Solution-processed blue phosphorescent OLEDs with carbazole-based polymeric host materials

被引：34

作者：

Dumur, Frederic ^{[1
,2
]}

Beouch, Layla ^{[3
]}

Peralta, Sebastien ^{[3
]}

Wantz, Guillaume ^{[2
,4
]}

Goubard, Fabrice ^{[3
]}

Gigmes, Didier ^{[1
]}

机构：

[1] Aix Marseille Univ, CNRS, Inst Chim Radicalaire ICR, UMR 7273, F-13397 Marseille, France

[2] CNRS, IMS, UMR 5218, F-33400 Talence, France

[3] Univ Cergy Pontoise, LPPI, F-95031 Cergy Pontoise, France

[4] IMS, Bordeaux INP, UMR 5218, F-33400 Talence, France

来源：

ORGANIC ELECTRONICS | 2015年 / 25卷

关键词：

FIrpic; Blue dopant; Polymer LED; Electroluminescence; Carbazole; Solution; LIGHT-EMITTING-DIODES; IRIDIUM III COMPLEX; ORGANIC ELECTROLUMINESCENT DEVICES; HIGH TRIPLET ENERGY; ELECTROCHEMICAL-CELLS; EFFICIENT BLUE; ELECTROPHOSPHORESCENT DEVICES; CONJUGATED POLYMERS; BIPOLAR HOST; EMISSION;

D O I：

10.1016/j.orgel.2015.06.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new carbazole-based polymer PEPEK varying from the previously reported PEPK by the length of the spacer between the polymer backbone and the pendent carbazole moiety was investigated as polymeric host for solution-processed devices. Interestingly, if the two polymers are structurally close since the length of the alkyl chain only differs from one carbon atom, the previously reported PEPK gave higher performances than the newly synthesized PEPEK when tested as host for the wide bandgap triplet emitter FIrpic. To optimize electroluminescence performances, two device configurations were examined. On doping the emissive layer of phosphorescent organic light-emitting devices (OLEDs) at 16 wt% with FIrpic, best PEPK-based OLEDs gave an efficacy of 15.14 cd/A whereas PEPEK-based devices furnished an efficiency of 12.17 cd/A in the same conditions. To determine the origin of this unexpected behavior, the new polymer PEPEK was characterized by UV-visible absorption and luminescence spectroscopy as well as cyclic voltammetry. Thermal properties of PEPEK were also examined and compared to those of PEPK. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：21 / 30

页数：10

共 70 条

[1] Nearly 100% internal phosphorescence efficiency in an organic light-emitting device [J].

Adachi, C ;

Baldo, MA ;

Thompson, ME ;

Forrest, SR .

JOURNAL OF APPLIED PHYSICS, 2001, 90 (10) :5048-5051

[2] High efficiency single dopant white electrophosphorescent light emitting diodes [J].

Adamovich, V ;

Brooks, J ;

Tamayo, A ;

Alexander, AM ;

Djurovich, PI ;

D'Andrade, BW ;

Adachi, C ;

Forrest, SR ;

Thompson, ME .

NEW JOURNAL OF CHEMISTRY, 2002, 26 (09) :1171-1178

[3] White polymeric light-emitting diode based on a fluorene polymer/Ir complex blend system [J].

Al Attar, HA ;

Monkman, AP ;

Tavasli, M ;

Bettington, S ;

Bryce, MR .

APPLIED PHYSICS LETTERS, 2005, 86 (12) :1-3

[4] Quantum-chemical design of host materials for full-color triplet emission [J].

Avilov, I ;

Marsal, P ;

Brédas, JL ;

Beljonne, D .

ADVANCED MATERIALS, 2004, 16 (18) :1624-+

[5] Transient analysis of organic electrophosphorescence. II. Transient analysis of triplet-triplet annihilation [J].

Baldo, MA ;

Adachi, C ;

Forrest, SR .

PHYSICAL REVIEW B, 2000, 62 (16) :10967-10977

[6] Very high-efficiency green organic light-emitting devices based on electrophosphorescence [J].

Baldo, MA ;

Lamansky, S ;

Burrows, PE ;

Thompson, ME ;

Forrest, SR .

APPLIED PHYSICS LETTERS, 1999, 75 (01) :4-6

[7] High-efficiency fluorescent organic light-emitting devices using a phosphorescent sensitizer [J].

Baldo, MA ;

Thompson, ME ;

Forrest, SR .

NATURE, 2000, 403 (6771) :750-753

[8] 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

[9] FIrpic: archetypal blue phosphorescent emitter for electroluminescence [J].

Baranoff, Etienne ;

Curchod, Basile F. E. .

DALTON TRANSACTIONS, 2015, 44 (18) :8318-8329

[10] Tuning the emission of cyclometalated iridium complexes by simple ligand modification [J].

Beeby, A ;

Bettington, S ;

Samuel, IDW ;

Wang, ZJ .

JOURNAL OF MATERIALS CHEMISTRY, 2003, 13 (01) :80-83

← 1 2 3 4 5 6 7 →