+
[10]  
Frisch M.J., 2016, Gaussian, V16
12345