Near-Infrared Polymer Light-Emitting Diodes with High Efficiency and Low Efficiency Roll-off by Using Solution-Processed Iridium(III) Phosphors

被引：116

作者：

Cao, Xiaosong ^{[1
]}

Miao, Jingsheng ^{[2
]}

Zhu, Minrong ^{[1
]}

Zhong, Cheng ^{[1
]}

Yang, Chuluo ^{[1
]}

Wu, Hongbin ^{[2
]}

Qin, Jingui ^{[1
]}

Cao, Yong ^{[2
]}

机构：

[1] Wuhan Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Hubei Key Lab Organ & Polymer Optoelect Mat, Dept Chem, Wuhan 430072, Peoples R China

[2] S China Univ Technol, State Key Lab Luminescent Mat & Devices, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China

来源：

CHEMISTRY OF MATERIALS | 2015年 / 27卷 / 01期

基金：

中国国家自然科学基金;

关键词：

PHOTOPHYSICAL PROPERTIES; BIPOLAR HOST; COMPLEXES; RED; EMISSION; METAL; PERFORMANCE; DERIVATIVES; MORPHOLOGY; MOLECULE;

D O I：

10.1021/cm503361j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Two deep-red/near-infrared (NIR) iridium phosphors, (fldpqx)(2)Ir-(acac) and (thdpqx)(2)Ir(acac), were rationally designed and synthesized considering the emission wavelength, emission efficiency, and solubility. In optimized solution-processed phosphorescent polymer light-emitting devices, the (fldpqx)(2)Ir(acac)-based device achieved a maximum external quantum efficiency of 5.7% with the emission peak at 690 nm, while the (thdpqx)(2)Ir(acac)-based device achieved a maximum external quantum efficiency of 3.4% with the emission peak at 702 nm, which are comparable to the highest values ever reported for solution-processable NIR emitters. Moreover, these devices merely experienced low efficiency roll-off at high current densities.

引用

页码：96 / 104

页数：9

共 61 条

[1] Fluorene-Based Materials and Their Supramolecular Properties
Abbel, Robert
Schenning, Albertus P. H. J.
Meijer, E. W.
[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 2009, 47 (17) : 4215 - 4233
[2] Highly efficient phosphorescent emission from organic electroluminescent devices
Baldo, MA
O'Brien, DF
You, Y
Shoustikov, A
Sibley, S
Thompson, ME
Forrest, SR
[J]. NATURE, 1998, 395 (6698) : 151 - 154
[3] Theoretical and experimental investigations of the spectroscopic and photophysical properties of fluorene-phenylene and fluorene-thiophene derivatives:: Precursors of light-emitting polymers
Belletête, M
Beaupré, S
Bouchard, J
Blondin, P
Leclerc, M
Durocher, G
[J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2000, 104 (39): : 9118 - 9125
[4] New exchange-correlation density functionals: The role of the kinetic-energy density
Boese, AD
Handy, NC
[J]. JOURNAL OF CHEMICAL PHYSICS, 2002, 116 (22) : 9559 - 9569
[5] Highly efficient, near-infrared electrophosphorescence from a Pt-metalloporphyrin complex
Borek, Carsten
Hanson, Kenneth
Djurovich, Peter I.
Thompson, Mark E.
Aznavour, Kristen
Bau, Robert
Sun, Yiru
Forrest, Stephen R.
Brooks, Jason
Michalski, Lech
Brown, Julie
[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2007, 46 (07) : 1109 - 1112
[6] CHAIN-LENGTH DEPENDENCE OF ELECTRONIC AND ELECTROCHEMICAL PROPERTIES OF CONJUGATED SYSTEMS - POLYACETYLENE, POLYPHENYLENE, POLYTHIOPHENE, AND POLYPYRROLE
BREDAS, JL
SILBEY, R
BOUDREAUX, DS
CHANCE, RR
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1983, 105 (22) : 6555 - 6559
[7] Synthesis and characterization of phosphorescent cyclometalated platinum complexes
Brooks, J
Babayan, Y
Lamansky, S
Djurovich, PI
Tsyba, I
Bau, R
Thompson, ME
[J]. INORGANIC CHEMISTRY, 2002, 41 (12) : 3055 - 3066
[8] APPLICATION OF THE ENERGY-GAP LAW TO NONRADIATIVE, EXCITED-STATE DECAY
CASPAR, JV
MEYER, TJ
[J]. JOURNAL OF PHYSICAL CHEMISTRY, 1983, 87 (06) : 952 - 957
[9] Energy transfer and triplet exciton confinement in polymeric electrophosphorescent devices
Chen, FC
Chang, SC
He, GF
Pyo, S
Yang, Y
Kurotaki, M
Kido, J
[J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 2003, 41 (21) : 2681 - 2690
[10] High-performance polymer light-emitting diodes doped with a red phosphorescent iridium complex
Chen, FC
Yang, Y
Thompson, ME
Kido, J
[J]. APPLIED PHYSICS LETTERS, 2002, 80 (13) : 2308 - 2310

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