scholarly journals 37.4: Invited Paper: Inkjet printed Cd‐free Electroluminescent Quantum Dot Light Emitting Diodes (EL‐QLEDs) as the future technology in information display technology

2021 ◽  
Vol 52 (S1) ◽  
pp. 263-263
Author(s):  
Yohan Kim ◽  
André Geßner ◽  
Hyung Seok Choi ◽  
Benjamin Heyne ◽  
Armin Wedel
Keyword(s):  
Quantum Dot ◽  
Light Emitting Diodes ◽  
Information Display ◽  
Light Emitting ◽  
Future Technology ◽  
The Future ◽  
Display Technology

scholarly journals Color-pure red light-emitting diodes based on two-dimensional lead-free perovskites

2020 ◽  
Vol 6 (42) ◽  
pp. eabb0253
Author(s):  
Fanglong Yuan ◽  
Xiaopeng Zheng ◽  
Andrew Johnston ◽  
Ya-Kun Wang ◽  
Chun Zhou ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Red Light ◽  
Crystallization Rate ◽  
Lead Free ◽  
Forming Process ◽  
Information Display ◽  
Light Emitting ◽  
Wide Color Gamut ◽  
Display Technology

It remains a central challenge to the information display community to develop red light-emitting diodes (LEDs) that meet demanding color coordinate requirements for wide color gamut displays. Here, we report high-efficiency, lead-free (PEA)2SnI4 perovskite LEDs (PeLEDs) with color coordinates (0.708, 0.292) that fulfill the Rec. 2100 specification for red emitters. Using valeric acid (VA)—which we show to be strongly coordinated to Sn2+—we slow the crystallization rate of the perovskite, improving the film morphology. The incorporation of VA also protects tin from undesired oxidation during the film-forming process. The improved films and the reduced Sn4+ content enable PeLEDs with an external quantum efficiency of 5% and an operating half-life exceeding 15 hours at an initial brightness of 20 cd/m2. This work illustrates the potential of Cd- and Pb-free PeLEDs for display technology.

Mechanisms of operation in quantum-dot light-emitting diodes

2019 ◽  
pp. 947
Author(s):  
Shoichi sano ◽  
Takashi Nagase ◽  
Takashi Kobayashi ◽  
Hiroyoshi Naito
Keyword(s):  
Quantum Dot ◽  
Light Emitting Diodes ◽  
Light Emitting

scholarly journals On the degradation mechanisms of quantum-dot light-emitting diodes

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Song Chen ◽  
Weiran Cao ◽  
Taili Liu ◽  
Sai-Wing Tsang ◽  
Yixing Yang ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Light Emitting Diodes ◽  
Degradation Mechanisms ◽  
Light Emitting

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

A Side-pumping Package Design for Hybrid-Quantum-Dot Light Emitting Diodes

2021 ◽  
pp. 1-1
Author(s):  
Chung-Ping Huang ◽  
Ting-Yu Lee ◽  
Jhen-Jia Yang ◽  
Hsiang-Yun Shih ◽  
Shun-Chieh Hsu ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Light Emitting Diodes ◽  
Package Design ◽  
Light Emitting ◽  
Side Pumping
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