Measuring the light emission profile in organic light-emitting diodes with nanometre spatial resolution

被引：78

作者：

van Mensfoort, S. L. M. ^{[1
,2
]}

Carvelli, M. ^{[1
,2
,3
]}

Megens, M. ^{[2
]}

Wehenkel, D. ^{[1
,2
]}

Bartyzel, M. ^{[2
]}

Greiner, H. ^{[4
]}

Janssen, R. A. J. ^{[1
]}

Coehoorn, R. ^{[1
,2
]}

机构：

[1] Eindhoven Univ Technol, Dept Appl Phys, NL-5600 MB Eindhoven, Netherlands

[2] Philips Res Labs, NL-5656 AE Eindhoven, Netherlands

[3] Dutch Polymer Inst, NL-5600 AX Eindhoven, Netherlands

[4] Philips Res Labs, D-52066 Aachen, Germany

来源：

NATURE PHOTONICS | 2010年 / 4卷 / 05期

关键词：

EXCITED MOLECULES; TRIPLET EXCITONS; ELECTROLUMINESCENCE; EFFICIENT; SINGLET; LAYER; OPTIMIZATION; INJECTION; DEVICES; FILMS;

D O I：

10.1038/NPHOTON.2010.32

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Determining the precise shape of the emission profile across the thickness of the active layer in organic light-emitting diodes is of importance for device optimization and assessing the validity of advanced device models. We present a comprehensive method for accurately measuring the shape of the emission profile, the intrinsic spectrum of emitting dipoles and the emitting dipole orientation. The method uses a microcavity light outcoupling model, which includes self-absorption and optical anisotropy, and is based on the full wavelength, angle and polarization resolved emission intensity. Application to blue (polyfluorene-based) and orange-red (NRS-PPV) polymer organic light-emitting diodes reveals a peaked shape of the emission profile. A significant voltage and layer thickness dependence of the peak positions is observed, with a demonstrated resolution better than 5 nm.

引用

页码：329 / 335

页数：7

共 39 条

[1] Effect of metal films on the photoluminescence and electroluminescence of conjugated polymers [J].

Becker, H ;

Burns, SE ;

Friend, RH .

PHYSICAL REVIEW B, 1997, 56 (04) :1893-1905

[2] Weak microcavity effects in organic light-emitting devices [J].

Bulovic, V ;

Khalfin, VB ;

Gu, G ;

Burrows, PE ;

Garbuzov, DZ ;

Forrest, SR .

PHYSICAL REVIEW B, 1998, 58 (07) :3730-3740

[3] 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

[4] Efficient and rigorous modeling of light emission in planar multilayer organic light-emitting diodes [J].

Chen, Xue-Wen ;

Choy, Wallace C. H. ;

He, Sailing .

JOURNAL OF DISPLAY TECHNOLOGY, 2007, 3 (02) :110-117

[5]

COEHOORN R, 2006, P SPIE, V6192

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

D'Andrade, BW ;

Forrest, SR .

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

[7]

DANDRADE BW, 2008, P SPIE, V7051

[8] Modification of PEDOT: PSS as hole injection layer in polymer LEDs [J].

de Kok, MM ;

Buechel, M ;

Vulto, SIE ;

van de Weijer, P ;

Meulenkamp, EA ;

de Winter, SHPM ;

Mank, AJG ;

Vorstenbosch, HJM ;

Weijtens, CHL ;

van Elsbergen, V .

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2004, 201 (06) :1342-1359

[9] Measuring the profile of the emission zone in polymeric organic light-emitting diodes [J].

Gather, Malte C. ;

Flaemmich, Michael ;

Danz, Norbert ;

Michaelis, Dirk ;

Meerholz, Klaus .

APPLIED PHYSICS LETTERS, 2009, 94 (26)

[10] Determination of the emission zone in a single-layer polymer light-emitting diode through optical measurements [J].

Granlund, T ;

Pettersson, LAA ;

Inganäs, O .

JOURNAL OF APPLIED PHYSICS, 2001, 89 (11) :5897-5902

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