scholarly journals Electrophosphorescence: Very High Efficiency Orange-Red Light-Emitting Devices with Low Roll-Off at High Luminance Based on an Ideal Host-Guest System Consisting of Two Novel Phosphorescent Iridium Complexes with Bipolar Transport (Adv. Funct. Mater. 47/2

2014 ◽  
Vol 24 (47) ◽  
pp. 7560-7560
Author(s):  
Guomeng Li ◽  
Dongxia Zhu ◽  
Tai Peng ◽  
Yu Liu ◽  
Yue Wang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Red Light ◽  
Iridium Complexes ◽  
High Luminance ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Guest System ◽  
Very High

Solution-processable, high luminance deep-blue organic light emitting devices based on novel naphthalene bridged bis-triphenylamine derivatives

2019 ◽  
Vol 7 (9) ◽  
pp. 2686-2698 ◽  
Author(s):  
Yuqin Li ◽  
Siming Gao ◽  
Nan Zhang ◽  
Xin Huang ◽  
Jinchang Tian ◽  
...  
Keyword(s):  
Current Efficiency ◽  
High Luminance ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Deep Blue ◽  
Organic Light ◽  
Maximum Current ◽  
Solution Processable ◽  
Organic Light Emitting Devices ◽  
Very High

The optimal device E exhibited a very high luminance of 10 407 cd m−2 and a maximum current efficiency of 7.80 cd A−1.

Driving and Application of Blue Light Organic Light Emitting Devices

2019 ◽  
Vol 11 (5) ◽  
pp. 711-717
Author(s):  
Hongbo Liu ◽  
Minghui Liu ◽  
Lin Cong ◽  
Lizhong Wang ◽  
Tao Huang ◽  
...  
Keyword(s):  
Blue Light ◽  
High Efficiency ◽  
Low Voltage ◽  
Red Light ◽  
Portable Devices ◽  
Driving Voltage ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices

The DPVBi (4,4′-bis(2,2-diphenylvinyl-1,1′-biphenyl) is a blue-light organic fluorescence doped material, which can be used as a hole barrier layer or a luminescent layer for fabricating organic light-emitting devices. A blue light device with stable color stability and high efficiency was prepared by co-doping blue light dye DPVBi and red light dye DCJTB as light-emitting layer. In order to prevent the infiltration of O2 and moisture inside the device from affecting the luminescence lifetime of the device, the device was encapsulated by atomic layer deposition. Since the driving voltage of the organic light-emitting device is generally above 5 V and the power consumption is low, in order to facilitate driving with a low voltage, a boost driving circuit based on the XL6009 chip was designed. The driver of the fabricated blue-light device was tested. The results showed that circuit had low-voltage drive characteristics and could be widely used in small toys, lighting, and portable devices. Through the test to achieve the desired goal, the requirements of low voltage and low energy consumption were realized, and the life of the light-emitting device can be tested, which has certain practicability and reference value.

Very high-efficiency green organic light-emitting devices based on electrophosphorescence

1999 ◽  
Vol 75 (1) ◽  
pp. 4-6 ◽  
Author(s):  
M. A. Baldo ◽  
S. Lamansky ◽  
P. E. Burrows ◽  
M. E. Thompson ◽  
S. R. Forrest
Keyword(s):  
High Efficiency ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices ◽  
Very High

scholarly journals Intermediate-phase-assisted low-temperature formation of γ-CsPbI3 films for high-efficiency deep-red light-emitting devices

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Chang Yi ◽  
Chao Liu ◽  
Kaichuan Wen ◽  
Xiao-Ke Liu ◽  
Hao Zhang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Formation Energy ◽  
High Efficiency ◽  
Intermediate Phase ◽  
Light Emitting Diode ◽  
Red Light ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Device Applications ◽  
Low Dimensional

Abstract Black phase CsPbI3 is attractive for optoelectronic devices, while usually it has a high formation energy and requires an annealing temperature of above 300 °C. The formation energy can be significantly reduced by adding HI in the precursor. However, the resulting films are not suitable for light-emitting applications due to the high trap densities and low photoluminescence quantum efficiencies, and the low temperature formation mechanism is not well understood yet. Here, we demonstrate a general approach for deposition of γ-CsPbI3 films at 100 °C with high photoluminescence quantum efficiencies by adding organic ammonium cations, and the resulting light-emitting diode exhibits an external quantum efficiency of 10.4% with suppressed efficiency roll-off. We reveal that the low-temperature crystallization process is due to the formation of low-dimensional intermediate states, and followed by interionic exchange. This work provides perspectives to tune phase transition pathway at low temperature for CsPbI3 device applications.

Low voltage and very high efficiency deep-blue phosphorescent organic light-emitting devices

2008 ◽  
Vol 93 (13) ◽  
pp. 133309 ◽  
Author(s):  
Sang-Hyun Eom ◽  
Ying Zheng ◽  
Neetu Chopra ◽  
Jaewon Lee ◽  
Franky So ◽  
...  
Keyword(s):  
High Efficiency ◽  
Low Voltage ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Deep Blue ◽  
Organic Light ◽  
Organic Light Emitting Devices ◽  
Very High ◽  
Blue Phosphorescent
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