High-Efficient Deep-Blue Light-Emitting Diodes by Using High Quality ZnxCd1-xS/ZnS Core/Shell Quantum Dots

2013 ◽  
Vol 24 (16) ◽  
pp. 2367-2373 ◽  
Author(s):  
Huaibin Shen ◽  
Xianwei Bai ◽  
Aqiang Wang ◽  
Hongzhe Wang ◽  
Lei Qian ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Blue Light ◽  
Light Emitting Diodes ◽  
Core Shell ◽  
High Quality ◽  
Light Emitting ◽  
Deep Blue ◽  
High Efficient

scholarly journals Phosphine-Free-Synthesized ZnSe/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes

2021 ◽  
Vol 11 (21) ◽  
pp. 10060
Author(s):  
Nyamsuren Byambasuren ◽  
Jiyeon Jo ◽  
Hyungduk Ko ◽  
Byeong-Kwon Ju ◽  
Ji Young Byun ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Blue Light ◽  
White Light ◽  
Light Emitting Diodes ◽  
Core Shell ◽  
Light Emitting ◽  
White Leds ◽  
Deep Blue ◽  
Near Ultraviolet

Blue-light-emitting ZnSe core (C) and ZnSe/ZnS core/shell (C/S) quantum dots (QDs) were synthesized with phosphine-free precursors by a thermal decomposition method in paraffin oil solvent and applied to QD-converted light-emitting diodes (LEDs). The optical properties of the synthesized ZnSe C and ZnSe/ZnS C/S QDs were characterized by absorption spectroscopy and photoluminescence spectroscopy. Additionally, the quantum efficiency of the QDs was investigated. Their structural properties were studied with X-ray crystallography and transmission electron microscopy. The ZnSe/ZnS C/S QDs showed deep-blue light peaking at 425 nm. The blue-light-emitting ZnSe/ZnS C/S QDs were used as color-converting materials for near-ultraviolet LED-pumped blue LEDs and combined with yellow-light-emitting Zn-Cu-In-S/ZnS C/S QDs to fabricate white LEDs. The white LEDs showed warm white light [(CIE x, CIE y) = (0.4088, 0.3987)], Tc = 3488 K, and Ra = 61.2]. The results indicate that the ZnSe/ZnS C/S QDs have good potential for white light application after further improvements to their optical properties.

scholarly journals Quantum Dots and Applications

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 897
Author(s):  
Chang-Yeol Han ◽  
Hyun-Sik Kim ◽  
Heesun Yang
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Band Gap ◽  
Light Emitting Diodes ◽  
Photovoltaic Cells ◽  
Core Shell ◽  
Special Issue ◽  
High Quality ◽  
Light Emitting ◽  
Size Dependent

It is the unique size-dependent band gap of quantum dots (QDs) that makes them so special in various applications. They have attracted great interest, especially in optoelectronic fields such as light emitting diodes and photovoltaic cells, because their photoluminescent characteristics can be significantly improved via optimization of the processes by which they are synthesized. Control of their core/shell heterostructures is especially important and advantageous. However, a few challenges remain to be overcome before QD-based devices can completely replace current optoelectronic technology. This Special Issue provides detailed guides for synthesis of high-quality QDs and their applications. In terms of fabricating devices, tailoring optical properties of QDs and engineering defects in QD-related interfaces for higher performance remain important issues to be addressed.

Deep blue light-emitting diodes based on Cd1−xZnxS@ZnS quantum dots

2009 ◽  
Vol 20 (7) ◽  
pp. 075202 ◽  
Author(s):  
Wan Ki Bae ◽  
Jeonghun Kwak ◽  
Jaehoon Lim ◽  
Donggu Lee ◽  
Min Ki Nam ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Blue Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Deep Blue

Surface Organic Ligands-Passivated Quantum Dots: Toward High-Performance Light-Emitting Diodes with Long Lifetime

2021 ◽  
Author(s):  
Lishuang Wang ◽  
Ying Lv ◽  
Jie Lin ◽  
Jialong Zhao ◽  
Xingyuan Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Organic Ligands ◽  
Colloidal Quantum Dots ◽  
Core Shell ◽  
Light Emitting ◽  
Long Lifetime

For quantum dots light-emitting diodes (QLEDs), typical colloidal quantum dots (QDs) are usually composed of a core/shell heterostructure which is covered with organic ligands as surface passivated materials to confine...

P‐4.2: Reducing Chromaticity Shifts of Light Emitting Diodes using Gradient Alloyed Cd x Zn 1‐ x Se y S 1‐ y @ZnS Core Shell Quantum Dots

2019 ◽  
Vol 50 (S1) ◽  
pp. 702-702
Author(s):  
Jialun Tang ◽  
Fei Li ◽  
Gaoling Yang ◽  
Yong Ge ◽  
Zhaohan Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Light Emitting Diodes ◽  
Core Shell ◽  
Light Emitting

Partially pyridine-functionalized quantum dots for efficient red, green, and blue light-emitting diodes

2019 ◽  
Vol 7 (12) ◽  
pp. 3429-3435 ◽  
Author(s):  
Sukyung Choi ◽  
Jaehyun Moon ◽  
Hyunsu Cho ◽  
Byoung-Hwa Kwon ◽  
Nam Sung Cho ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Blue Light ◽  
Light Emitting Diodes ◽  
High Brightness ◽  
Light Emitting ◽  
Turn On ◽  
Colloidal Quantum Dot

Surface-exchanged, partially pyridine-functionalized colloidal quantum dot-based light-emitting diodes (QD-LEDs) exhibit a low turn-on voltage and high brightness.

Sign in / Sign up

Export Citation Format

Share Document