scholarly journals Improvement of Colour Gamut in Bottom-Emission Organic Light-Emitting Diodes Using Micro-Cavity Structure Embedded Cathodes

Electronics ◽  
2018 ◽  
Vol 7 (9) ◽  
pp. 155 ◽  
Author(s):  
Hyunkoo Lee ◽  
Jonghee Lee ◽  
Jeong-Ik Lee ◽  
Nam Cho
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Optical Length ◽  
Television System ◽  
Light Emitting ◽  
Organic Light ◽  
Cavity Structure ◽  
Colour Gamut ◽  
Micro Cavity

We demonstrate an approach for improving the colour gamut of bottom-emission organic light-emitting diodes (OLEDs) through micro-cavity structure embedded cathodes. The devices with micro-cavity structure embedded cathodes showed an improved colour gamut of 91.5% (National Television System Committee (NTSC)), 95.8% (Adobe RGB), and 129.2% (sRGB), compared to those of the devices without micro-cavity structure embedded cathodes—59.2% (NTSC), 62.0% (Adobe RGB), 83.6% (sRGB). In addition, the performance of red, green, and blue devices are also investigated depending on the optical length of the micro-cavity structure.

Straight-forward control of the degree of micro-cavity effects in organic light-emitting diodes based on a thin striped metal layer

2013 ◽  
Vol 14 (10) ◽  
pp. 2444-2450 ◽  
Author(s):  
Jonghee Lee ◽  
Hyunsu Cho ◽  
Tae-Wook Koh ◽  
Simone Hofmann ◽  
Yong Hyun Kim ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Metal Layer ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Cavity Effects ◽  
Micro Cavity

Device performances of third order micro-cavity green top-emitting organic light emitting diodes

2015 ◽  
Vol 26 ◽  
pp. 458-463 ◽  
Author(s):  
Mi Jin Park ◽  
Young Hoon Son ◽  
Gyeong Heon Kim ◽  
Raju Lampande ◽  
Hyeong Woo Bae ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Third Order ◽  
Light Emitting ◽  
Organic Light ◽  
Micro Cavity

Low absorption semi-transparent cathode for micro-cavity top-emitting organic light emitting diodes

2018 ◽  
Vol 52 ◽  
pp. 153-158 ◽  
Author(s):  
Mi Jin Park ◽  
Seong Keun Kim ◽  
Ramchandra Pode ◽  
Jang Hyuk Kwon
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Micro Cavity

Enhancing the lifetime of field-emission organic light-emitting diodes using a cavity structure

2009 ◽  
Vol 517 (17) ◽  
pp. 5330-5332 ◽  
Author(s):  
Chi-Shing Li ◽  
Shui-Hsiang Su ◽  
Hsiang-Yu Chi ◽  
Zhi-Bin Li ◽  
Meiso Yokoyama
Keyword(s):  
Field Emission ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Cavity Structure

Improved Out-Coupling Emission of Organic Light-Emitting Diodes by Employing Ag-Thin-Film or Al2O3-Thin-Film Longitudinal Wave Guides

2016 ◽  
Vol 723 ◽  
pp. 486-491
Author(s):  
Yang Lin ◽  
Shi Qi Liu ◽  
Wei Ling Li ◽  
Guo Chen ◽  
Bin Wei
Keyword(s):  
Thin Film ◽  
Longitudinal Wave ◽  
Light Emitting Diodes ◽  
Mode Selection ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Layers ◽  
Organic Light ◽  
Wave Guides ◽  
Micro Cavity

We improved the current efficiencies of Organic Light-emitting diodes from 50 cd/A to 77.7 and 65.4 cd/A by employing Ag-thin-film and Al2O3-thin-film longitudinal wave guides with the same device structures, respectively, which was attributed to the recycle use of the internal mode because the reflection of the thin-film longitude wave guides. In addition, the introduction of these wave guides exported slight influence on the spectra which was resulted from mode selection by the micro-cavity consisting of ITO and organic layers.

scholarly journals Color-Tunable Organic Light Emitting Diodes for Deep Blue Emission by Regulating the Optical Micro-Cavity

Molecules ◽  
2020 ◽  
Vol 25 (12) ◽  
pp. 2867
Author(s):  
Jixin Jiang ◽  
Weiye Zheng ◽  
Junfei Chen ◽  
Zheng Xu ◽  
Dandan Song ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Resonant Cavity ◽  
Blue Emission ◽  
Optical Path ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Deep Blue ◽  
Organic Light ◽  
Blue Emitters ◽  
Micro Cavity

Nowadays, most blue organic light emitting diodes (OLEDs) are fabricated by using sky-blue emitters which are more easily synthesized when compared with other deep blue emitters. Herein, we put forward a new idea of using an optical micro-cavity based on metal electrodes to regulate electroluminance (EL) spectra of sky-blue organic light emitting diodes to obtain a saturated deep blue emission with a narrowed full-width at half-maximum (FWHM). First, we simulate micro-cavity OLEDs and find that the transmission of the anode plays an important role in the forward emission. Meanwhile, the optical path of micro-cavity OLEDs as well as the phase shifting from electrodes influence the EL spectra and induce the extra intensity enhancement. The results show that when the resonant cavity optical path is regulated by changing the thickness of emitting layer (EML) from 25 nm to 75 nm in the micro-cavity, the EL peak of blue OLEDs has a redshift from 479 nm to 493 nm with FWHM shifting from 69.8 nm to 83.2 nm, when compared to the device without the micro-cavity, whose approximate EL peak and FWHM are 487 nm and 87 nm, respectively. However, the efficiency of electroluminescence decreases in micro-cavity OLEDs. We speculate that this is on account of the ohmic contact between ITO and Ag, the surface plasma effect and the rough morphology induced by Ag electrodes.

Micro-cavity organic light emitting diodes for biochip applications

2006 ◽  
Vol 352 (23-25) ◽  
pp. 2476-2479 ◽  
Author(s):  
F. Michelotti ◽  
G. Roma ◽  
A. Belardini ◽  
N. Danz ◽  
A. Pace ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Micro Cavity
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