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Avendano, Esteban
Alternative names
Publications (5 of 5) Show all publications
Granqvist, C.-G., Green, S. V., Li, S.-Y. -., Mlyuka, N. R., Niklasson, G. & Avendano, E. (2011). Advances in Electrochromics and Thermochromics: Applications to Sustainable Energy. In: Z. Bartul, J. Trenor (Ed.), Advances in Nanotechnology: (pp. 449-460). Hauppauge, NY, USA: Nova Science Publishers, Inc.
Open this publication in new window or tab >>Advances in Electrochromics and Thermochromics: Applications to Sustainable Energy
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2011 (English)In: Advances in Nanotechnology / [ed] Z. Bartul, J. Trenor, Hauppauge, NY, USA: Nova Science Publishers, Inc., 2011, p. 449-460Chapter in book (Refereed)
Place, publisher, year, edition, pages
Hauppauge, NY, USA: Nova Science Publishers, Inc., 2011
National Category
Nano Technology
Identifiers
urn:nbn:se:uu:diva-284163 (URN)
Available from: 2016-04-15 Created: 2016-04-15 Last updated: 2018-08-30
Granqvist, C.-G., Green, S., Li, S., Mlyuka, N., Niklasson, G. A. & Avendaño, E. (2010). Chromogenics for Sustainable Energy: Some Advances in Thermochromics and Electrochromics. Advances in Science and Technology, 75, 55-64
Open this publication in new window or tab >>Chromogenics for Sustainable Energy: Some Advances in Thermochromics and Electrochromics
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2010 (English)In: Advances in Science and Technology, ISSN 1662-0356, Vol. 75, p. 55-64Article in journal (Refereed) Published
Abstract [en]

Chromogenic materials are able to change their optical properties in response to external stimuli such as temperature (in thermochromic materials) and electrical charge insertion (in electrochromic materials). Below we review some recent advances for these types of materials. Specifically we first discuss the limitations of thermochromic VO2 films for energy efficient fenestration and show from calculations that nanocomposites containing VO2 can have superior properties and display high luminous transmittance and large temperature-dependent solar transmittance modulation. Even better results may be found for nanoparticles of VO2:Mg. In the second part of the paper we survey some recent progress for electrochromic devices and show that W oxide films have increased coloration efficiency when some Ni oxide is added. We also present initial results for flexible electrochromic foils produced by roll-to-roll coating and continuous lamination.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-139777 (URN)10.4028/www.scientific.net/AST.75.55 (DOI)
Note

5th FORUM ON NEW MATERIALS PART D

Available from: 2010-12-29 Created: 2010-12-29 Last updated: 2018-08-30Bibliographically approved
Avendano, E., Rensmo, H., Azens, A., Sandell, A., Azevedo, G. d., Siegbahn, H., . . . Granqvist, C. G. (2009). Coloration Mechanism in Proton-Intercalated Electrochromic Hydrated NiOy and Ni1-xVxOy Thin Films. Journal of the Electrochemical Society, 156(8), p132-p138
Open this publication in new window or tab >>Coloration Mechanism in Proton-Intercalated Electrochromic Hydrated NiOy and Ni1-xVxOy Thin Films
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2009 (English)In: Journal of the Electrochemical Society, ISSN 0013-4651, E-ISSN 1945-7111, Vol. 156, no 8, p. p132-p138Article in journal (Refereed) Published
Abstract [en]

Electrochromic (EC) films of nickel oxide, with and without vanadium,   were prepared by reactive dc magnetron sputtering. They were   characterized by electrochemical and optical measurements and studied   by X-ray photoelectron spectroscopy (PES) using synchrotron radiation.  The films were analyzed under as-deposited conditions and after   bleaching/coloration by insertion/extraction of protons from a basic   solution and ensuing charge stabilization. Optical measurements were consistent with a coloration process due to charge-transfer transitions   from Ni2+ to Ni3+ states. The PES measurements showed a higher   concentration of Ni3+ in the colored films. Moreover, two peaks were   present in the O 1s spectra of the bleached film and pointed to contributions of Ni(OH)(2) and NiO. The changes in the O 1s spectra   upon coloration treatment indicate the presence of Ni2O3 in the colored   film and necessitated an extension of the conventional model for the   mechanism of EC coloration. The model involves not only proton   extraction from nickel hydroxide to form nickel oxyhydroxide but also participation of NiO in the coloration process to form Ni2O3.

Keywords
charge exchange, electrochemistry, electrochromism, intercalation compounds, nickel compounds, sputter deposition, synchrotron radiation, thin films, vanadium compounds, X-ray photoelectron spectra
National Category
Condensed Matter Physics Engineering and Technology
Research subject
Solid State Physics
Identifiers
urn:nbn:se:uu:diva-122086 (URN)10.1149/1.3148327 (DOI)000267798500076 ()
Available from: 2011-09-29 Created: 2010-04-06 Last updated: 2017-12-12Bibliographically approved
Granqvist, C.-G., Lansåker, P., Mlyuka, N., Niklasson, G. & Avendano, E. (2009). Progress in Chromogenics: New Results for Electrochromic and Thermochromic Materials and Devices. Solar Energy Materials and Solar Cells, 93(12), 2032-2039
Open this publication in new window or tab >>Progress in Chromogenics: New Results for Electrochromic and Thermochromic Materials and Devices
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2009 (English)In: Solar Energy Materials and Solar Cells, ISSN 0927-0248, E-ISSN 1879-3398, Vol. 93, no 12, p. 2032-2039Article in journal (Refereed) Published
Abstract [en]

Chromogenic device technology can be used to vary the throughput of   visible light and solar energy for windows in buildings as well as for   other see-through applications. The technologies can make use of a   range of "chromic" materials - such as electrochromic, thermochromic,   photochromic, etc - either by themselves or in combinations. The first   part of this paper points at the great energy savings that can be   achieved by use of chromogenic technologies applied in the built   environment, and that these savings can be accomplished jointly with   improved indoor comfort for the users of the building. Some recent data   are presented on a foil-type electrochromic device incorporating   tungsten oxide and nickel oxide. In particular, we consider the   possibilities of controlling the near-infrared transmittance an   optimize this property for specific climates. To that end we discuss   Au-based transparent conductors for electrochromics as well as   high-transmittance thermochromic multilayer films incorporating VO2 and TiO2.

Keywords
Chromogenics, Electrochromic, Thermochromic
National Category
Engineering and Technology
Research subject
Solid State Physics
Identifiers
urn:nbn:se:uu:diva-122119 (URN)10.1016/j.solmat.2009.02.026 (DOI)000271792200002 ()
Available from: 2010-04-06 Created: 2010-04-06 Last updated: 2018-08-30Bibliographically approved
Avendano, E., Azens, A., Niklasson, G. A. & Granqvist, C.-G. (2007). Sputter Deposited Electrochromic Films and Devices Based on These: Progress on nickel-oxide-based films. Materials Science & Engineering: B. Solid-state Materials for Advanced Technology, 138(2), 112-117
Open this publication in new window or tab >>Sputter Deposited Electrochromic Films and Devices Based on These: Progress on nickel-oxide-based films
2007 (English)In: Materials Science & Engineering: B. Solid-state Materials for Advanced Technology, ISSN 0921-5107, E-ISSN 1873-4944, Vol. 138, no 2, p. 112-117Article in journal (Refereed) Published
Abstract [en]

This paper introduces electrochromic (EC) devices, capable of changing their optical absorption under charge insertion/extraction, and some of the required materials. Special attention is given to EC nickel-oxide-based films, for which we discuss sputter deposition and ensuing optical and structural properties. The paper is concluded with some recent results for practical foil-based devices.

Keywords
Electrochromic properties, Nickel oxide, Tungsten oxide, Optical properties, Sputtering, Thin films
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-14394 (URN)10.1016/j.mseb.2005.07.029 (DOI)000248366900003 ()
Available from: 2008-01-30 Created: 2008-01-30 Last updated: 2017-12-11Bibliographically approved
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