On the origin of the color shift in white-emitting OLEDs

被引：123

作者：

Gather, Malte C. ^{[1
]}

Alle, Ronald ^{[1
]}

Becker, Heinrich ^{[2
]}

Meerholz, Klaus ^{[1
]}

机构：

[1] Univ Cologne, Inst Phys Chem, D-50939 Cologne, Germany

[2] Merck KGaA, Dept LC OLED, D-65926 Frankfurt, Germany

来源：

ADVANCED MATERIALS | 2007年 / 19卷 / 24期

关键词：

D O I：

10.1002/adma.200701673

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

White-emitting organic light-emitting modes (OLEDs) notoriously suffer from brightness-dependent color shifts. Based on experimental data and fundamental considerations about charge-transport and trapping, a quantitative model is developed which gives insight into the origin of this shift and describes the experimental data extremely well. Having understood the major contribution to the spectral instability, a device architecture is designed that shows excellent color stability over a wide range of brightness levels.

引用

页码：4460 / +

页数：7

共 27 条

[1] 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

[2]

BANGE S, 2007, S ORG THIN FILM EL M

[3]

Becker H, 2003, MATER RES SOC SYMP P, V769, P3

[4]

BECKER H, 2003, Patent No. 0320790

[5] LIGHT-EMITTING-DIODES WITH VARIABLE COLORS FROM POLYMER BLENDS [J].

BERGGREN, M ;

INGANAS, O ;

GUSTAFSSON, G ;

RASMUSSON, J ;

ANDERSSON, MR ;

HJERTBERG, T ;

WENNERSTROM, O .

NATURE, 1994, 372 (6505) :444-446

[6]

BUCHHAUSER D, 2004, P SPIE INT SOC OPT E, V5219, P70

[7] White organic light-emitting devices for solid-state lighting [J].

D'Andrade, BW ;

Forrest, SR .

ADVANCED MATERIALS, 2004, 16 (18) :1585-1595

[8] METHOD FOR THE DETERMINATION OF OPTICAL-CONSTANTS OF THIN-FILMS - DEPENDENCE ON EXPERIMENTAL UNCERTAINTIES [J].

DELPOZO, JM ;

DIAZ, L .

APPLIED OPTICS, 1992, 31 (22) :4474-4481

[9] Small molecular white organic light emitting devices with single emission zone [J].

Duan, Y ;

Jiang, WL ;

Li, J ;

Chen, G ;

Zhao, Y ;

Hou, JY ;

Liu, SY .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 2004, 43 (11A) :7501-7503

[10]

Falcou A., 2005, WO Patent, Patent No. [05/030827, 05030827]

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