Silica-coated gradient alloy quantum dots with high luminescence for converter materials in white light-emitting diodes

RSC Advances ◽  
2015 ◽  
Vol 5 (130) ◽  
pp. 107585-107590 ◽  
Author(s):  
Hak-Sung Jung ◽  
Young-Jae Kim ◽  
Junsang Cho ◽  
Tae-Jong Yoon ◽  
Jin-Kyu Lee
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
Nanocomposite Film ◽  
High Stability ◽  
Polymer Nanocomposite ◽  
Silica Coating ◽  
Light Emitting ◽  
Flexible Polymer ◽  
Alloy Quantum Dots ◽  
White Light Emitting Diodes

DMA catalyst played a major role in maintaining the luminescence of the QDs. After silica coating, QD@SiO2 exhibited high stability and retained their initial photoluminescence (PL) intensity in a flexible polymer nanocomposite film.

Highly luminescent and stable white light-emitting diodes created by direct incorporation of Cd-free quantum dots in silicone resins using the thiol group

2015 ◽  
Vol 3 (26) ◽  
pp. 6908-6915 ◽  
Author(s):  
Cheolsang Yoon ◽  
Taewoo Kim ◽  
Min-Ho Shin ◽  
Young-Geon Song ◽  
Kyusoon Shin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
High Stability ◽  
Light Emitting Diodes ◽  
Thiol Group ◽  
Luminous Efficiency ◽  
Light Emitting ◽  
White Light Emitting Diodes ◽  
Color Conversion ◽  
Direct Incorporation

WLEDs fabricated by direct incorporation of QDs into silicone resins using the thiol group exhibit enhanced color conversion and luminous efficiency with high stability.

53% Efficient Red Emissive Carbon Quantum Dots for High Color Rendering and Stable Warm White‐Light‐Emitting Diodes

2017 ◽  
Vol 29 (37) ◽  
pp. 1702910 ◽  
Author(s):  
Zifei Wang ◽  
Fanglong Yuan ◽  
Xiaohong Li ◽  
Yunchao Li ◽  
Haizheng Zhong ◽  
...  
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
Light Emitting Diodes ◽  
Carbon Quantum Dots ◽  
Light Emitting ◽  
Warm White Light ◽  
White Light Emitting Diodes ◽  
Color Rendering

Room temperature synthesis of Sn2+ doped highly luminescent CsPbBr3 quantum dots for high CRI white light-emitting diodes

Nanoscale ◽  
2021 ◽  
Author(s):  
Dongdong Yan ◽  
Qionghua Mo ◽  
Shuangyi Zhao ◽  
Wensi Cai ◽  
Zhigang Zang
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
White Light ◽  
Room Temperature ◽  
Temperature Synthesis ◽  
Light Emitting ◽  
Photoluminescence Quantum Yield ◽  
Hot Injection ◽  
White Light Emitting Diodes ◽  
Cspbbr3 Quantum Dots

With a high photoluminescence quantum yield (PLQY) being able to exceed 90% for those prepared by hot injection method, CsPbBr3 quantum dots (QDs) have attracted intensive attentions for white light-emitting...

scholarly journals Solvent regulation synthesis of single-component white emission carbon quantum dots for white light-emitting diodes

2021 ◽  
Vol 10 (1) ◽  
pp. 465-477
Author(s):  
Longshi Rao ◽  
Qing Zhang ◽  
Mingfu Wen ◽  
Zhongfa Mao ◽  
Huaxian Wei ◽  
...  
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
Light Emitting Diodes ◽  
Carbon Quantum Dots ◽  
Single Component ◽  
Great Promise ◽  
Solvent Engineering ◽  
Light Emitting ◽  
White Emission ◽  
White Light Emitting Diodes

Abstract White light-emitting diodes (WLEDs) hold great promise in lighting, display, and visible light communication devices, and single-component white emission carbon quantum dots (SCWE-CQDs) as the key component of WLEDs have many outstanding advantages. However, rapid and efficient synthesis of SCWE-CQDs with high photoluminescence quantum yield (PLQY) and stability remains challenging. Here, we report a novel solvent engineering strategy to obtain highly photoluminescent SCWE-CQDs by controlling the dilution ratios between N,N-dimethylformamide (DMF) and pristine red carbon quantum dots (RCQDs) solution. By optimizing synthesis conditions, the relative PLQY of the SCWE-CQDs solution reached 53%. Morphological, structural, and optical property characterizations indicate that the combined action of the hydrogen bond (HB) effect and the size effect leads to the blue shift of RCQDs, but the HB effect is more dominant than the particle size in causing large spectral shifts. In addition, the WLEDs with high color rendering index of 89 and remarkable reliability were obtained based on the highly photoluminescent SCWE-CQDs. This facile solvent engineering approach for synthesizing tunable emission CQDs will promote the progress of carbon-based luminescent materials for applications in optoelectronic devices.

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