scholarly journals Air-Stable Ultrabright Inverted Organic Light-Emitting Devices with Metal Ion-Chelated Polymer Injection Layer

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Shihao Liu ◽  
Chunxiu Zang ◽  
Jiaming Zhang ◽  
Shuang Tian ◽  
Yan Wu ◽  
...  
Keyword(s):  
Metal Ion ◽  
Operating Time ◽  
Zinc Ion ◽  
High Brightness ◽  
Maximum Brightness ◽  
Polymer Injection ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Zinc Chelation

AbstractHere, this work presents an air-stable ultrabright inverted organic light-emitting device (OLED) by using zinc ion-chelated polyethylenimine (PEI) as electron injection layer. The zinc chelation is demonstrated to increase the conductivity of the PEI by three orders of magnitude and passivate the polar amine groups. With these physicochemical properties, the inverted OLED shows a record-high external quantum efficiency of 10.0% at a high brightness of 45,610 cd m−2 and can deliver a maximum brightness of 121,865 cd m−2. Besides, the inverted OLED is also demonstrated to possess an excellent air stability (humidity, 35%) with a half-brightness operating time of 541 h @ 1000 cd m−2 without any protection nor encapsulation.

Solution-processable cyclometalated gold(III) complexes for high-brightness phosphorescent white organic light-emitting devices

2020 ◽  
Vol 55 (23) ◽  
pp. 9686-9694
Author(s):  
Wai-Lung Cheung ◽  
Shiu-Lun Lai ◽  
Wing-Kei Kwok ◽  
Man-Chung Tang ◽  
Chin-Ho Lee ◽  
...  
Keyword(s):  
High Brightness ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Solution Processable ◽  
Organic Light Emitting Devices

Non-doped luminescent material based organic light-emitting devices displaying high brightness under very low driving voltage

2016 ◽  
Vol 4 (29) ◽  
pp. 7013-7019 ◽  
Author(s):  
Chenglong Li ◽  
Jinbei Wei ◽  
Xiaoxian Song ◽  
Kaiqi Ye ◽  
Hongyu Zhang ◽  
...  
Keyword(s):  
Driving Voltage ◽  
Luminescent Material ◽  
High Brightness ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices

Two phenanthro[9,10-d]imidazole (PI) derivatives, DPAA-PPI and tBuDPAA-PPI, were synthesized. The non-doped OLEDs with DPAA-PPI and tBuDPAA-PPI as emitters displayed very low driving voltages, high brightness and maximum external quantum efficiencies (EQE) of 5.2% and 4.1%, respectively.

Doping in the Mixed Layer to Achieve High Brightness and Efficiency Organic Light Emitting Devices

2002 ◽  
Vol 19 (9) ◽  
pp. 1362-1364 ◽  
Author(s):  
Gao Wen-Bao ◽  
Yang Kai-Xia ◽  
Liu Hong-Yu ◽  
Feng Jing ◽  
Liu Shi-Yong
Keyword(s):  
Mixed Layer ◽  
High Brightness ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices

Efficient Organe Organic Light-Emitting Devices Using N-arylbenzinmidzoles as Blocking Layer

2013 ◽  
Vol 734-737 ◽  
pp. 2273-2277
Author(s):  
Hui Shan Yang ◽  
Li Shuang Wu
Keyword(s):  
Blue Light ◽  
Applied Voltage ◽  
Light Emission ◽  
Blocking Layer ◽  
Peak Efficiency ◽  
Yellow Light ◽  
Maximum Brightness ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light

A orange organic light-emitting device has been fabricated with a structure of ITO/m-MTDATA (45 nm)/NPB (8 nm)/ DPVBi:DCJTB 0.5 % (15 nm)/TPBi (x nm)/Alq3[(60-x) n /LiF (1 nm)/Al£¬where x=0, 4, 7 and 10, respectively. N-arylbenzinmidzoles (TPBi) was used as the excton-blocking layer resulting mixture of lights from DPVBi molecules (blue-light) and DCJTB (yellow-light) molecules, thereby producing orange light emission. The performance of device can be readily adjusted by only varying the thickness of the TPBi layer. The Commission Internationale de 1'Eclairage (CIE) coordinates of the device are largely insensitive to diffrent of the driving voltages. When the thickness of TPBi is 7 nm, the device exhibits peak efficiency of 6.16 cd/A at the applied voltage of 8 V, and the maximum brightness is 43310 cd/m2at 15 V, respectively.

Energetics of mer/fac isomers in metal tris(8-hydroxyquinoline) chelates: Implications on charge conduction in organic light-emitting devices

2003 ◽  
Vol 771 ◽  
Author(s):  
Kim F. Ferris ◽  
Linda S. Sapochak ◽  
Deanna Rodovsky ◽  
Paul E. Burrows
Keyword(s):  
Thin Films ◽  
Metal Ion ◽  
Trap States ◽  
Trap State ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Electron Correlation Effects ◽  
The Difference ◽  
Structure Calculations

AbstractElectronic structure calculations for the mer and fac-isomers of aluminum tris (8-hydroxyquinoline) (Alq3) and the methyl-substituted series, nMeq3Al (n = 3 - 7) are presented. From these data, we estimate their relative abundances in Alq3 thin films and the resultant trap state energies. Ab initio computations performed at the SCF level suggest a significantly higher stability (6 - 7.5 kcal/mol) of the mer-isomer over the facial form, whereas MP2 treatment of electron correlation effects lowers the difference to (4 - 4.5 kcal/mol). Substitution of the Al+3 metal ion with the larger ions Ga+3 and In+3 increases the energetic preference of the meridianal form by 2.7 kcal/mol and decreases it by 0.8 kcal/mol, respectively. Trap state energies calculated by previously proposed methodologies show little difference between mer and fac trap states. These results suggest that the existence of the facial isomer in thin films of metal trisquinolates is unlikely to significantly affect charge conduction.

Extremely High Efficiency Orange Phosphorescent Organic Light-Emitting Devices

2012 ◽  
Vol 490-495 ◽  
pp. 3221-3225
Author(s):  
Yan Fang Lv ◽  
Peng Chao Zhou ◽  
Hong Lin ◽  
Fei Fei Wang ◽  
Na Wei ◽  
...  
Keyword(s):  
Power Efficiency ◽  
High Efficiency ◽  
Driving Voltage ◽  
Maximum Brightness ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Bright Orange ◽  
Hole Transporting ◽  
Phosphorescent Material

We have developed extremely high efficiency orange phosphorescent organic light-emitting diodes based on an orange phosphorescent material, employing the structure of phosphorescent dye-doped hole transporting layer to improve the power efficiency. The device shows a bright orange emission at approximately 564 nm (Commission Internationale d’Eclairage (0.49, 0.50)) and a maximum brightness of 31030 cd/m2 at a driving voltage of 7.6 V. The power efficiency of device has reached 83.56 lm/W at turn-on voltage of 2.2 V. Moreover, this power efficiency has the potential to be raised to 150 lm/W if the light outcouping can be further improved.

Sign in / Sign up

Export Citation Format

Share Document