High-brightness perovskite quantum dot light-emitting devices using inkjet printing

2021 ◽  
Vol 93 ◽  
pp. 106168
Author(s):  
Chunbo Zheng ◽  
Xin Zheng ◽  
Chen Feng ◽  
Songman Ju ◽  
Zhongwei Xu ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Inkjet Printing ◽  
High Brightness ◽  
Light Emitting ◽  
Light Emitting Devices

Inkjet Printing Matrix Perovskite Quantum Dot Light‐Emitting Devices

2020 ◽  
Vol 5 (6) ◽  
pp. 2000099 ◽  
Author(s):  
Danyang Li ◽  
Junjie Wang ◽  
Miaozi Li ◽  
Gancheng Xie ◽  
Biao Guo ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Inkjet Printing ◽  
Light Emitting ◽  
Light Emitting Devices

Very High Brightness Quantum Dot Light-Emitting Devices via Enhanced Energy Transfer from a Phosphorescent Sensitizer

2015 ◽  
Vol 7 (46) ◽  
pp. 25828-25834 ◽  
Author(s):  
Hossein Zamani Siboni ◽  
Bahareh Sadeghimakki ◽  
Siva Sivoththaman ◽  
Hany Aziz
Keyword(s):  
Energy Transfer ◽  
Quantum Dot ◽  
High Brightness ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Very High

All-solution-processed high-brightness hybrid white quantum-dot light-emitting devices utilizing polymer modified quantum dots

2017 ◽  
Vol 42 ◽  
pp. 393-398 ◽  
Author(s):  
Jae-Sung Lee ◽  
Byoung-Ho Kang ◽  
Sang-Hyup Kim ◽  
Jun-Woo Lee ◽  
Sang-Won Lee ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Solution Processed ◽  
High Brightness ◽  
Light Emitting ◽  
Light Emitting Devices

Enhanced Performance of Pixelated Quantum Dot Light‐Emitting Diodes by Inkjet Printing of Quantum Dot–Polymer Composites

2021 ◽  
pp. 2002129
Author(s):  
Heebum Roh ◽  
Donghyun Ko ◽  
Dong Yeol Shin ◽  
Jun Hyuk Chang ◽  
Donghyo Hahm ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Polymer Composites ◽  
Inkjet Printing ◽  
Light Emitting Diodes ◽  
Light Emitting

scholarly journals Pyridinyl-Carbazole Fragments Containing Host Materials for Efficient Green and Blue Phosphorescent OLEDs

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4615
Author(s):  
Dovydas Blazevicius ◽  
Daiva Tavgeniene ◽  
Simona Sutkuviene ◽  
Ernestas Zaleckas ◽  
Ming-Ruei Jiang ◽  
...  
Keyword(s):  
Current Efficiency ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Power Efficiency ◽  
Triplet Energy ◽  
New Host ◽  
High Brightness ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Host Materials

Pyridinyl-carbazole fragments containing low molar mass compounds as host derivatives H1 and H2 were synthesized, investigated, and used for the preparation of electro-phosphorescent organic light-emitting devices (PhOLEDs). The materials demonstrated high stability against thermal decomposition with the decomposition temperatures of 361–386 °C and were suitable for the preparation of thin amorphous and homogeneous layers with very high values of glass transition temperatures of 127–139 °C. It was determined that triplet energy values of the derivatives are, correspondingly, 2.82 eV for the derivative H1 and 2.81 eV for the host H2. The new derivatives were tested as hosts of emitting layers in blue, as well as in green phosphorescent OLEDs. The blue device with 15 wt.% of the iridium(III)[bis(4,6-difluorophenyl)-pyridinato-N,C2′]picolinate (FIrpic) emitter doping ratio in host material H2 exhibited the best overall characteristics with a power efficiency of 24.9 lm/W, a current efficiency of 23.9 cd/A, and high value of 10.3% of external quantum efficiency at 100 cd/m2. The most efficient green PhOLED with 10 wt% of Ir(ppy)3 {tris(2-phenylpyridine)iridium(III)} in the H2 host showed a power efficiency of 34.1 lm/W, current efficiency of 33.9 cd/A, and a high value of 9.4% for external quantum efficiency at a high brightness of 1000 cd/m2, which is required for lighting applications. These characteristics were obtained in non-optimized PhOLEDs under an ordinary laboratory atmosphere and could be improved in the optimization process. The results demonstrate that some of the new host materials are very promising components for the development of efficient phosphorescent devices.

The Effect of Particle Size on the Charge Balance Property of Quantum Dot Light-Emitting Devices Using Zinc Oxide Nanoparticles

2021 ◽  
Vol 21 (7) ◽  
pp. 3795-3799
Author(s):  
Mi-Young Ha ◽  
Chang Kyo Kim ◽  
Dae-Gyu Moon
Keyword(s):  
Particle Size ◽  
Zinc Oxide ◽  
Quantum Dot ◽  
Zinc Oxide Nanoparticles ◽  
Transport Layer ◽  
Oxide Nanoparticles ◽  
Zno Nps ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Maximum Current

Zinc oxide nanoparticles (ZnO NPs) have been widely used as an inorganic electron transport layer (ETL) in quantum dot light-emitting devices (QLEDs) due to their excellent electrical properties. Here, we report the effect of ZnO NPs inorganic ETL of different particle sizes on the electrical and optical properties of QLEDs. We synthesized ZnO NPs into the size of 3 nm and 8 nm respectively and used them as an inorganic ETL of QLEDs. The particle size and crystal structure of the synthesized ZnO NPs were verified by Transmission electron microscopy (TEM) analysis and X-ray pattern analysis. The device with 8 nm ZnO NPs ETL exhibited higher efficiency than the 3 nm ZnO NPs ETL device in the single hole transport layer (HTL) QLEDs. The maximum current efficiency of 19.0 cd/A was achieved in the device with 8 nm ZnO NPs layer. We obtained the maximum current efficiency of 17.5 cd/A in 3 nm ZnO NPs device by optimizing bilayer HTL and ZnO NPs ETL.

Recent advances in quantum dot-based light-emitting devices: Challenges and possible solutions

2019 ◽  
Vol 24 ◽  
pp. 69-93 ◽  
Author(s):  
Zhiwen Yang ◽  
Mengyu Gao ◽  
Weijie Wu ◽  
Xuyong Yang ◽  
Xiao Wei Sun ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Recent Advances
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