Au quantum dots engineered room temperature crystallization and magnetic anisotropy in CoFe2O4 thin films

2019 ◽  
Vol 4 (2) ◽  
pp. 434-444 ◽  
Author(s):  
Sagar E. Shirsath ◽  
Xiaoxi Liu ◽  
M. H. N. Assadi ◽  
Adnan Younis ◽  
Yukiko Yasukawa ◽  
...  
Keyword(s):  
Thin Films ◽  
Quantum Dots ◽  
Magnetic Anisotropy ◽  
Crystallization Kinetics ◽  
Room Temperature ◽  
Amorphous Substrates ◽  
First Time ◽  
Temperature Time ◽  
Temperature Crystallization

For the first time, this work presents a novel room temperature time-effective concept to manipulate the crystallization kinetics and magnetic responses of thin films grown on amorphous substrates.

scholarly journals Photooxidation and Photobleaching of Single CdSe/ZnS Quantum Dots Probed by Room-Temperature Time-Resolved Spectroscopy

2001 ◽  
Vol 105 (35) ◽  
pp. 8281-8284 ◽  
Author(s):  
Wilfried G. J. H. M. van Sark ◽  
Patrick L. T. M. Frederix ◽  
Dave J. Van den Heuvel ◽  
Hans C. Gerritsen ◽  
Ageeth A. Bol ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Room Temperature ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Temperature Time

scholarly journals Optical and Structural Properties of CdS Quantum Dots Synthesized Using (MW-CBD) Technique

2020 ◽  
pp. 44-52
Author(s):  
Ahmed Ahmed S. Abed ◽  
Sattar J. Kasim ◽  
Abbas F. Abbas
Keyword(s):  
Thin Films ◽  
Quantum Dots ◽  
Room Temperature ◽  
Energy Gap ◽  
Cds Nanoparticles ◽  
Cds Quantum Dots ◽  
Optical Energy Gap ◽  
Glass Substrates ◽  
High Adhesion ◽  
Uv Visible

In the present study, the microwave heating method was used to prepare cadmium sulfide quantum dots CdSQDs films. CdS nanoparticles size average obtained as (7nm). The morphology, structure and composition of prepared CdSQDs were examined using (FE-SEM), (XRD) and (EDX). Optical properties of CdSQDs thin films formed and deposited onto glass substrates have been studied at room temperature using UV/ Visible spectrophotometer within the wavelength of (300-800nm), and Photoluminescence (PL) spectrum. The optical energy gap (Eg) which estimated using Tauc relation was equal (2.6eV). Prepared CdS nanoparticles thin films are free from cracks, pinholes and have high adhesion to substrate.

Fe doping-stabilized γ-Ga2O3 thin films with a high room temperature saturation magnetic moment

2020 ◽  
Vol 8 (2) ◽  
pp. 536-542 ◽  
Author(s):  
Yuanqi Huang ◽  
Ang Gao ◽  
Daoyou Guo ◽  
Xia Lu ◽  
Xiao Zhang ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Magnetic Moment ◽  
Room Temperature ◽  
Fe Doping ◽  
Saturation Magnetic Moment ◽  
First Time

A thermostable Fe-doped γ-Ga2O3 thin film with a high room temperature saturation magnetic moment of 5.73 μB/Fe has been obtained for the first time.

Effect of Hydrogen Treatment on Room -Temperature Electric-Field Induced Properties in Narrow-Gap ZnCdHgTe Thin Films

2004 ◽  
Vol 813 ◽  
Author(s):  
Galina M. Khlyap ◽  
Petro G. Sydorchuk ◽  
Jacek Polit
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
Hydrogen Treatment ◽  
Narrow Gap ◽  
Glass Substrates ◽  
Semiconductor Thin Films ◽  
Visible Wavelength Range ◽  
Current Voltage ◽  
Before And After ◽  
First Time

ABSTRACTThe effect of hydrogen treatment on room temperature electric properties of narrow-gap semiconductor thin films ZnxCdyHg1−z−yTe (0 < x < 0.50, 0.20 < y < 0.40) is investigated for the first time. ZnCdHgTe films of 2 – 5 [.proportional]m thickness were grown on glass substrates by pulsed laser deposition technique. As-grown films were thermally treated in the flow of molecular H2 at 200°C during 24 hours. Comparison between electric characteristics measured before and after hydrogenation showed sufficient changes of the film resistance and appearance of photosensitivity in the visible wavelength range. Study of current-voltage characteristics of the films revealed appearance and significant change of diode-like properties.

scholarly journals Lead-free, stable, high-efficiency (52%) blue luminescent FA3Bi2Br9 perovskite quantum dots

2020 ◽  
Vol 5 (3) ◽  
pp. 580-585 ◽  
Author(s):  
Yalong Shen ◽  
Jun Yin ◽  
Bo Cai ◽  
Ziming Wang ◽  
Yuhang Dong ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Room Temperature ◽  
High Efficiency ◽  
Blue Emission ◽  
Lead Free ◽  
Photoluminescence Quantum Yield ◽  
Perovskite Quantum Dots ◽  
First Time

Lead-free Bi-based perovskite FA3Bi2X9 (X = Cl, Br, and I) quantum dots (QDs) are synthesized for the first time at room temperature. The ligand-passivated FA3Bi2Br9 QDs exhibit blue emission at 437 nm with photoluminescence quantum yield (PLQY) up to 52%.

Size Dependent Electroluminescence from CdSe Nanocrystallites (Quantum Dots)

1994 ◽  
Vol 358 ◽  
Author(s):  
B.O. Dabbousi ◽  
O. Onitsuka ◽  
M.F. Rubner ◽  
M.G. Bawendi
Keyword(s):  
Thin Films ◽  
Quantum Dots ◽  
Room Temperature ◽  
Variable Temperature ◽  
Cryogenic Temperatures ◽  
Photoluminescence Spectra ◽  
Size Dependent

ABSTRACTWe obtain spectrally narrow (FWHM < 40 nm) electroluminescence from nearly monodisperse CdSe nanocrystallites (quantum dots) incorporated into thin films of polyvinyl carbazole (PVK) and an oxadiazole derivative (PBD) sandwiched between aluminum and ITO electrodes. The electroluminescence and photoluminescence spectra are nearly identical at room temperature and are tunable from ∼530 nm to ∼650 nm by varying the size of the dots. Voltage studies at 77K indicate that while only the dots electroluminesce at the lower voltages, both the dots and the PVK matrix electroluminesce at higher applied voltages. Variable temperature studies indicate that the electroluminescence efficiency increases substantially as the films are cooled down to cryogenic temperatures.

Room-temperature crystallization of amorphous thin films by RF plasma treatment

2004 ◽  
Author(s):  
Hisashi Ohsaki ◽  
Y. Shibayama ◽  
A. Kinbara ◽  
T. Watanabe ◽  
K. Fukuhisa ◽  
...  
Keyword(s):  
Thin Films ◽  
Plasma Treatment ◽  
Room Temperature ◽  
Rf Plasma ◽  
Amorphous Thin Films ◽  
Temperature Crystallization

Room-temperature crystallization of hybrid-perovskite thin films via solvent–solvent extraction for high-performance solar cells

2015 ◽  
Vol 3 (15) ◽  
pp. 8178-8184 ◽  
Author(s):  
Yuanyuan Zhou ◽  
Mengjin Yang ◽  
Wenwen Wu ◽  
Alexander L. Vasiliev ◽  
Kai Zhu ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Solvent Extraction ◽  
High Performance ◽  
Room Temperature ◽  
High Efficiency ◽  
Hybrid Perovskite ◽  
High Efficiency Solar Cells ◽  
Temperature Crystallization ◽  
Solvent Solvent

A simple one-step solvent-bathing process based on solvent–solvent extraction, is demonstrated for the controlled room-temperature crystallization of uniform, ultra-smooth hybrid-perovskite thin films for high-efficiency solar cells.

Room temperature crystallization kinetics of amorphous Cu6Sn5+C alloys

2011 ◽  
Vol 509 (23) ◽  
pp. 6705-6710 ◽  
Author(s):  
J.S. Thorne ◽  
J.R. Dahn ◽  
M.N. Obrovac ◽  
R.A. Dunlap
Keyword(s):  
Crystallization Kinetics ◽  
Room Temperature ◽  
Kinetics Of ◽  
Temperature Crystallization

Smart Heterostructures Based on Solid Solution ZnCdHgTe

2003 ◽  
Vol 785 ◽  
Author(s):  
Galina M. Khlyap ◽  
Petro G. Sydorchuk ◽  
Jacek Polit ◽  
Macej Oszwaldowsky
Keyword(s):  
Thin Films ◽  
Solid Solution ◽  
Spectral Range ◽  
Room Temperature ◽  
Signal Frequency ◽  
Applied Bias ◽  
Current Voltage ◽  
Wide Range ◽  
Capacitance Voltage ◽  
First Time

ABSTRACTCurrent – voltage (IVC) and capacitance – voltage (CVC) of heterostructures (Cd, Zn)Te/ZnCdHgTe are studied for the first time. Thin films ZnxCdyHg1-x-yTe were grown on monocrystalline (111) CdTe and ZnTe substrates by PLE technology. Deposition was carried out on substrates held at temperatures near 290 K. The thickness of investigated films was estimated to be about 5 μm. Electric characteristics of the as-grown structures were examined under T = 77–290 K in the wide range of applied bias. All investigated samples have demonstrated diode-like IVC and CVC under test signal frequency f = 1 kHz. Heterostructures CdTe/ZnCdHgTe have exhibited a room temperature photosensitivity in spectral range 0.50–0.65 μm.

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