Synthesis, characterization and evaluation of aqueous Zn-based quantum dots for Bioapplications

2022 ◽  
Author(s):  
Athina Papadopoulou ◽  
Nikolaos Chalmpes ◽  
Dimitrios Gournis ◽  
Nikoleta Kostopoulou ◽  
Eleni K Efthimiadou
Keyword(s):  
Quantum Dots ◽  
Spherical Shape ◽  
Size Composition ◽  
Optoelectronic Properties ◽  
Semiconducting Nanoparticles

Semiconducting nanoparticles called quantum dots (Qds) present unique optoelectronic properties based on their extremely small size, composition, and spherical shape, which make them suitable for use as diagnostic and theranostic...

Surface Passivation by Congeneric Quantum Dots for High-Performance and Stable CsPbBr3-Based Photodetectors

2021 ◽  
Author(s):  
Shikai Yan ◽  
Sheng Tang ◽  
Manman Luo ◽  
Lu Xue ◽  
Shilin Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Surface Passivation ◽  
Low Cost ◽  
Optoelectronic Properties ◽  
Solution Processing

CsPbBr3-based photodetectors (PDs) have aroused enormous attention owing to their low-cost solution processing, outstanding optoelectronic properties, and remarkable stability. However, their performances remain a big challenge to meet the requirement...

Nanoscale optoelectronic properties of organic p–n junction P3HT/PCBM nanoparticles hybridized with CdSe/ZnS quantum dots

2014 ◽  
Vol 193 ◽  
pp. 17-22 ◽  
Author(s):  
Cheol-Joon Park ◽  
Yong-baek Lee ◽  
Sumin Jeon ◽  
Jeongyong Kim ◽  
Kwang-Sup Lee ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optoelectronic Properties ◽  
Organic P

Hydrostatic Pressure Dependent Optoelectronic Properties of InGaAsN/GaAs Spherical Quantum Dots for Laser Diode Applications

2018 ◽  
Vol 256 (3) ◽  
pp. 1800395 ◽  
Author(s):  
Indranil Mal ◽  
Joseph Jayarubi ◽  
Subhasis Das ◽  
Akant Sagar Sharma ◽  
Amalorpavam John Peter ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Hydrostatic Pressure ◽  
Laser Diode ◽  
Optoelectronic Properties

scholarly journals Tunable transport and optoelectronic properties of monolayer black phosphorus by grafting PdCl2 quantum dots

RSC Advances ◽  
2018 ◽  
Vol 8 (61) ◽  
pp. 35226-35236 ◽  
Author(s):  
Cuicui Sun ◽  
Yuxiu Wang ◽  
Yingjie Jiang ◽  
Zhao-Di Yang ◽  
Guiling Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Black Phosphorus ◽  
Optoelectronic Properties ◽  
Photoelectric Properties ◽  
First Time

The photoelectric properties of the coordination functionalized monolayer black phosphorus by PdCl2 quantum dots are revealed for the first time.

Growth rate effects on the size, composition and optical properties of InAs/GaAs quantum dots grown by molecular beam epitaxy

2001 ◽  
Vol 227-228 ◽  
pp. 1000-1004 ◽  
Author(s):  
P.B Joyce ◽  
T.J Krzyzewski ◽  
G.R Bell ◽  
T.S Jones ◽  
S Malik ◽  
...  
Keyword(s):  
Growth Rate ◽  
Quantum Dots ◽  
Optical Properties ◽  
Molecular Beam Epitaxy ◽  
Molecular Beam ◽  
Size Composition ◽  
Rate Effects

Optoelectronic properties of OLEDs based on CdSe/ZnS quantum dots and F8BT

2015 ◽  
Vol 12 (12) ◽  
pp. 1416-1420 ◽  
Author(s):  
C. Borriello ◽  
C. T. Prontera ◽  
Sh. A. Mansour ◽  
S. Aprano ◽  
M. G. Maglione ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optoelectronic Properties

Luminescence Properties of Sm3+/Eu3+ Co-Doped ZnO Quantum Dots

2016 ◽  
Vol 16 (4) ◽  
pp. 3597-3601
Author(s):  
Fengyi Liu ◽  
Hong Li ◽  
Yajing Hu ◽  
Na Jin ◽  
Yun Mou ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Sol Gel ◽  
Spherical Shape ◽  
Hexagonal Wurtzite Structure ◽  
Luminescence Properties ◽  
Transmission Electron ◽  
Doped Zno ◽  
Zno Quantum Dots ◽  
Zno Qds ◽  
Co Doped

In order to improve luminescence properties of semiconductor ZnO quantum dots (QDs), Sm3+/Eu3+ co-doped ZnO QDs have been controllably synthesized by sol–gel method in this paper. ZnO QDs have a spherical shape with mean diameter at about 5–6 nm, which was characterized by high-resolution transmission electron microscopy (HRTEM). ZnO QDs have hexagonal wurtzite structure with parts of Sm3+ and Eu3+ incorporated into the lattice, which was demonstrated by X-ray Diffraction (XRD). Luminescence properties at room temperature (RT) of different amount of Sm3+ and 2 mol% Eu3+ doped ZnO QDs were examined in-depth by optical spectra. In contrast to the Pr3+/Eu3+ co-doped fluorescent performance researched in our previous study, the photoluminescence (PL) spectra indicates the unique luminescence properties of Sm3+/Eu3+ co-doped ZnO QDs. In addition, fluorescence lifetimes were obtained to illustrate the luminous mechanism.

Microstructure and Luminescence Properties of Tb3+ Doped ZnO Quantum Dots

2016 ◽  
Vol 16 (4) ◽  
pp. 3592-3596 ◽  
Author(s):  
Na Jin ◽  
Hong Li ◽  
Fengyi Liu ◽  
Ya-Hong Xie
Keyword(s):  
Quantum Dots ◽  
Surface Defects ◽  
Light Emission ◽  
Sol Gel ◽  
Spherical Shape ◽  
Hexagonal Wurtzite Structure ◽  
Quenching Effect ◽  
Doped Zno ◽  
Zno Quantum Dots ◽  
Zno Qds

In order to increase the exchange efficiency of solar cells by down-conversion, Tb3+ doped ZnO quantum dots (QDs) were successfully synthesized by sol–gel process. The X-ray diffraction (XRD) results indicate that ZnO QDs have hexagonal wurtzite structure. ZnO QDs have a spherical shape and diameter around 5 nm, which was confirmed by high-resolution transmission electron microscopy (HRTEM). The intensity of visible light emission peaks becomes strengthened and then weakened with the increase of Tb3+ doping concentration. When the concentration is more than 1%, because of the decrease of surface defects and concentration quenching effect, the emissive intensity is weakened. The enhancement of the PL emission peaks at 542 nm, 582 nm, and 619 nm was assigned to energy transfer between Tb3+ ions and ZnO QDs host. Moreover, the absorption spectra also demonstrates energy transfers from Tb3+ ions to ZnO QDs.

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