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Granqvist, Claes Göran
Alternative names
Publications (10 of 528) Show all publications
Granqvist, C. G., Arvizu, M. A., Qu, H.-Y., Wen, R.-T. & Niklasson, G. (2019). Advances in electrochromic device technology: Multiple roads towards superior durability. Paper presented at 61st Annual Technical Conference of the Society-of-Vacuum-Coaters (SVC), MAY 05-10, 2018 , Orlando, FL, USA.. Surface & Coatings Technology, 357, 619-625
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2019 (English)In: Surface & Coatings Technology, ISSN 0257-8972, E-ISSN 1879-3347, Vol. 357, p. 619-625Article in journal (Refereed) Published
Abstract [en]

Most electrochromic (EC) devices must have a service lifetime of many years, and this is particularly so for“smart windows” in buildings with good energy efficiency and indoor comfort. The central part of oxide-based EC devices contains thin films based on W oxide and Ni oxide together with an interposed electrolyte. Depending on operating conditions, these films may show degradation at a slower or faster pace, and means to prevent or reverse this phenomenon, or as a minimum allow reliable lifetime prediction, have been sought ever since the beginnings of EC technology. Here we survey recent endeavors related to EC films of W oxide and Ni oxide and show that (i) electrochemical pretreatment of films in a liquid electrolyte can significantly improve durability, (ii)electrochemical posttreatment in a liquid electrolyte can rejuvenate degraded films, (iii) mixed oxides can have better durability and optical performance than corresponding pure oxides, and (iv) lifetime prediction is possible.

Place, publisher, year, edition, pages
Elsevier, 2019
National Category
Materials Chemistry
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
urn:nbn:se:uu:diva-369882 (URN)10.1016/j.surfcoat.2018.10.048 (DOI)000455691100083 ()
Conference
61st Annual Technical Conference of the Society-of-Vacuum-Coaters (SVC), MAY 05-10, 2018 , Orlando, FL, USA.
Funder
EU, European Research Council, 267234
Available from: 2018-12-17 Created: 2018-12-17 Last updated: 2019-02-05Bibliographically approved
Cindemir, U., Topalian, Z., Granqvist, C. G., Österlund, L. & Niklasson, G. (2019). Characterization of nanocrystalline-nanoporous nickel oxide thin films prepared by reactive advanced gas deposition. Materials Chemistry and Physics, 227, 98-104
Open this publication in new window or tab >>Characterization of nanocrystalline-nanoporous nickel oxide thin films prepared by reactive advanced gas deposition
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2019 (English)In: Materials Chemistry and Physics, ISSN 0254-0584, E-ISSN 1879-3312, Vol. 227, p. 98-104Article in journal (Refereed) Published
Abstract [en]

Nanocrystalline-nanoporous Ni oxide is of much interest for gas sensors and other applications. Reactive advanced gas deposition (AGD) stands out as a particularly promising technique for making thin films of this material owing to the techniques ability to separate between the growth of individual nanoparticles and their subsequent deposition to create a consolidated material on a substrate. Here we report on the characterization of Ni oxide films, made by reactive AGD, by several methods. X-ray diffractometry showed that the films had a face centered cubic NiO structure, and scanning electron microscopy indicated a compact nanoparticulate composition. X-ray photoelectron spectroscopy showed the presence of Ni3+ and demonstrated that these states became less prominent upon heat treatment in air. Extended x-ray absorption fine structure analysis elucidated the local atomic structure; in particular, data on interatomic distances and effects of annealing on local disorder showed that the Ni oxide nanoparticles crystallize upon annealing while maintaining their nanoparticle morphology, which is a crucial feature for reproducible fabrication of Ni oxide thin films for gas sensors. Importantly, several techniques demonstrated that grain growth remained modest for annealing temperatures as high as 400 degrees C for 1700-nm-thick films. The present article is a sequel to an earlier one [U. Cindemir et al., Sensors and Actuators B 242 (2017) 132-139] in which we reported on fluctuation-enhanced and conductometric gas sensing with Ni oxide films prepared by AGD.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA, 2019
Keywords
Nickel oxide, Advanced gas deposition, EXAFS, Atomic structure, Gas sensor
National Category
Materials Chemistry
Identifiers
urn:nbn:se:uu:diva-387223 (URN)10.1016/j.matchemphys.2019.01.058 (DOI)000466617800013 ()
Funder
EU, FP7, Seventh Framework Programme, 267234
Available from: 2019-06-25 Created: 2019-06-25 Last updated: 2019-06-25Bibliographically approved
Arvizu, M. A., Qu, H.-Y., Cindemir, U., Qiu, Z., Rojas González, E. A., Primetzhofer, D., . . . Niklasson, G. (2019). Electrochromic WO3 thin films attain unprecedented durability by potentiostatic pretreatment. Journal of Materials Chemistry A, 7(6), 2908-2918
Open this publication in new window or tab >>Electrochromic WO3 thin films attain unprecedented durability by potentiostatic pretreatment
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2019 (English)In: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 7, no 6, p. 2908-2918Article in journal (Refereed) Published
Abstract [en]

Electrochromic windows and glass facades are able to impart energy efficiency jointly with indoor comfort and convenience. Long-term durability is essential for practical implementation of this technology and has recently attracted broad interest. Here we show that a simple potentiostatic pretreatment of sputterdeposited thin films of amorphous WO3-the most widely studied electrochromic material-can yield unprecedented durability for charge exchange and optical modulation under harsh electrochemical cycling in a Li-ion-conducting electrolyte and effectively evades harmful trapping of Li. The pretreatment consisted of applying a voltage of 6.0 V vs. Li/Li+ for several hours to a film backed by a transparent conducting In2O3: Sn layer. Associated compositional and structural modifications were probed by several techniques, and improved durability was associated with elemental intermixing at the WO3/ITO and ITO/glass boundaries as well as with carbonaceous solid-electrolyte interfacial layers on the WO3 films. Our work provides important new insights into long-term durability of ion-exchange-based devices.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY, 2019
National Category
Materials Chemistry
Identifiers
urn:nbn:se:uu:diva-378529 (URN)10.1039/c8ta09621j (DOI)000457893400054 ()
Funder
EU, European Research Council, 267234Swedish Research Council, 821-2012-5144Swedish Research Council, 2017-00646_9Swedish Foundation for Strategic Research , RIF14-0053
Available from: 2019-03-22 Created: 2019-03-22 Last updated: 2019-03-22Bibliographically approved
Pacheco-Torgal, F., Diamanti, M. V., Nazari, A., Granqvist, C. G., Pruna, A. & Amirkhanian, S. (2019). Nanotechnology in Eco-Efficient Construction:: materials, processes and applications (2ed.). Cambridge, UK: Woodhead Publishing Limited
Open this publication in new window or tab >>Nanotechnology in Eco-Efficient Construction:: materials, processes and applications
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2019 (English)Book (Refereed)
Place, publisher, year, edition, pages
Cambridge, UK: Woodhead Publishing Limited, 2019. p. 876 Edition: 2
Series
Woodhead Publishing Series in Civil and Structural Engineering
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:uu:diva-368945 (URN)978-0-08-102641-0 (ISBN)9780081026427 (ISBN)
Available from: 2018-12-10 Created: 2018-12-10 Last updated: 2019-03-21Bibliographically approved
Qu, H.-Y., Rojas González, E. A., Granqvist, C. G. & Niklasson, G. (2019). Potentiostatically pretreated electrochromic tungsten oxide films with enhanced durability: Electrochemical processes at interfaces of indium–tin oxide. Thin Solid Films, 682, 163-168
Open this publication in new window or tab >>Potentiostatically pretreated electrochromic tungsten oxide films with enhanced durability: Electrochemical processes at interfaces of indium–tin oxide
2019 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 682, p. 163-168Article in journal (Refereed) Published
Abstract [en]

Recent work has shown that electrochromic WO3 films, backed by In2O3:Sn (ITO) and immersed in a lithium-ion-conducting electrolyte, can attain unprecedented electrochemical cycling durability after potentiostatic pretreatment at high voltage. Here we demonstrate that this intriguing feature is associated with changes in the properties of the ITO film. Specifically, we studied thin films of ITO and WO3/ITO immersed in an electrolyte of LiClO4 in propylene carbonate at potentials up to 6.0 V vs. Li/Li+ by cyclic voltammetry and impedance spectroscopy and present evidence that electrochemical reactions occur under these conditions. X-ray photoemission spectroscopy indicated that the ITO film was partly dissolved at high voltages and that the dissolution reaction promoted diffusion of In and Sn into the WO3 film.

Keywords
Indium-tin oxide, Electrochemistry, Dissolution reaction, Tungsten oxide, Electrochromism
National Category
Other Materials Engineering
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
urn:nbn:se:uu:diva-385819 (URN)10.1016/j.tsf.2019.02.027 (DOI)
Available from: 2019-06-17 Created: 2019-06-17 Last updated: 2019-06-19Bibliographically approved
Österlund, L., Mattsson, A., Ji, Y.-X. -., Niklasson, G. A. & Granqvist, C.-G. (2019). Spectrally selective nanocoatings with synergistically enhanced photocatalytic and solar light modulation properties. In: : . Paper presented at E-MRS Spring Meeting 2019. IUMRS-ICAM International Conference on Advanced Materials, May 27-31, 2019, Nice, France..
Open this publication in new window or tab >>Spectrally selective nanocoatings with synergistically enhanced photocatalytic and solar light modulation properties
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2019 (English)Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

Spectrally selective nanocoatings that exhibit synergistically enhanced solar light modulation, luminous transmittance and catalytic properties can be made by combining dielectric film stacks with complementary optical and structural properties. Here we show two case studies:

1)TiO2/VO2 luminous transparent bilayers that exhibits enhanced near-infrared light absorption and heats the TiO2 film by up to ~ 30°C  resulting in ~ 2-fold increase of the photocatalytic reaction rate. The TiO2/VO2 bilayer stack exhibits anti-reflective properties, and enhanced solar light modulation (∼ 9%) compared to VO2, and ∼ 20 times% increased solar absorptance compared to TiO2. In addition the TiO2 chemically protects the VO2 layer avoiding oxidation to vanadium pentoxide. 2)TiO2/TiAlN solar absorber bilayers that yield an almost ~ 10-fold enhancement of the quantum yield for acetaldehyde removal (on par with state-of-the-art, heterojunction photocatalysts), and an associated temperature rise ~120 °C.

National Category
Engineering and Technology Physical Sciences
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
urn:nbn:se:uu:diva-395216 (URN)
Conference
E-MRS Spring Meeting 2019. IUMRS-ICAM International Conference on Advanced Materials, May 27-31, 2019, Nice, France.
Available from: 2019-10-15 Created: 2019-10-15 Last updated: 2019-10-21Bibliographically approved
Coll, M., Fontcuberta, J., Althammer, M., Bibes, M., Boschker, H., Calleja, A., . . . Granozio, F. M. (2019). Towards Oxide Electronics: a Roadmap. Applied Surface Science, 482, 1-93
Open this publication in new window or tab >>Towards Oxide Electronics: a Roadmap
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2019 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 482, p. 1-93Article in journal (Refereed) Published
Abstract [en]

At the end of a rush lasting over half a century, in which CMOS technology has been experiencing a constant and breathtaking increase of device speed and density, Moore's law is approaching the insurmountable barrier given by the ultimate atomic nature of matter. A major challenge for 21st century scientists is finding novel strategies, concepts and materials for replacing silicon-based CMOS semiconductor technologies and guaranteeing a continued and steady technological progress in next decades. Among the materials classes candidate to contribute to this momentous challenge, oxide films and heterostructures are a particularly appealing hunting ground. The vastity, intended in pure chemical terms, of this class of compounds, the complexity of their correlated behaviour, and the wealth of functional properties they display, has already made these systems the subject of choice, worldwide, of a strongly networked, dynamic and interdisciplinary research community. Oxide science and technology has been the target of a wide four-year project, named Towards Oxide-Based Electronics (TO-BE), that has been recently running in Europe and has involved as participants several hundred scientists from 29 EU countries. In this review and perspective paper, published as a final deliverable of the TO-BE Action, the opportunities of oxides as future electronic materials for Information and Communication Technologies ICT and Energy are discussed. The paper is organized as a set of contributions, all selected and ordered as individual building blocks of a wider general scheme. After a brief preface by the editors and an introductory contribution, two sections follow. The first is mainly devoted to providing a perspective on the latest theoretical and experimental methods that are employed to investigate oxides and to produce oxide-based films, heterostructures and devices. In the second, all contributions are dedicated to different specific fields of applications of oxide thin films and heterostructures, in sectors as data storage and computing, optics and plasmonics, magnonics, energy conversion and harvesting, and power electronics.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV, 2019
National Category
Materials Chemistry
Identifiers
urn:nbn:se:uu:diva-382804 (URN)10.1016/j.apsusc.2019.03.312 (DOI)000464940900001 ()
Available from: 2019-05-08 Created: 2019-05-08 Last updated: 2019-05-08Bibliographically approved
Ginley, D., Granqvist, C. G., Hosono, H., Kamiya, T. & Kiriakidis, G. (2019). Transparent Oxides and Related Materials for Electronics and Optics. Physica Status Solidi (a) applications and materials science, 216(5)
Open this publication in new window or tab >>Transparent Oxides and Related Materials for Electronics and Optics
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2019 (English)In: Physica Status Solidi (a) applications and materials science, ISSN 1862-6300, E-ISSN 1862-6319, Vol. 216, no 5Article in journal, Editorial material (Other academic) Published
Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2019
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:uu:diva-379949 (URN)10.1002/pssa.201900037 (DOI)000460416600015 ()
Available from: 2019-03-25 Created: 2019-03-25 Last updated: 2019-03-25Bibliographically approved
Granqvist, C. G., Arvizu, M. A., Qu, H.-Y., Wen, R.-T. & Niklasson, G. (2018). Advances in electrochromic device technology: Multiple roads towards superior durability. In: Proceedings SVC: . Paper presented at Society of Vacuum Coaters 61st Annual Technical Conference, May 5-10, 2018, Orlando, FL, USA. , Article ID 9 pages.
Open this publication in new window or tab >>Advances in electrochromic device technology: Multiple roads towards superior durability
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2018 (English)In: Proceedings SVC, 2018, article id 9 pagesConference paper, Published paper (Refereed)
Abstract [en]

Most electrochromic (EC) devices must have a service lifetime of many years, and this is particularly so for “smart windows” in buildings with good energy efficiency and indoor comfort. The central part of oxide-based EC devices contains thin films based on W oxide and Ni oxide together with an interposed electrolyte. Depending on operating conditions, these films may show degradation at a slower or faster pace, and means to prevent or reverse this phenomenon, or as a minimum allow reliable lifetime prediction, have been sought ever since the beginnings of EC technology. Here we survey recent endeavors related to EC films of W oxide and Ni oxide and show that (i) electrochemical pretreatment of films in a liquid electrolyte can significantly improve durability, (ii) electrochemical posttreatment in a liquid electrolyte can rejuvenate degraded films, (iii) mixed oxides can have better durability and optical performance than corresponding pure oxides, and (iv) lifetime prediction is possible.

National Category
Materials Chemistry
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
urn:nbn:se:uu:diva-368957 (URN)
Conference
Society of Vacuum Coaters 61st Annual Technical Conference, May 5-10, 2018, Orlando, FL, USA
Available from: 2018-12-10 Created: 2018-12-10 Last updated: 2019-03-06Bibliographically approved
Garrett, M. J. & Granqvist, C. G. (2018). Basic Sciences and Development: Rethinking Donor Policy (reissueded.). Abingdon, UK & New York, USA: Routledge Revivals
Open this publication in new window or tab >>Basic Sciences and Development: Rethinking Donor Policy
2018 (English)Book (Refereed)
Place, publisher, year, edition, pages
Abingdon, UK & New York, USA: Routledge Revivals, 2018. p. 180 Edition: reissued
National Category
Condensed Matter Physics Energy Systems
Identifiers
urn:nbn:se:uu:diva-368944 (URN)978-1-138-61099-6 (ISBN)
Available from: 2018-12-10 Created: 2018-12-10 Last updated: 2019-03-21Bibliographically approved
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