Outcoupling Enhancement of OLEDs With a Randomly Distributed ITO Pattern Fabricated by Maskless Wet Etching Method

被引：13

作者：

Jang, Ji-Hyang ^{[1
]}

Oh, Min-Cheol ^{[1
]}

机构：

[1] Pusan Natl Univ, Sch Elect Engn, Pusan 609735, South Korea

来源：

JOURNAL OF DISPLAY TECHNOLOGY | 2013年 / 9卷 / 11期

关键词：

Displays; lighting; optical device fabrication; organic light emitting diodes (OLEDs); LIGHT EXTRACTION;

D O I：

10.1109/JDT.2013.2265696

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

To outcouple the photons trapped in OLEDs, the effect of a rough ITO surface is investigated. The rough surface is obtained by simple maskless wet etching producing a randomly distributed nano-pattern. The power efficiency is improved by 54%, and further enhanced to 83% with a microlens array. As the pattern located between the organic layer and the ITO anode overlaps strongly with the guided mode, it results in a strong scattering rather than the diffraction, so that the device produces no angular dependence or spectral shift. Electrical property and the lifetime of the device are not affected by the etched ITO.

引用

页码：900 / 903

页数：4

共 12 条

[1] 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

[2]

Choi C.-S., 2012, OPT EXPRESS, V20

[3] Polymer grating imbedded organic light emitting diodes with improved out-coupling efficiency [J].

Jang, Ji-Hyang ;

Oh, Min-Cheol ;

Yoon, Tae-Hoon ;

Kim, Jae Chang .

APPLIED PHYSICS LETTERS, 2010, 97 (12)

[4] Ultraviolet nanoimprinted polymer nanostructure for organic light emitting diode application [J].

Jeon, Sohee ;

Kang, Jae-Wook ;

Park, Hyung-Dol ;

Kim, Jang-Joo ;

Youn, Jae R. ;

Shim, Jongyoup ;

Jeong, Jun-ho ;

Choi, Dae-Geun ;

Kim, Ki-Don ;

Altun, Ali Ozhan ;

Kim, Se-Heon ;

Lee, Yong-Hee .

APPLIED PHYSICS LETTERS, 2008, 92 (22)

[5] NANO-motheye antireflection pattern by plasma treatment of polymers [J].

Kaless, A ;

Schulz, U ;

Munzert, P ;

Kaiser, N .

SURFACE & COATINGS TECHNOLOGY, 2005, 200 (1-4) :58-61

[6] Planarized SiNx/spin-on-glass photonic crystal organic light-emitting diodes [J].

Kim, Yoon-Chang ;

Cho, Sang-Hwan ;

Song, Young-Woo ;

Lee, Yong-Jae ;

Lee, Yong-Hee ;

Do, Young Rag .

APPLIED PHYSICS LETTERS, 2006, 89 (17)

[7] Optical Outcoupling Enhancement in Organic Light-Emitting Diodes: Highly Conductive Polymer as a Low-Index Layer on Microstructured ITO Electrodes [J].

Koh, Tae-Wook ;

Choi, Jung-Min ;

Lee, Sunghun ;

Yoo, Seunghyup .

ADVANCED MATERIALS, 2010, 22 (16) :1849-+

[8]

Koo WH, 2010, NAT PHOTONICS, V4, P222, DOI [10.1038/NPHOTON.2010.7, 10.1038/nphoton.2010.7]

[9] Enhancement of light extraction efficiency of organic light emitting diodes using nanostructured indium tin oxide [J].

Kumar, Arunandan ;

Srivastava, Ritu ;

Kamalasanan, M. N. ;

Mehta, Dalip Singh .

OPTICS LETTERS, 2012, 37 (04) :575-577

[10] Optimization of external coupling and light emission in organic light-emitting devices: modeling and experiment [J].

Lu, MH ;

Sturm, JC .

JOURNAL OF APPLIED PHYSICS, 2002, 91 (02) :595-604

← 1 2 →