Europium Doped Vanadium Dioxide Material: Reduced Phase Transition Temperature, Enhanced Luminous Transmittance and Solar Modulation

2014 ◽  
Vol 6 (3) ◽  
pp. 558-561 ◽  
Author(s):  
X. Cao ◽  
N. Wang ◽  
S. Magdassi ◽  
D. Mandler ◽  
Y. Long
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
Vanadium Dioxide ◽  
Solar Modulation

scholarly journals Mg/W-codoped vanadium dioxide thin films with enhanced visible transmittance and low phase transition temperature

2015 ◽  
Vol 3 (26) ◽  
pp. 6771-6777 ◽  
Author(s):  
Ning Wang ◽  
Shiyu Liu ◽  
X. T. Zeng ◽  
Shlomo Magdassi ◽  
Yi Long
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Transition Temperature ◽  
Charge Carrier ◽  
Band Gap ◽  
Phase Transition Temperature ◽  
Vanadium Dioxide ◽  
Visible Transmittance ◽  
Vanadium Dioxide Thin Films

Mg2+ and W6+ cations were first codoped into the VO2 lattice, resulting in a widened photon band gap and h+/e− charge carrier accumulation. These effects enhanced the thermochromic performance with a high visible transmission (∼80%) and a low phase transition temperature (∼30 °C).

Designable Phase Transition Temperature of VO2 Co-Doped with Nb and W Elements for Smart Window Application

2019 ◽  
Vol 19 (11) ◽  
pp. 7185-7191
Author(s):  
Hee Jung Kim ◽  
Dong Kyu Roh ◽  
Jung Whan Yoo ◽  
Dae-Sung Kim
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
Solar Modulation ◽  
Smart Window ◽  
Smart Windows ◽  
Co Doping ◽  
Window Applications ◽  
Nb Dopant ◽  
Co Doped

Monoclinic vanadium dioxide (VO2 (M)) particles co-doped with niobium and tungsten, with potential application in smart windows, were synthesized by hydrolysis and subsequent thermal decomposition of vanadyl sulfate. All the doped VO2 particles exhibited a monoclinic crystalline phase and the critical phase transition temperature (Tc) of VO2 (M) was adjusted by Nb and W co-doping. The Tc of Nb-doped VO2 (M) decreased at a rate of approximately 10 °C/at% Nb dopant, and the transition temperature could also be accurately controlled to room temperature (about 27 °C) by co-doping with Nb and W. A film prepared using co-doped VO2 (M) particles showed a solar modulation ability of ~18% and a luminous transmittance of 40%, indicating that the co-doped VO2 (M) particles represent suitable candidates for smart window applications.

NANOSTRUCTURE AND DROPPING PHASE TRANSITION TEMPERATURE IN VANADIUM DIOXIDE THIN FILMS

2005 ◽  
Vol 04 (01) ◽  
pp. 99-106 ◽  
Author(s):  
XINJIAN YI ◽  
YI LI ◽  
SIHAI CHEN ◽  
SHUANGBAO WANG ◽  
JIANJUN LAI ◽  
...  
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
Vanadium Dioxide ◽  
Infrared Imaging ◽  
Film Structure ◽  
Smart Window ◽  
Device Applications ◽  
Lower Temperature ◽  
Uncooled Infrared Imaging

A conventional microstructure of vanadium dioxide film with grain size of 1–2 μm exhibits a phase transition from a lower-temperature semiconductor phase to a higher-temperature metal one with a phase transition temperature of 68°C and with resistivity changes two to three orders of magnitude. Here, we report a nonconventional nanopolycrystalline thin film structure of vanadium dioxide with an average grain of 8 nm and with a phase transition temperature of about 35°C, indicating more promising device applications such as smart window coatings for solar energy, uncooled infrared imaging technology, optical and electronic switching devices, etc.

Symmetry-Controlled Structural Phase Transition Temperature in Chromium-Doped Vanadium Dioxide

2016 ◽  
Vol 120 (49) ◽  
pp. 28163-28168 ◽  
Author(s):  
Xiaogang Tan ◽  
Wei Liu ◽  
Ran Long ◽  
Xiaodong Zhang ◽  
Tao Yao ◽  
...  
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
Structural Phase Transition ◽  
Vanadium Dioxide ◽  
Structural Phase

Vanadium dioxide thin film with low phase transition temperature deposited on borosilicate glass substrate

2011 ◽  
Vol 519 (13) ◽  
pp. 4246-4248 ◽  
Author(s):  
Zhangli Huang ◽  
Sihai Chen ◽  
Boqing Wang ◽  
Ying Huang ◽  
Nengfu Liu ◽  
...  
Keyword(s):  
Thin Film ◽  
Phase Transition ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
Borosilicate Glass ◽  
Vanadium Dioxide ◽  
Glass Substrate

The structure of membranes and membrane proteins embedded in amorphous ice

1992 ◽  
Vol 50 (1) ◽  
pp. 432-433
Author(s):  
Uwe Lücken ◽  
Joachim Jäger
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Membrane Proteins ◽  
Phase Transition Temperature ◽  
Lipid Vesicles ◽  
Freezing Stress ◽  
Amorphous Ice ◽  
Different Temperatures ◽  
Band Pass ◽  
Lipid Polymorphism

TEM imaging of frozen-hydrated lipid vesicles has been done by several groups Thermotrophic and lyotrophic polymorphism has been reported. By using image processing, computer simulation and tilt experiments, we tried to learn about the influence of freezing-stress and defocus artifacts on the lipid polymorphism and fine structure of the bilayer profile. We show integrated membrane proteins do modulate the bilayer structure and the morphology of the vesicles.Phase transitions of DMPC vesicles were visualized after freezing under equilibrium conditions at different temperatures in a controlled-environment vitrification system. Below the main phase transition temperature of 24°C (Fig. 1), vesicles show a facetted appearance due to the quasicrystalline areas. A gradual increase in temperature leads to melting processes with different morphology in the bilayer profile. Far above the phase transition temperature the bilayer profile is still present. In the band-pass-filtered images (Fig. 2) no significant change in the width of the bilayer profile is visible.

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