scholarly journals Low efficiency roll-off and high color stability pure fluorescent white organic light-emitting diode based exciplex host

RSC Advances ◽  
2018 ◽  
Vol 8 (2) ◽  
pp. 954-959 ◽  
Author(s):  
Heng Zhang ◽  
Ziqi Wang ◽  
Long Gao ◽  
Bo Zhao ◽  
Wenlian Li
Keyword(s):  
Light Emitting Diode ◽  
Color Stability ◽  
Triplet Exciton ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light ◽  
Low Efficiency

Low efficiency roll-off and high color stability pure fluorescent WOLEDs with a blue exciplex host and orange rubrene dopant were realized by utilizing the bipolarity and triplet exciton up-conversion of the exciplex host.

Reduced efficiency roll-off in phosphorescent OLEDs with a stack emitting layer facilitating triplet exciton diffusion

RSC Advances ◽  
2015 ◽  
Vol 5 (108) ◽  
pp. 89041-89046 ◽  
Author(s):  
Shuqing Yuan ◽  
Yuying Hao ◽  
Yanqin Miao ◽  
Qinjun Sun ◽  
Zhanfeng Li ◽  
...  
Keyword(s):  
Ultrathin Films ◽  
High Efficiency ◽  
Light Emitting Diode ◽  
Triplet Exciton ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Exciton Diffusion ◽  
Organic Light ◽  
Low Efficiency

A high efficiency and low efficiency roll-off phosphorescent organic light-emitting diode (PHOLED) is demonstrated based on a stack emitting layer by alternating [CBP : 4 wt% Ir(ppy)3 (5 nm)] and [CBP : 8 wt% Ir(ppy)3 (5 nm)] ultrathin films.

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...

Using interlayer step-wise triplet transfer to achieve an efficient white organic light-emitting diode with high color-stability

2014 ◽  
Vol 104 (19) ◽  
pp. 193303 ◽  
Author(s):  
Qi Wang ◽  
Dongge Ma ◽  
Karl Leo ◽  
Junqiao Ding ◽  
Lixiang Wang ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Color Stability ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light

scholarly journals Optimal Color Stability for White Organic Light-Emitting Diode (WOLED) by Using Multiple-Ultra-Thin Layers (MUTL)

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Kan-Lin Chen ◽  
Chien-Jung Huang ◽  
Wen-Ray Chen ◽  
Fong-Yi Lin ◽  
Teen-Hang Meen ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Color Stability ◽  
Thin Layers ◽  
Slight Variation ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Glass Substrates ◽  
Organic Light ◽  
Ito Glass ◽  
Better Than

The work demonstrates the improvement of color stability for white organic light-emitting diode (WOLED). The devices were prepared by vacuum deposition on ITO-glass substrates. These guest materials of 5,6,11,12-tetraphenylnaphthacene (Rubrene) were deposited in 4,4′-bis(2,2-diphenyl vinyl)-1,1′-biphenyl (DPVBi), resulting in an emitting layer. Experimental results reveal that the properties in the multiple-ultra-thin layer (MUTL) are better than those of the emitting layer with a single guest material, reaching the commercial white-light wavelength requirement of 400–700 nm. The function of the MUTL is as the light-emitting and trapping layer. The results show that the MUTL has excellent carrier capture effect, leading to high color stability of the device at various applied voltages. The Commissions Internationale De L’Eclairage (CIE) coordinate of this device at 3~7 V is few displacement and shows a very slight variation of (0.016, 0.009). The CIE coordinates at a maximal luminance of 9980 cd/m2are (0.34, 0.33).

A hybrid white organic light-emitting diode with above 20% external quantum efficiency and extremely low efficiency roll-off

2014 ◽  
Vol 2 (36) ◽  
pp. 7494-7504 ◽  
Author(s):  
Ning Sun ◽  
Qi Wang ◽  
Yongbiao Zhao ◽  
Dezhi Yang ◽  
Fangchao Zhao ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Light Emitting Diode ◽  
Structure Design ◽  
Device Structure ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light ◽  
Low Efficiency

Based on a delicate device structure design, a novel (phosphorescence/fluorescence) hybrid WOLED with nearly 100% exciton harvesting has been demonstrated.

High color stability and CRI (>80) fluorescent white organic light-emitting diode based pure emission of exciplexes by employing merely complementary colors

2018 ◽  
Vol 6 (2) ◽  
pp. 304-311 ◽  
Author(s):  
Bo Zhao ◽  
Heng Zhang ◽  
Yanqin Miao ◽  
Ziqi Wang ◽  
Long Gao ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Color Stability ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light

High color stability and CRI (>80) pure exciplex WOLEDs with merely complementary colors of orange- and blue-exciplexes are realized with the application of spacers.

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