Absolute and Relative Methods for Fluorescence Quantum Yield Evaluation of Quantum Dots

2020 ◽  
pp. 37-51
Author(s):  
Renato E. de Araujo ◽  
Christian T. Dominguez
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield

Stability and Fluorescence Quantum Yield of CdSe-ZnS Quantum Dots-Influence of the Thickness of the ZnS Shell

2008 ◽  
Vol 1130 (1) ◽  
pp. 235-241 ◽  
Author(s):  
Markus Grabolle ◽  
Jan Ziegler ◽  
Alexei Merkulov ◽  
Thomas Nann ◽  
Ute Resch-Genger
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield

Synthesis of ZnO Quantum Dots with Enhanced Fluorescence Quantum Yield

2016 ◽  
Vol 16 (7) ◽  
pp. 7622-7629 ◽  
Author(s):  
Pospisilova Martina ◽  
Mrazek Jiri ◽  
Kettou Sofiane ◽  
Dusikova Monika ◽  
Matuska Vit ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Enhanced Fluorescence ◽  
Zno Quantum Dots

scholarly journals Preparation of Graphene Quantum Dots and Their Application in Cell Imaging

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Jie Zhang ◽  
Yong-qiang Ma ◽  
Na Li ◽  
Jing-li Zhu ◽  
Ting Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Reaction Time ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Laser Scanning ◽  
Cell Imaging ◽  
Graphene Quantum Dots ◽  
Dimethyl Formamide ◽  
Experimental Conditions ◽  
Solvothermal Route

Objective. This study aims to increase the fluorescence quantum yield by improving the conditions of preparing graphene quantum dots (GQDs) through the solvothermal route and observe the GQDs performance in imaging oral squamous cells.Methodology. The following experimental conditions of GQDs preparation through the solvothermal route were improved: graphene oxide (GO)/N-N dimethyl formamide (DMF) ratio, filling percentage, and reaction time. A fluorescence spectrophotometer was used to measure photoluminescence, and the peak values were compared. Methylthiazolyldiphenyl-tetrazolium (MTT) bromide was used to detect the cytotoxicity of GQDs, which was compared with that of cadmium telluride quantum dots (CdTe QDs). GQDs were cultured with tongue cancer cells. After the coculture, a laser scanning confocal microscope (LSCM) was used to observe cell imaging.Results. The optimal conditions of GQD preparation through the solvothermal route included the following: 10 mg/mL GO/DMF ratio, 80% filling percentage, 12 h reaction time, and 17.4% fluorescence quantum yield. As the cell concentration increased, the GQD and CdTe QD groups exhibited a decreasing cell survival rate, with the decrease in the CdTe QD group being more significant. The LSCM observations showed bright green fluorescence images.Conclusion. The improved experimental conditions increased the fluorescence quantum yield of GQDs. In this study, the prepared GQDs exhibited low cytotoxicity level and satisfactory cell imaging performance.

Determination of the Fluorescence Quantum Yield of Quantum Dots: Suitable Procedures and Achievable Uncertainties

2009 ◽  
Vol 81 (15) ◽  
pp. 6285-6294 ◽  
Author(s):  
Markus Grabolle ◽  
Monika Spieles ◽  
Vladimir Lesnyak ◽  
Nikolai Gaponik ◽  
Alexander Eychmüller ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield

Controllable synthesis of dual emissive Ag:InP/ZnS quantum dots with high fluorescence quantum yield

2017 ◽  
Vol 423 ◽  
pp. 686-694 ◽  
Author(s):  
Wu Yang ◽  
Guoxing He ◽  
Shiliang Mei ◽  
Jiatao Zhu ◽  
Wanlu Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Controllable Synthesis ◽  
High Fluorescence ◽  
High Fluorescence Quantum Yield

Quantum Dots Fluorescence Quantum Yield Measured by Thermal Lens Spectroscopy

2014 ◽  
pp. 93-101 ◽  
Author(s):  
Carlos Estupiñán-López ◽  
Christian Tolentino Dominguez ◽  
Paulo E. Cabral Filho ◽  
Adriana Fontes ◽  
Renato E. de Araujo
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Thermal Lens ◽  
Fluorescence Quantum Yield ◽  
Thermal Lens Spectroscopy

scholarly journals Experimental Determination of Photo Luminesscense Quantum Yield of CdSe Quantum Dots

2016 ◽  
Vol 24 (3S2) ◽  
pp. 135-140
Author(s):  
Nguyen Thanh Binh
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Photo Luminescence ◽  
Laboratory Research ◽  
Cdse Quantum Dots ◽  
Nano Materials ◽  
Cdse Quantum Dot ◽  
National University

The fluorescence quantum yield or the efficiency of the fluorescence process is defined as the ratio of the number of photons emitted to the number of photons absorbed. In this report the experimental method to determinate photo luminescence (PL) quantum yield (QY) of CdSe quantum dot will be described. The experimental condition which depends on QY will be investigated. The QY values of CdSe which were prepared at Nano Materials Physics Laboratory Research Center for Dielectric and Advanced Matters Physics Pusan National University will be carried out and compared with the commercial CdSe sample.

scholarly journals Engineering Sr-doping for enabling long-term stable FAPb1−xSrxI3 quantum dots with 100% photoluminescence quantum yield

2021 ◽  
Vol 9 (5) ◽  
pp. 1555-1566
Author(s):  
Andrés F. Gualdrón-Reyes ◽  
David F. Macias-Pinilla ◽  
Sofia Masi ◽  
Carlos Echeverría-Arrondo ◽  
Said Agouram ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Toxic Metals ◽  
Environmentally Friendly ◽  
Photoluminescence Quantum Yield ◽  
Improved Performance ◽  
Pb Substitution

The Pb substitution in quantum dots (PQDs) with lesser toxic metals has been widely searched to be environmentally friendly, and be of comparable or improved performance compared to the lead-perovskite.

Poly(Vinylidene Fluoride)-Passivated CsPbBr3 Perovskite Quantum Dots with Near-Unity Photoluminescence Quantum Yield and Superior Stability

2021 ◽  
Author(s):  
Lin Yang ◽  
Bowen Fu ◽  
Xu Li ◽  
Hao Chen ◽  
Lili Li
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Vinylidene Fluoride ◽  
Excellent Performance ◽  
Inorganic Perovskite ◽  
Photoluminescence Quantum Yield ◽  
Poly Vinylidene Fluoride ◽  
Perovskite Quantum Dots ◽  
Optoelectronic Applications ◽  
Pl Quenching

All inorganic perovskite quantum dots (QDs) have received great attention owing to their excellent performance in optoelectronic applications. However, they often suffer from the defect-related photoluminescence (PL) quenching and phase...

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