Effects of lateral quantum dot pitch on the formation of vertically aligned InAs site-controlled quantum dots

2003 ◽  
Vol 93 (2) ◽  
pp. 1190-1194 ◽  
Author(s):  
Tao Yang ◽  
Shigeru Kohmoto ◽  
Hitoshi Nakamura ◽  
Kiyoshi Asakawa
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Vertically Aligned

Evolution of the Shape and Size of Ingaas Selforganized Quantum Dots

1999 ◽  
Vol 583 ◽  
Author(s):  
Qianghua Xie ◽  
J. L. Brown ◽  
R. L. Jones ◽  
J. E. Van Nostrand
Keyword(s):  
Quantum Dots ◽  
Aspect Ratio ◽  
Quantum Dot ◽  
Inhomogeneous Broadening ◽  
Lateral Size ◽  
Deposition Technique ◽  
Shape Transformation ◽  
Vertically Aligned ◽  
Line Widths ◽  
Shape And Size

AbstractWe have found a shape transformation of InGaAs quantum dots formed via a fractional monolayer deposition technique on GaAs (001) surfaces. This is evidenced by the bimodal quantum dot height (peaked at 8.5 nm and 14.5 nm) and aspect ratio (peaked at 0.18 and 0.26) distributions. The lateral size, height, and aspect ratio all become convergent, suggesting a simultaneous quantum dot size equalization and shape stabilization. Photoluminescence peaks red shift as a consequence of dot growth, and their line-widths become smaller due to dot shape stabilization and size equalization. A record low inhomogeneous broadening of 18.4 meV at a wavelength of 1180 nm (4 K) is obtained for vertically-aligned, shape-stabilized, and size-equalized InGaAs dots.

NiAg-graphene quantum dot-graphene hybrid with high oxidase-like catalytic activity for sensitive colorimetric detection of malathion

2021 ◽  
Author(s):  
Xu Dan ◽  
Ruiyi Li ◽  
Qinsheng Wang ◽  
Yongqiang Yang ◽  
Haiyan Zhu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Catalytic Activity ◽  
Quantum Dot ◽  
Colorimetric Detection ◽  
Graphene Quantum Dots ◽  
Functionalized Graphene ◽  
Graphene Quantum Dot ◽  
Nickel Silver

The paper reports the synthesis of nickel-silver-graphene quantum dot-graphene hybrid. Histidine-functionalized graphene quantum dots (His-GQDs) were bonded to graphene oxide (GO) and then combined with Ni2+ and Ag+ to form...

scholarly journals Effect of Growth Temperature on the Characteristics of CsPbI3-Quantum Dots Doped Perovskite Film

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4439
Author(s):  
Shui-Yang Lien ◽  
Yu-Hao Chen ◽  
Wen-Ray Chen ◽  
Chuan-Hsi Liu ◽  
Chien-Jung Huang
Keyword(s):  
Thin Films ◽  
Thermal Stability ◽  
Quantum Dots ◽  
Quantum Dot ◽  
Growth Temperature ◽  
Electron Mobility ◽  
Surface Defects ◽  
Different Temperatures ◽  
Pb Doping ◽  
Pristine Film

In this study, adding CsPbI3 quantum dots to organic perovskite methylamine lead triiodide (CH3NH3PbI3) to form a doped perovskite film filmed by different temperatures was found to effectively reduce the formation of unsaturated metal Pb. Doping a small amount of CsPbI3 quantum dots could enhance thermal stability and improve surface defects. The electron mobility of the doped film was 2.5 times higher than the pristine film. This was a major breakthrough for inorganic quantum dot doped organic perovskite thin films.

Carbon quantum dot-sensitized hollow TiO2 spheres for high-performance visible light photocatalysis

2021 ◽  
Author(s):  
Xianfeng Zhang ◽  
Zongqun Li ◽  
Shaowen Xu ◽  
Yaowen Ruan
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
High Performance ◽  
Carbon Quantum Dots ◽  
Visible Light Photocatalysis ◽  
Carbon Quantum Dot ◽  
Visible Light Photocatalytic

TiO2/CQD composites were synthesized through carbon quantum dots covalently attached to the surface of hollow TiO2 spheres for visible light photocatalytic degradation of organics.

scholarly journals Flexible and efficient perovskite quantum dot solar cells via hybrid interfacial architecture

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Long Hu ◽  
Qian Zhao ◽  
Shujuan Huang ◽  
Jianghui Zheng ◽  
Xinwei Guan ◽  
...  
Keyword(s):  
Thin Film ◽  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
High Performance ◽  
Mechanical Stability ◽  
Mechanical Adhesion ◽  
Perovskite Quantum Dots ◽  
Efficient Charge ◽  
Photovoltaic Technologies

AbstractAll-inorganic CsPbI3 perovskite quantum dots have received substantial research interest for photovoltaic applications because of higher efficiency compared to solar cells using other quantum dots materials and the various exciting properties that perovskites have to offer. These quantum dot devices also exhibit good mechanical stability amongst various thin-film photovoltaic technologies. We demonstrate higher mechanical endurance of quantum dot films compared to bulk thin film and highlight the importance of further research on high-performance and flexible optoelectronic devices using nanoscale grains as an advantage. Specifically, we develop a hybrid interfacial architecture consisting of CsPbI3 quantum dot/PCBM heterojunction, enabling an energy cascade for efficient charge transfer and mechanical adhesion. The champion CsPbI3 quantum dot solar cell has an efficiency of 15.1% (stabilized power output of 14.61%), which is among the highest report to date. Building on this strategy, we further demonstrate a highest efficiency of 12.3% in flexible quantum dot photovoltaics.

65‐3: Quantum Dot Light‐emitting Diodes with High Color Purity RGB Cadmium‐Free Quantum Dots

2021 ◽  
Vol 52 (1) ◽  
pp. 953-956
Author(s):  
Tatsuya Ryowa ◽  
Yusuke Sakakibara ◽  
Tadashi Kobashi ◽  
Keisuke Kitano ◽  
Masaya Ueda ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Light Emitting Diodes ◽  
Color Purity ◽  
Light Emitting ◽  
High Color Purity

Enhanced Normal-Incident Absorption of Quantum-Dot Infrared Photodetectors With Smaller Quantum Dots

2008 ◽  
Vol 20 (14) ◽  
pp. 1240-1242 ◽  
Author(s):  
Chi-Che Tseng ◽  
Shu-Ting Chou ◽  
Yi-Hao Chen ◽  
Cheng-Nan Chen ◽  
Wei-Hsun Lin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Infrared Photodetectors ◽  
Quantum Dot Infrared Photodetectors

scholarly journals Quantum dot based 3D printed woodpile photonic crystals tuned for the visible

2019 ◽  
Vol 1 (9) ◽  
pp. 3413-3423 ◽  
Author(s):  
Ioanna Sakellari ◽  
Elmina Kabouraki ◽  
Dimitris Karanikolopoulos ◽  
Sotiris Droulias ◽  
Maria Farsari ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Photonic Crystals ◽  
Quantum Dot ◽  
Cds Quantum Dots ◽  
3D Printed

3D printed woodpile photonic crystals functionalized with CdS quantum dots are tuned for visible applications.

Electrodeposition immobilized molybdenum disulfide quantum dots and their electrochemiluminescence application in the detection of melamine residues in milk powder

2021 ◽  
Author(s):  
Yousheng Ye ◽  
Shasha Li ◽  
An Ping ◽  
Xinjun Wan ◽  
Jianguo Li
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Molybdenum Disulfide ◽  
Solid Phase ◽  
Milk Powder ◽  
One Step

In this paper, one-step hydrothermal and electrodeposition methods were used to prepare a MoS2 quantum dot (QD) solid-phase electrochemiluminescent (ECL) electrode for the detection of melamine residues in milk powder.

Measuring temperature heterogeneities during solar-photothermal heating using quantum dot nanothermometry

The Analyst ◽  
2021 ◽  
Author(s):  
Stephanie K. Loeb ◽  
Haoran Wei ◽  
Jae-Hong Kim
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Fluorescence Emission ◽  
Emission Wavelength ◽  
Wavelength Shift ◽  
Cdse Quantum Dots ◽  
Photothermal Heating

The fluorescence emission wavelength shift of CdSe quantum dots due to heat-induced lattice dilatation is used to spatially resolve temperatures in solar photothermal systems.

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