Rapid microwave synthesis of white light emitting magic sized nano clusters of CdSe: role of oleic acid

RSC Advances ◽  
2015 ◽  
Vol 5 (94) ◽  
pp. 76733-76742 ◽  
Author(s):  
Aditi A. Jadhav ◽  
Priyesh V. More ◽  
Pawan K. Khanna
Keyword(s):  
Oleic Acid ◽  
White Light ◽  
Microwave Synthesis ◽  
Cluster Formation ◽  
One Pot ◽  
Light Emitting

A rapid green one-pot microwave synthesis of magic sized nano clusters of CdSe is presented using cycloalkeno-1,2,3-selenadiazoles as the Se source. The role of oleic acid in the cluster formation is discussed, which emit white light when illuminated with 365 nm light.

Tunable white light emitting Sr 2 V 2 O 7 :Bi 3+ phosphors: Role of bismuth ion

2017 ◽  
Vol 130 ◽  
pp. 208-214 ◽  
Author(s):  
Santosh K. Gupta ◽  
K. Sudarshan ◽  
R.M. Kadam
Keyword(s):  
White Light ◽  
Light Emitting

Developed one-pot synthesis of dual-color CdSe quantum dots for white light-emitting diode application

2018 ◽  
Vol 6 (12) ◽  
pp. 3089-3096 ◽  
Author(s):  
Sheng Dai ◽  
Cyuan-Bin Siao ◽  
Shu-Ru Chung ◽  
Kuan-Wen Wang ◽  
Xiaoqing Pan
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
Light Emitting Diode ◽  
Cdse Quantum Dots ◽  
Cdse Qds ◽  
One Pot ◽  
Synthetic Process ◽  
Light Emitting ◽  
One Pot Synthesis ◽  
Enhanced Stability

The size and fraction of red and green CdSe QDs can be controlled precisely during the synthetic process, thus manifesting remarkably enhanced stability.

Highly bright and stable white-light-emitting cadmium-free Ag,Mn co-doped Zn–In–S/ZnS quantum dots and their electroluminescence

2018 ◽  
Vol 6 (38) ◽  
pp. 10233-10240 ◽  
Author(s):  
Wen-Jin Zhang ◽  
Chun-Yang Pan ◽  
Fan Cao ◽  
Haoran Wang ◽  
Xuyong Yang
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
Low Cost ◽  
Synthetic Approach ◽  
One Pot ◽  
Light Emitting ◽  
Co Doped

Optimized white light emitting Ag,Mn:Zn–In–S quantum dots (QDs) were synthesized via a simple, scalable, reproducible, and low-cost one-pot non-injection synthetic approach.

Color Tuning of Biomass-Derived Carbon Nanodots by Reaction Temperature Toward White Light-Emitting Diodes

NANO ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. 2050159
Author(s):  
Yi Gong ◽  
Yanbing Han ◽  
Fang Zhang ◽  
Mingyue Zhai ◽  
Xing Chen ◽  
...  
Keyword(s):  
Reaction Temperature ◽  
White Light ◽  
Heating Temperature ◽  
Light Emitting Diode ◽  
Peak Position ◽  
Carbon Nanodots ◽  
One Pot ◽  
Light Emitting ◽  
White Leds ◽  
Band Emission

In this work, carbon nanodots (CNDs) were synthesized from extract of mango leaves. Sphere nanodots were formed rapidly by one-step microwave heating. The photoluminescence (PL) of the CNDs was found greatly dependent on the reaction temperature. The emission peak position of the CNDs changed from 550[Formula: see text]nm to 430[Formula: see text]nm when the heating temperature increased from 120[Formula: see text]C to 150[Formula: see text]C. Particularly, the CNDs synthesized at 130[Formula: see text]C showed multi-band emission at 411[Formula: see text]nm, 480[Formula: see text]nm and 530[Formula: see text]nm, providing emitting color from blue to yellow. Moreover, the free chlorophyll molecules in the solution added red fluorescence at 670[Formula: see text]nm, and the integrated emitting color of the CNDs solution was close to white. Coated on a commercial 365[Formula: see text]nm light-emitting diode (LED) chip, the CNDs showed greenish white light with CIE coordinates of (0.37, 0.44). This work provided a one-pot, rapid and green method to obtain multi-emissive CNDs toward white LEDs.

scholarly journals Single-Component White Light Emitting CdSexSy Alloy Nanocrystals Through Phosphine-Free Route

2020 ◽  
Author(s):  
Shilpi Jaiswal ◽  
Jyotsana Pathak ◽  
Abhijit Patra
Keyword(s):  
Quantum Yield ◽  
White Light ◽  
Light Emission ◽  
Semiconductor Nanocrystals ◽  
White Light Emission ◽  
Molar Ratio ◽  
Visible Range ◽  
One Pot ◽  
Light Emitting ◽  
Hydrogel Matrix

Semiconductor nanocrystals are promising for display and lighting devices. Herein, we report a facile one-pot synthetic route to fabricate white light emitting CdSexSy nanocrystals with enhanced quantum yield using CdO, S powder, and Se powder as precursors. The phosphine-free route was adopted, employing paraffin oil as the reducing agent and solvent for the fabrication. The optical properties can be effectively tailored by controlling the reaction time and the molar ratio of Se/S. The emission of pristine CdSexSy nanocrystals covered a broad visible range from 400 to 750 nm. The CdSexSy nanocrystals (Se/S = 0.4) exhibited white-light emission with quantum yield of 50 ± 3 % and Commission Internationale de l'Eclairage (CIE) chromaticity coordinates of (0.30, 0.31). The band-edge (~400-450 nm) to trap-state (~550-750 nm) emissions was tuned by controlling the Se/S ratio, and the different shades of white light were obtained. Furthermore, the quantum yield and CIE coordinates of the CdSexSy nanocrystals (Se/S = 0.4) were found to be similar even after 30 days of fabrication, showing the high stability of nanocrystals. The white light emission was retained in nanocrystals-embedded poly(methyl methacrylate) (PMMA) thin film and also in the hydrogel matrix. The one-pot, low-cost, scalable fabrication of white light emitting CdSexSy nanocrystals demonstrated in the present study offers promising scope in the solid-state display applications. <br>

Synthesis of single-particle level white-light-emitting carbon dots via a one-step microwave method

2018 ◽  
Vol 6 (25) ◽  
pp. 6691-6697 ◽  
Author(s):  
Kafeel Ahmad ◽  
Ayan Pal ◽  
Uday Narayan Pan ◽  
Arun Chattopadhyay ◽  
Anumita Paul
Keyword(s):  
White Light ◽  
Single Particle ◽  
Microwave Synthesis ◽  
Carbon Dots ◽  
Microwave Method ◽  
Light Emitting ◽  
Single Particle Level ◽  
Particle Level ◽  
One Step

Single-particle level white-light-emitting carbon dots via a one-step microwave synthesis.

Wide gamut white light emitting diodes using quantum dot-silicone film protected by an atomic layer deposited TiO2 barrier

2015 ◽  
Vol 51 (79) ◽  
pp. 14750-14753 ◽  
Author(s):  
Guan-Hong Chen ◽  
Chang-Wei Yeh ◽  
Ming-Hua Yeh ◽  
Shih-Jung Ho ◽  
Hsueh-Shih Chen
Keyword(s):  
Quantum Dot ◽  
Size Distribution ◽  
White Light ◽  
Light Emitting Diodes ◽  
Atomic Layer ◽  
One Pot ◽  
Light Emitting ◽  
White Light Emitting Diodes ◽  
Silicone Film

Wide gamut LEDs using QD-silicone film protected by ALD TiO2 film. The QDs with multimodal size distribution are synthesised by a one-pot method.

High color rendering index single phase white light emitting phosphors based on Tb3+/Sm3+ co-doped CePO4 nanocrystals: the role of Tb3+ as a bridge between Ce3+ and Sm3+

2019 ◽  
Vol 43 (44) ◽  
pp. 17367-17382 ◽  
Author(s):  
Sisira S. ◽  
Linju Ann Jacob ◽  
Kamal P. Mani ◽  
Biju P. R. ◽  
N. V. Unnikrishnan ◽  
...  
Keyword(s):  
White Light ◽  
Single Phase ◽  
Color Temperature ◽  
Light Emitting ◽  
Chromaticity Coordinates ◽  
Color Rendering Index ◽  
Cie Chromaticity ◽  
Color Rendering

Single phase white light emitting CePO4 nanocrystals doped with Tb3+ and Sm3+ were synthesized. The quality of white light is characterized by CIE chromaticity coordinates, color temperature, color rendering index and quantum yield.

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