Chromatographic property classification of narrowly distributed ZnS quantum dots

Nanoscale ◽  
2020 ◽  
Vol 12 (22) ◽  
pp. 12114-12125
Author(s):  
Sebastian Süβ ◽  
Katja Bartsch ◽  
Christina Wasmus ◽  
Cornelia Damm ◽  
Doris Segets ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Band Gap ◽  
Quantitative Evaluation ◽  
Chromatographic Property ◽  
Particle Technology

Quantitative evaluation of chromatographic classification of narrowly distributed ZnS quantum dots regarding band gap ΔEg using methods from particle technology.

scholarly journals Encapsulated Passivation of Perovskite Quantum Dot (CsPbBr3) Using a Hot-Melt Adhesive (EVA-TPR) for Enhanced Optical Stability and Efficiency

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 419
Author(s):  
Saradh Prasad ◽  
Mamduh J. Aljaafreh ◽  
Mohamad S. AlSalhi ◽  
Abeer Alshammari
Keyword(s):  
Quantum Dots ◽  
Band Gap ◽  
Surface Defects ◽  
Optoelectronic Devices ◽  
Ethylene Vinyl Acetate ◽  
Light Emitting ◽  
Optical Stability ◽  
Perovskite Quantum Dots ◽  
Polymer Light Emitting Diodes ◽  
Hot Melt

The notable photophysical characteristics of perovskite quantum dots (PQDs) (CsPbBr3) are suitable for optoelectronic devices. However, the performance of PQDs is unstable because of their surface defects. One way to address the instability is to passivate PQDs using different organic (polymers, oligomers, and dendrimers) or inorganic (ZnS, PbS) materials. In this study, we performed steady-state spectroscopic investigations to measure the photoluminescence (PL), absorption (A), transmission (T), and reflectance (R) of perovskite quantum dots (CsPbBr3) and ethylene vinyl acetate/terpene phenol (1%) (EVA-TPR (1%), or EVA) copolymer/perovskite composites in thin films with a thickness of 352 ± 5 nm. EVA is highly transparent because of its large band gap; furthermore, it is inexpensive and easy to process. However, the compatibility between PQDs and EVA should be established; therefore, a series of analyses was performed to compute parameters, such as the band gap, the coefficients of absorbance and extinction, the index of refractivity, and the dielectric constant (real and imaginary parts), from the data obtained from the above investigation. Finally, the optical conductivities of the films were studied. All these analyses showed that the EVA/PQDs were more efficient and stable both physically and optically. Hence, EVA/PQDs could become copolymer/perovskite active materials suitable for optoelectronic devices, such as solar cells and perovskite/polymer light-emitting diodes (PPLEDs).

Band gap energy of PbS quantum dots in oxide glasses as a function of concentration

2006 ◽  
Vol 352 (32-35) ◽  
pp. 3633-3635 ◽  
Author(s):  
P.M. Naves ◽  
T.N. Gonzaga ◽  
A.F.G. Monte ◽  
N.O. Dantas
Keyword(s):  
Quantum Dots ◽  
Band Gap ◽  
Band Gap Energy ◽  
Oxide Glasses ◽  
Gap Energy ◽  
Pbs Quantum Dots

scholarly journals ZnSe Quantum Dots through a Facile one Pot Synthesis Process

2015 ◽  
Vol 34 ◽  
pp. 73-78
Author(s):  
Irtiqa Syed ◽  
Santa Chawla
Keyword(s):  
Quantum Dots ◽  
Band Gap ◽  
Quantum Confinement Effect ◽  
Hexagonal Phase ◽  
Fluorescence Decay ◽  
Synthesis Process ◽  
One Pot ◽  
One Pot Synthesis ◽  
Transmission Electron ◽  
Average Size

A novel one pot synthesis approach in oleic acid medium was employed to obtain monophasic ZnSe quantum dots (QD) of average size 3.7nm. The QDs were well crystalline in hexagonal phase as revealed by x-ray diffraction and high resolution transmission electron microscopy (HRTEM) studies. The ZnSe QDs exhibit sharp emission peak in the blue (465nm) with 385picosecond fluorescence decay time. The theoretical band gap corresponding to 3.7nm ZnSe QDs matched well with the measured 3.11eV band gap of synthesized QDs which thus showed quantum confinement effect.

Growth of CdSSe quantum dots in borosilicate glass by controlled heat treatment for band gap engineering

2018 ◽  
Vol 86 ◽  
pp. 424-432 ◽  
Author(s):  
S.R. Munishwar ◽  
P.P. Pawar ◽  
S.Y. Janbandhu ◽  
R.S. Gedam
Keyword(s):  
Heat Treatment ◽  
Quantum Dots ◽  
Band Gap ◽  
Borosilicate Glass ◽  
Band Gap Engineering

Quantum dots in photocatalytic applications: efficiently enhancing visible light photocatalytic activity by integrating CdO quantum dots as sensitizers

2017 ◽  
Vol 19 (36) ◽  
pp. 24915-24927 ◽  
Author(s):  
A. H. Reshak
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Band Gap ◽  
Visible Light Irradiation ◽  
Photocatalytic Performance ◽  
Optical Band Gap ◽  
Visible Light Active ◽  
Photocatalytic Applications ◽  
Visible Light Photocatalytic

The amalgamation of a wide optical band gap photocatalyst with visible-light-active CdO quantum dots (QDs) as sensitizers is one of the most efficient ways to improve photocatalytic performance under visible light irradiation.

scholarly journals Inhibited Spontaneous Emission of Quantum Dots Observed in a 3D Photonic Band Gap

2011 ◽  
Vol 107 (19) ◽  
Author(s):  
M. D. Leistikow ◽  
A. P. Mosk ◽  
E. Yeganegi ◽  
S. R. Huisman ◽  
A. Lagendijk ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Band Gap ◽  
Spontaneous Emission ◽  
Photonic Band Gap ◽  
Photonic Band
Sign in / Sign up

Export Citation Format

Share Document