scholarly journals Organic Light-Emitting Diodes: Solving Efficiency-Stability Tradeoff in Top-Emitting Organic Light-Emitting Devices by Employing Periodically Corrugated Metallic Cathode (Adv. Mater. 9/2012)

2012 ◽  
Vol 24 (9) ◽  
pp. 1137-1137
Author(s):  
Yu Jin ◽  
Jing Feng ◽  
Xu-Lin Zhang ◽  
Yan-Gang Bi ◽  
Yu Bai ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices

Yellow Organic Light-Emitting Devices Based on Alq Doped DPIHQZn

2013 ◽  
Vol 785-786 ◽  
pp. 563-566
Author(s):  
Yong Hui Gao ◽  
Zhong Qi You ◽  
Wen Long Jiang
Keyword(s):  
Applied Voltage ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Maximum Luminance ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Hole Transporting ◽  
Organic Light Emitting Devices

The Electroluminescence (EL) characteristics of a novel yellow emitting material (DPIHQZn) were investigated in this paper. The results demonstrated the DPIHQZn with strong emitting and hole-transporting ability. Based on the performance,a series of doping yellow organic light-emitting diodes were fabricated.The yellow devices were fabricated as follows: ITO/ 2T-NATA(40 nm)/NPB(10 nm)/Alq:x%DPIHQZn (35 nm)/Alq (35 nm)/LiF(5 nm)/ Al,x=1,2,3,5;the maximum luminance was 3180 cd/m2at an applied voltage of 15V,while the Commission International de LEclairage coordinates was (0.40,0.48).

Deep blue organic light-emitting devices enabled by bipolar phenanthro[9,10-d]imidazole derivatives

RSC Advances ◽  
2015 ◽  
Vol 5 (88) ◽  
pp. 72009-72018 ◽  
Author(s):  
Shuo Chen ◽  
Yukun Wu ◽  
Yi Zhao ◽  
Daining Fang
Keyword(s):  
Light Emitting Diodes ◽  
Blue Emission ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Imidazole Derivatives ◽  
Deep Blue ◽  
Organic Light ◽  
Organic Light Emitting Devices

Novel phenanthroimidazole derivatives with D–π–A structures have been successfully designed and prepared. Non-doped organic light emitting diodes (OLEDs) were fabricated by employing the compounds, which display deep blue emission.

Multifunctional emitters for efficient simplified non-doped blueish green organic light emitting devices with extremely low efficiency roll-off

2017 ◽  
Vol 5 (26) ◽  
pp. 6527-6536 ◽  
Author(s):  
Amjad Islam ◽  
Dongdong Zhang ◽  
Xinhua Ouyang ◽  
Rongjuan Yang ◽  
Tao Lei ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Scientific Research ◽  
Industrial Applications ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Highly Efficient ◽  
Organic Light ◽  
Device Structures ◽  
Low Efficiency

Highly efficient organic light-emitting diodes (OLEDs) with simplified device structures are widely desired for both scientific research and industrial applications.

A life estimation model applied to organic light-emitting diodes

2018 ◽  
Vol 51 (5) ◽  
pp. 764-773
Author(s):  
JP Zhang ◽  
Y Zong ◽  
Y Meng ◽  
WG Pan ◽  
JS Tang
Keyword(s):  
Light Emitting Diodes ◽  
Light Emitting Diode ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Decay Data ◽  
Light Emitting Devices ◽  
Organic Light Emitting Diode ◽  
Organic Light ◽  
Extrapolation Model ◽  
Accelerated Life

For predicting life for light-emitting devices quickly and accurately, a novel life prediction model, namely an extrapolation model of accelerated life and stress, has been proposed. In this model, a Weibull function is employed to fit luminance decay data under multiple groups of accelerated stresses, and the corresponding accelerated life is obtained. By determination coefficients and root mean square errors, a power function is determined as an extrapolated function to describe the relationship between accelerated life and stress and the life of the light-emitting devices. For organic light-emitting diodes, three groups of constant-stress accelerated degradation tests were conducted by increasing current stress. An extrapolation model of accelerated life and stress was applied to process the collected luminance decay data and was evaluated by a careful comparison with organic light-emitting diode life. The results indicate that the self-designed experimental scheme for organic light-emitting diode is feasible and versatile; the predicted life is 17,113 hours, which is close to the service life derived from user feedback, and the relative error is only 2.2%. This shows that the extrapolation model of accelerated life and stress has high precision; the model reveals the expected law of luminance changing with time and intuitively depicts the life characteristics under accelerated stresses without conventional life tests. This will pave the way for a new method to predict and evaluate the life of modern light-emitting devices.

scholarly journals Phenanthro[9,10-d]triazole and imidazole derivatives: high triplet energy host materials for blue phosphorescent organic light emitting devices

2019 ◽  
Vol 6 (6) ◽  
pp. 1179-1186 ◽  
Author(s):  
Muazzam Idris ◽  
Caleb Coburn ◽  
Tyler Fleetham ◽  
JoAnna Milam-Guerrero ◽  
Peter I. Djurovich ◽  
...  
Keyword(s):  
Transport Properties ◽  
Light Emitting Diodes ◽  
Wide Bandgap ◽  
Organic Light Emitting Diodes ◽  
Triplet Energy ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Host Materials ◽  
Blue Phosphorescent

A class of wide bandgap host materials is introduced as an alternative to carbazole-based hosts to enhance the efficiency and transport properties of organic light emitting diodes (OLEDs).

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