scholarly journals Distinguishing triplet energy transfer and trap-assisted recombination in multi-color organic light-emitting diode with an ultrathin phosphorescent emissive layer

2014 ◽  
Vol 115 (11) ◽  
pp. 114504 ◽  
Author(s):  
Qin Xue ◽  
Guohua Xie ◽  
Shouyin Liu ◽  
Ping Chen ◽  
Yi Zhao ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Light Emitting Diode ◽  
Triplet Energy ◽  
Light Emitting ◽  
Emissive Layer ◽  
Organic Light Emitting Diode ◽  
Organic Light ◽  
Triplet Energy Transfer

Direct Observation of Efficient Triplet–Triplet Energy Transfer in Phosphorescent Organic Light-Emitting Diode

2013 ◽  
Vol 6 (5) ◽  
pp. 052104 ◽  
Author(s):  
Hirohiko Fukagawa ◽  
Takahisa Shimizu ◽  
Yoshichika Osada ◽  
Taisuke Kamada ◽  
Yukihiro Kiribayashi ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Direct Observation ◽  
Light Emitting Diode ◽  
Triplet Energy ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light ◽  
Triplet Energy Transfer

Why Triage the Materials with Low Luminescence Quantum Efficiency: The Use of 35Cbz4BzCN as a Universal Host for Organic Light Emitting Diode through Effective Triplet Energy Transfer

2021 ◽  
Author(s):  
Yi-Mei Huang ◽  
Tse-Ying Chen ◽  
Deng-Gao Chen ◽  
Hsuan-Chi Liang ◽  
Cheng-Ham Wu ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Delayed Fluorescence ◽  
Triplet Energy ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Thermally Activated ◽  
Triplet Energy Transfer ◽  
Triplet Lifetime ◽  
Triplet Excitons

35Cbz4BzCN, a novel universal host with long triplet lifetime, has been developed. The triplet excitons in 35Cbz4BzCN can be effectively harvested by phosphorescence and thermally activated delayed fluorescence emitters. In...

Cohosts with efficient host-to-emitter energy transfer for stable blue phosphorescent organic light-emitting diodes

2021 ◽  
Author(s):  
Soo-Ghang Ihn ◽  
Eun Suk Kwon ◽  
Yongsik Jung ◽  
Jong Soo Kim ◽  
Sungho Nam ◽  
...  
Keyword(s):  
Energy Transfer ◽  
High Performance ◽  
Light Emitting Diode ◽  
Organic Light Emitting Diodes ◽  
Operating Voltage ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light ◽  
Low Efficiency ◽  
Blue Phosphorescent

We present a high-performance blue phosphorescent organic light-emitting diode exhibiting a low operating voltage (4.1 V), high external quantum efficiency (23.4%, at 500 cd m-2) with a low efficiency roll-off...

scholarly journals Organic Light-Emitting Diode with Color Tunable between Bluish-White Daylight and Orange-White Dusk Hue

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Shih-Yun Liao ◽  
Sudhir Kumar ◽  
Hui-Huan Yu ◽  
Chih-Chia An ◽  
Ya-Chi Wang ◽  
...  
Keyword(s):  
Circadian Rhythm ◽  
Light Emitting Diode ◽  
Cost Effective ◽  
Color Temperature ◽  
Light Emitting ◽  
Emissive Layer ◽  
Organic Light Emitting Diode ◽  
Organic Light ◽  
Color Tunable ◽  
Living Organisms

The varying color of sunlight diurnally exhibits an important effect on circadian rhythm of living organisms. The bluish-white daylight that is suitable for work shows a color temperature as high as 9,000 K, while the homey orange-white dusk hue is as low as 2,000 K. We demonstrate in this report the feasibility of using organic light-emitting diode (OLED) technology to fabricate sunlight-style illumination with a very wide color temperature range. The color temperature can be tuned from 2,300 K to 9,300 K, for example, by changing the applied voltage from 3 to 11 V for the device composing red and yellow emitters in the first emissive layer and blue emitter in the second. Unlike the prior arts, the color-temperature span can be made much wider without any additional carrier modulation layer, which should enable a more cost effective fabrication. For example, the color-temperature span is 7,000 K for the above case, while it is 1,700 K upon the incorporation of a nanoscale hole modulation layer in between the two emissive layers. The reason why the present device can effectively regulate the shifting of recombination zone is because the first emissive layer itself possesses an effective hole modulation barrier of 0.2 eV. This also explains why the incorporation of an extra hole modulation layer with a 0.7 eV barrier did not help extend the desirable color-temperature span since excessive holes may be blocked.

Recent development of organic light-emitting diode utilizing energy transfer from exciplex to phosphorescent emitter

2016 ◽  
Author(s):  
Satoshi Seo ◽  
Satoko Shitagaki ◽  
Nobuharu Ohsawa ◽  
Hideko Inoue ◽  
Kunihiko Suzuki ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light

High efficiency green phosphorescent top-emitting organic light-emitting diode with ultrathin non-doped emissive layer

2014 ◽  
Vol 15 (10) ◽  
pp. 2408-2413 ◽  
Author(s):  
Xindong Shi ◽  
Jun Liu ◽  
Jing Wang ◽  
Xinkai Wu ◽  
Youxuan Zheng ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Emissive Layer ◽  
Organic Light Emitting Diode ◽  
Organic Light
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