Lanthanide based white-light-emitting hydrogel mediated by fluorescein and carbon dots with high quantum yield and multi-stimuli responsiveness

2020 ◽  
Vol 8 (10) ◽  
pp. 3380-3385 ◽  
Author(s):  
Juan Xue ◽  
Xihan Xu ◽  
Yi Zhu ◽  
Dayong Yang
Keyword(s):  
Quantum Yield ◽  
White Light ◽  
Carbon Dots ◽  
Light Emission ◽  
White Light Emission ◽  
High Quantum Yield ◽  
Light Emitting ◽  
High Quantum ◽  
Multiple Stimulus

A WLE hydrogel simultaneously possessing high quantum yield (18.00%) and multiple stimulus responsiveness is designed and synthesized. Our work provides a straightforward strategy to prepare smart white-light emission hydrogels.

A self-assembled white-light-emitting system in aqueous medium based on a macrocyclic amphiphile

2017 ◽  
Vol 53 (2) ◽  
pp. 392-395 ◽  
Author(s):  
Wen-Chao Geng ◽  
Yan-Cen Liu ◽  
Yu-Ying Wang ◽  
Zhe Xu ◽  
Zhe Zheng ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Aqueous Medium ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
High Quantum Yield ◽  
Light Emitting ◽  
High Quantum ◽  
Self Assembled

White light emission was successfully achieved with high quantum yield in a novel FRET platform based on a macrocyclic amphiphile.

Hedgehog ZnO/Ag heterostructure: an environment-friendly rare earth free potential material for cold-white light emission with high quantum yield

2018 ◽  
Vol 124 (11) ◽  
Author(s):  
Puja Bhattacharyya ◽  
Swarupananda Bhattacharjee ◽  
Manoranjan Bar ◽  
Uttam Kumar Ghorai ◽  
Mrinal Pal ◽  
...  
Keyword(s):  
Rare Earth ◽  
Quantum Yield ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
High Quantum Yield ◽  
Environment Friendly ◽  
High Quantum

Multicolor tunable highly luminescent carbon dots for remote force measurement and white light emitting diodes

2019 ◽  
Vol 55 (81) ◽  
pp. 12164-12167 ◽  
Author(s):  
Ya Liu ◽  
Miaoran Zhang ◽  
Yanfen Wu ◽  
Rui Zhang ◽  
Yi Cao ◽  
...  
Keyword(s):  
Quantum Yield ◽  
White Light ◽  
Carbon Dots ◽  
Light Emitting Diodes ◽  
Solvothermal Method ◽  
Force Measurement ◽  
High Quantum Yield ◽  
Light Emitting ◽  
One Step ◽  
White Light Emitting Diodes

A one-step solvothermal method was exploited to synthesize blue, yellow and red carbon dots with high quantum yield by altering the corresponding reaction solvent.

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>

Direct synthesis of highly stable nitrogen rich carbon dots toward white light emission

RSC Advances ◽  
2015 ◽  
Vol 5 (123) ◽  
pp. 101333-101337 ◽  
Author(s):  
Manjunatha Ganiga ◽  
Jobin Cyriac
Keyword(s):  
White Light ◽  
Carbon Dots ◽  
Light Emission ◽  
Direct Synthesis ◽  
Single Step ◽  
White Light Emission ◽  
Light Emitting ◽  
Synthetic Strategy

Here we report a single step, rapid synthetic strategy for white light emitting nitrogen rich carbon dots (NCDs) under a range of excitation wavelengths by carbonizing ethylenediamine using P2O5 and water.

Luminescent carbon quantum dots with high quantum yield as a single white converter for white light emitting diodes

2015 ◽  
Vol 107 (21) ◽  
pp. 213102 ◽  
Author(s):  
X. T. Feng ◽  
F. Zhang ◽  
Y. L. Wang ◽  
Y. Zhang ◽  
Y. Z. Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
White Light ◽  
Light Emitting Diodes ◽  
Carbon Quantum Dots ◽  
High Quantum Yield ◽  
Light Emitting ◽  
High Quantum ◽  
White Light Emitting Diodes

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>

Rare earth-free composites of carbon dots/metal–organic frameworks as white light emitting phosphors

2019 ◽  
Vol 7 (8) ◽  
pp. 2207-2211 ◽  
Author(s):  
Aiwu Wang ◽  
Yun-Long Hou ◽  
Fengwen Kang ◽  
Fucong Lyu ◽  
Yuan Xiong ◽  
...  
Keyword(s):  
Rare Earth ◽  
White Light ◽  
Carbon Dots ◽  
Light Emission ◽  
Rare Earth Metals ◽  
Metal Organic Frameworks ◽  
White Light Emission ◽  
Light Emitting ◽  
Metal Organic ◽  
New Type

Here we report a new type of white light-emission material that is free of rare earth metals, fabricated by conveniently compositing carbon dots (CDs) with Zr(iv)-based metal–organic frameworks (MOFs).

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