The influence of processing conditions on the morphology and thermochromic properties of vanadium oxide films

Minch, Robert; Moonoosawmy, Kevin R.; Solterbeck, C.‐H.; Es‐Souni, M.

doi:10.1016/j.tsf.2014.02.049

Cited by 15 publications

(19 citation statements)

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“…The situation is further complicated as doping with high valency metals also impacts upon the thermochromic efficiency, usually in a detrimental manner [179][180][181][182][183]. The use of polymer templates and surfactants has also been shown to change the surface microstructure and thus the thermochromic efficiency [176,184].…”

Section: Improving Thermochromic Efficiencymentioning

confidence: 99%

Thin Films for Advanced Glazing Applications

et al. 2016

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Functional thin films provide many opportunities for advanced glazing systems. This can be achieved by adding additional functionalities such as self-cleaning or power generation, or alternately by providing energy demand reduction through the management or modulation of solar heat gain or blackbody radiation using spectrally selective films or chromogenic materials. Self-cleaning materials have been generating increasing interest for the past two decades. They may be based on hydrophobic or hydrophilic systems and are often inspired by nature, for example hydrophobic systems based on mimicking the lotus leaf. These materials help to maintain the aesthetic properties of the building, help to maintain a comfortable working environment and in the case of photocatalytic materials, may provide external pollutant remediation. Power generation through window coatings is a relatively new idea and is based around the use of semi-transparent solar cells as windows. In this fashion, energy can be generated whilst also absorbing some solar heat. There is also the possibility, in the case of dye sensitized solar cells, to tune the coloration of the window that provides unheralded external aesthetic possibilities. Materials and coatings for energy demand reduction is highly desirable in an increasingly energy intensive world. We discuss new developments with low emissivity coatings as the need to replace scarce indium becomes more apparent. We go on to discuss thermochromic systems based on vanadium dioxide films. Such systems are dynamic in nature and present a more sophisticated and potentially more beneficial approach to reducing energy demand than static systems such as low emissivity and solar control coatings. The ability to be able to tune some of the material parameters in order to optimize the film performance for a given climate provides exciting opportunities for future technologies. In this article, we review recent progress and challenges in these areas and provide a perspective for future trends and developments.

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Section: Improving Thermochromic Efficiencymentioning

confidence: 99%

Thin Films for Advanced Glazing Applications

et al. 2016

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“…Among these inorganic materials, vanadium oxide thin films have been gained great interests, owing to their multi-color electrochromic behaviors [10]. V 2 O 5 thin films can be fabricated using either physical vapor deposition techniques (such as magnetron sputtering [11], pulsed laser deposition [12]), or solution-based techniques (such as sol-gel [13], spin coating [14], and electrochemical deposition). Structural and EC properties of the V 2 O 5 thin films depend not only on the deposition parameters but also post-annealing processes.…”

Section: Introductionmentioning

confidence: 99%

Effect of post-annealing on structural and electrochromic properties of Mo-doped V2O5 thin films

Wei

Zhang

Cao

et al. 2015

J Sol-Gel Sci Technol

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The effect of post-annealing on the structural and electrochromic properties of the Mo-doped V 2 O 5 thin films was investigated in this paper. With varying the annealing temperature, the interlayer distance is increased from 1.16 (as-deposited) to 1.38 nm (annealing at 250°C), and the enlarged interlayer spacing would facilitate ion movement in between the interlayers inside the electrochromic matrix. Therefore, both the optical modulation and color efficiency of the Mo-doped V 2 O 5 thin films are enhanced after appropriate post-annealing treatment. Our results demonstrate that Mo-doped V 2 O 5 material is one of the promising candidates to be used in multi-color electrochromic devices. Graphical Abstract The ability to modulate optical transmittance of the Mo-doped V 2 O 5 thin films is greatly enhanced by means of the larger interlayer distance after annealing.

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“…Like all solution phase deposition methods, synthesis condition can modify the film properties. In this regard, the impact of processing parameters has been examined repeatedly, including the reducing atmosphere, drying and annealing temperature and aging of the precursor sol [92][93][94].…”

Section: Vo(acac) 2 Precursormentioning

confidence: 99%

“…In the following year, Minch's group [92] examined the effect of gel drying temperature after coating process. Fig.…”

Section: Vo(acac) 2 Precursormentioning

confidence: 99%

“…Nanoporous equiaxed VO 2 and self-organized hemispherical V 2 O 5 discs were obtained when the gel drying temperature was much lower and higher than the solvent boiling point, correspondingly. The presence of V 2 O 5 microstructure can be explained by the fact that the higher evaporation rate of solvent leads to oxygen absorption from the surrounding atmosphere [92]. This factor is probably responsible for the oxidation of V 4 þ to V 5 þ .…”

Section: Vo(acac) 2 Precursormentioning

confidence: 99%

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