The Optical Effects of Capping Layers on the Performance of Transparent Organic Light-Emitting Diodes

被引：42

作者：

Huh, Jin Woo ^{[1
]}

Moon, Jaehyun ^{[1
]}

Lee, Joo Won ^{[1
]}

Cho, Doo-Hee ^{[1
]}

Shin, Jin-Wook ^{[1
]}

Han, Jun-Han ^{[1
]}

Hwang, Joohyun ^{[1
]}

Joo, Chul Woong ^{[1
]}

Lee, Jeong-Ik ^{[1
]}

Chu, Hye Yong ^{[1
]}

机构：

[1] Elect & Telecommun Res Inst, OLED Lighting Res Team, Taejon 305700, South Korea

来源：

IEEE PHOTONICS JOURNAL | 2012年 / 4卷 / 01期

关键词：

Transparent organic light-emitting diodes; capping layer; refractive-index; bottom to top ratio; spectra matching; high efficiency; DEVICES; BILAYER;

D O I：

10.1109/JPHOT.2011.2176478

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：

In transparent organic light-emitting diodes (TOLEDs), the asymmetry in the optical paths causes difference between the bottom and top emitting lights, both in emissions and spectral distributions. Capping layers (CLs) can be used as an optical functional to enhance the emissions and adjust the spectral distributions. Here, we report on the optical effects of an organic CL, 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC), on the characteristics of TOLEDs Both simulated and experimental results are presented. We demonstrate the possibility of improving the total emission and achieving spectral matching of bottom and top emissions by varying the CL thickness. The optical effects of CLs have been interpreted from interference perspectives. Finally, we have presented a guideline that is practically useful in designing high-performance TOLEDs with CLs.

引用

页码：39 / 47

页数：9

共 18 条

[11] Application of an ultrathin LiF/Al bilayer in organic surface-emitting diodes [J].

Hung, LS ;

Tang, CW ;

Mason, MG ;

Raychaudhuri, P ;

Madathil, J .

APPLIED PHYSICS LETTERS, 2001, 78 (04) :544-546

[12]

Jenkins F.A., 1986, FUNDAMENTALS OPTICS, V4th

[13] Interlayer Engineering with Different Host Material Properties in Blue Phosphorescent Organic Light-Emitting Diodes [J].

Lee, Jonghee ;

Lee, Jeong-Ik ;

Lee, Joo-Won ;

Chu, Hye Yong .

ETRI JOURNAL, 2011, 33 (01) :32-38

[14]

MEERHEIM R, 2008, APPL PHYS LETT, V93

[15] Tuning the emission characteristics of top-emitting organic light-emitting devices by means of a dielectric capping layer: An experimental and theoretical study [J].

Riel, H ;

Karg, S ;

Beierlein, T ;

Riess, W ;

Neyts, K .

JOURNAL OF APPLIED PHYSICS, 2003, 94 (08) :5290-5296

[16] Phosphorescent top-emitting organic light-emitting devices with improved light outcoupling [J].

Riel, H ;

Karg, S ;

Beierlein, T ;

Ruhstaller, B ;

Riess, W .

APPLIED PHYSICS LETTERS, 2003, 82 (03) :466-468

[17] Interference effects in bilayer organic light-emitting diodes [J].

So, SK ;

Choi, WK ;

Leung, LM ;

Neyts, K .

APPLIED PHYSICS LETTERS, 1999, 74 (14) :1939-1941

[18] A quantitative numerical model of multilayer vapor-deposited organic light emitting diodes [J].

Staudigel, J ;

Stössel, M ;

Steuber, F ;

Simmerer, J .

JOURNAL OF APPLIED PHYSICS, 1999, 86 (07) :3895-3910

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