scholarly journals Spectrally narrowed edge emission from leaky waveguide modes in organic light-emitting diodes

2009 ◽  
Vol 106 (9) ◽  
pp. 094502 ◽  
Author(s):  
Zhengqing Gan ◽  
Yun Tian ◽  
David W. Lynch ◽  
Ji-hun Kang ◽  
Q-Han Park ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Edge Emission ◽  
Light Emitting ◽  
Waveguide Modes ◽  
Organic Light ◽  
Leaky Waveguide

Spectrally narrowed edge emission from organic light-emitting diodes

2007 ◽  
Vol 91 (14) ◽  
pp. 143504 ◽  
Author(s):  
Yun Tian ◽  
Zhengqing Gan ◽  
Zhaoqun Zhou ◽  
David W. Lynch ◽  
Joseph Shinar ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Edge Emission ◽  
Light Emitting ◽  
Organic Light

Study of Edge Emission and its Induced Photo Pumping by Using Microcavity Organic Light Emitting Diodes

2013 ◽  
Vol 760-762 ◽  
pp. 30-34
Author(s):  
Hong Guang Xu ◽  
Feng Ran ◽  
Yuan Ji ◽  
Bin Wei ◽  
Wen Qing Zhu
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Edge Emission ◽  
Light Emitting ◽  
Surface Emission ◽  
Organic Light ◽  
Dielectric Mirrors ◽  
Metal Cathode ◽  
Microcavity Devices ◽  
Low Refractive Index

The authors have investigated the edge emission of microcavities which are formed by low-molecular organic light emitting diodes sandwiched between dielectric mirrors and the metal cathode. The edge emission relative to the surface emission is found to significantly depend on the layer number of alternating high and low refractive index films in dielectric mirrors. The enhancement of cavity devices can reach a factor of ~3.0 compared with noncavity devices. Spectra of organic film pumped by edge emission of microcavity devices have been observed, a mechanism of achievement of an amplified spontaneous emission has been discussed theoretically.

scholarly journals Tackling light trapping in organic light-emitting diodes by complete elimination of waveguide modes

2021 ◽  
Vol 7 (26) ◽  
pp. eabg0355
Author(s):  
Changyeong Jeong ◽  
Yong-Bum Park ◽  
L. Jay Guo
Keyword(s):  
Indium Tin Oxide ◽  
Waveguide Mode ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Efficiency Improvement ◽  
Light Emitting ◽  
Waveguide Modes ◽  
Organic Light ◽  
Ag Film

Conventional waveguide mode decoupling methods for organic light-emitting diodes (OLEDs) are typically not scalable and increase fabrication complexity/cost. Indium-tin-oxide–free transparent anode technologies showed efficiency improvement without affecting other device properties. However, previous works lack rigorous analysis to understand the efficiency improvement. Here, we introduced an ultrathin silver (Ag) film as transparent electrode and conducted systematic modal analysis of OLEDs and report that waveguide mode can be completely eliminated by designing an OLED structure that is below the cutoff thickness of waveguide modes. We also experimentally verified the waveguide mode removal in organic waveguides with the help of index-matching fluid and prism. The negative permittivity, extremely thin thickness (~5 nanometers), and highly conductive properties achieved by a uniform copper-seeded Ag film can suppress waveguide mode formation, enhancing external quantum efficiency without compromising any other characteristics of OLEDs, which paves the way for cost-effective high-efficiency OLEDs in current display industry.

Simultaneous Extraction of Indium Tin Oxide/Organic and Substrate Waveguide Modes from Buckled Organic Light Emitting Diodes

2011 ◽  
Vol 4 (3) ◽  
pp. 032101 ◽  
Author(s):  
Won Hoe Koo ◽  
Fumito Araoka ◽  
Ken Ishikawa ◽  
Soon Moon Jeong ◽  
Suzushi Nishimura ◽  
...  
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Simultaneous Extraction ◽  
Waveguide Modes ◽  
Organic Light

Fabrication and Characterization of Blue Organic Light-emitting Diodes

2011 ◽  
Author(s):  
Merric Srour ◽  
Richard Fu ◽  
Steven Blomquist ◽  
Jianmin Shi ◽  
Eric Forsythe ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Fabrication And Characterization
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