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Granqvist, Claes Göran
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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
Öppna denna publikation i ny flik eller fönster >>Advances in electrochromic device technology: Multiple roads towards superior durability
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2019 (Engelska)Ingår i: Surface & Coatings Technology, ISSN 0257-8972, E-ISSN 1879-3347, Vol. 357, s. 619-625Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
Elsevier, 2019
Nationell ämneskategori
Materialkemi
Forskningsämne
Teknisk fysik med inriktning mot fasta tillståndets fysik
Identifikatorer
urn:nbn:se:uu:diva-369882 (URN)10.1016/j.surfcoat.2018.10.048 (DOI)000455691100083 ()
Konferens
61st Annual Technical Conference of the Society-of-Vacuum-Coaters (SVC), MAY 05-10, 2018 , Orlando, FL, USA.
Forskningsfinansiär
EU, Europeiska forskningsrådet, 267234
Tillgänglig från: 2018-12-17 Skapad: 2018-12-17 Senast uppdaterad: 2019-02-05Bibliografiskt granskad
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
Öppna denna publikation i ny flik eller fönster >>Characterization of nanocrystalline-nanoporous nickel oxide thin films prepared by reactive advanced gas deposition
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2019 (Engelska)Ingår i: Materials Chemistry and Physics, ISSN 0254-0584, E-ISSN 1879-3312, Vol. 227, s. 98-104Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
ELSEVIER SCIENCE SA, 2019
Nyckelord
Nickel oxide, Advanced gas deposition, EXAFS, Atomic structure, Gas sensor
Nationell ämneskategori
Materialkemi
Identifikatorer
urn:nbn:se:uu:diva-387223 (URN)10.1016/j.matchemphys.2019.01.058 (DOI)000466617800013 ()
Forskningsfinansiär
EU, FP7, Sjunde ramprogrammet, 267234
Tillgänglig från: 2019-06-25 Skapad: 2019-06-25 Senast uppdaterad: 2019-06-25Bibliografiskt granskad
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
Öppna denna publikation i ny flik eller fönster >>Electrochromic WO3 thin films attain unprecedented durability by potentiostatic pretreatment
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2019 (Engelska)Ingår i: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 7, nr 6, s. 2908-2918Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
ROYAL SOC CHEMISTRY, 2019
Nationell ämneskategori
Materialkemi
Identifikatorer
urn:nbn:se:uu:diva-378529 (URN)10.1039/c8ta09621j (DOI)000457893400054 ()
Forskningsfinansiär
EU, Europeiska forskningsrådet, 267234Vetenskapsrådet, 821-2012-5144Vetenskapsrådet, 2017-00646_9Stiftelsen för strategisk forskning (SSF), RIF14-0053
Tillgänglig från: 2019-03-22 Skapad: 2019-03-22 Senast uppdaterad: 2019-03-22Bibliografiskt granskad
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
Öppna denna publikation i ny flik eller fönster >>Nanotechnology in Eco-Efficient Construction:: materials, processes and applications
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2019 (Engelska)Bok (Refereegranskat)
Ort, förlag, år, upplaga, sidor
Cambridge, UK: Woodhead Publishing Limited, 2019. s. 876 Upplaga: 2
Serie
Woodhead Publishing Series in Civil and Structural Engineering
Nationell ämneskategori
Den kondenserade materiens fysik
Identifikatorer
urn:nbn:se:uu:diva-368945 (URN)978-0-08-102641-0 (ISBN)9780081026427 (ISBN)
Tillgänglig från: 2018-12-10 Skapad: 2018-12-10 Senast uppdaterad: 2019-03-21Bibliografiskt granskad
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
Öppna denna publikation i ny flik eller fönster >>Potentiostatically pretreated electrochromic tungsten oxide films with enhanced durability: Electrochemical processes at interfaces of indium–tin oxide
2019 (Engelska)Ingår i: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 682, s. 163-168Artikel i tidskrift (Refereegranskat) 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.

Nyckelord
Indium-tin oxide, Electrochemistry, Dissolution reaction, Tungsten oxide, Electrochromism
Nationell ämneskategori
Annan materialteknik
Forskningsämne
Teknisk fysik med inriktning mot fasta tillståndets fysik
Identifikatorer
urn:nbn:se:uu:diva-385819 (URN)10.1016/j.tsf.2019.02.027 (DOI)
Tillgänglig från: 2019-06-17 Skapad: 2019-06-17 Senast uppdaterad: 2019-06-19Bibliografiskt granskad
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
Öppna denna publikation i ny flik eller fönster >>Towards Oxide Electronics: a Roadmap
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2019 (Engelska)Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 482, s. 1-93Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
ELSEVIER SCIENCE BV, 2019
Nationell ämneskategori
Materialkemi
Identifikatorer
urn:nbn:se:uu:diva-382804 (URN)10.1016/j.apsusc.2019.03.312 (DOI)000464940900001 ()
Tillgänglig från: 2019-05-08 Skapad: 2019-05-08 Senast uppdaterad: 2019-05-08Bibliografiskt granskad
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)
Öppna denna publikation i ny flik eller fönster >>Transparent Oxides and Related Materials for Electronics and Optics
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2019 (Engelska)Ingår i: Physica Status Solidi (a) applications and materials science, ISSN 1862-6300, E-ISSN 1862-6319, Vol. 216, nr 5Artikel i tidskrift, Editorial material (Övrigt vetenskapligt) Published
Ort, förlag, år, upplaga, sidor
Wiley-VCH Verlagsgesellschaft, 2019
Nationell ämneskategori
Den kondenserade materiens fysik
Identifikatorer
urn:nbn:se:uu:diva-379949 (URN)10.1002/pssa.201900037 (DOI)000460416600015 ()
Tillgänglig från: 2019-03-25 Skapad: 2019-03-25 Senast uppdaterad: 2019-03-25Bibliografiskt granskad
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.
Öppna denna publikation i ny flik eller fönster >>Advances in electrochromic device technology: Multiple roads towards superior durability
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2018 (Engelska)Ingår i: Proceedings SVC, 2018, artikel-id 9 pagesKonferensbidrag, Publicerat paper (Refereegranskat)
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.

Nationell ämneskategori
Materialkemi
Forskningsämne
Teknisk fysik med inriktning mot fasta tillståndets fysik
Identifikatorer
urn:nbn:se:uu:diva-368957 (URN)
Konferens
Society of Vacuum Coaters 61st Annual Technical Conference, May 5-10, 2018, Orlando, FL, USA
Tillgänglig från: 2018-12-10 Skapad: 2018-12-10 Senast uppdaterad: 2019-03-06Bibliografiskt granskad
Garrett, M. J. & Granqvist, C. G. (2018). Basic Sciences and Development: Rethinking Donor Policy (reissueded.). Abingdon, UK & New York, USA: Routledge Revivals
Öppna denna publikation i ny flik eller fönster >>Basic Sciences and Development: Rethinking Donor Policy
2018 (Engelska)Bok (Refereegranskat)
Ort, förlag, år, upplaga, sidor
Abingdon, UK & New York, USA: Routledge Revivals, 2018. s. 180 Upplaga: reissued
Nationell ämneskategori
Den kondenserade materiens fysik Energisystem
Identifikatorer
urn:nbn:se:uu:diva-368944 (URN)978-1-138-61099-6 (ISBN)
Tillgänglig från: 2018-12-10 Skapad: 2018-12-10 Senast uppdaterad: 2019-03-21Bibliografiskt granskad
Qu, H.-Y., Primetzhofer, D., Qiu, Z., Österlund, L., Granqvist, C. G. & Niklasson, G. (2018). Cation/Anion-based electrochemical degradation and rejuvenation of electrochromic nickel oxide films. ChemElectroChem, 5(22), 3548-3556
Öppna denna publikation i ny flik eller fönster >>Cation/Anion-based electrochemical degradation and rejuvenation of electrochromic nickel oxide films
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2018 (Engelska)Ingår i: ChemElectroChem, ISSN 2196-0216, Vol. 5, nr 22, s. 3548-3556Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Ni oxide thin films are widely used in electrochromic (EC) devices with variable throughput of visible light and solarenergy. However, the mechanisms underlying the optical modulation – and its degradation under extended operationand subsequent rejuvenation – are poorly understood especially for Li+-conducting electrolytes. Here, we report a comprehensive study of the EC properties of sputter-deposited Ni oxide films immersed in an electrolyte of LiClO4 in propylene carbonate. Cyclic voltammetry and optical transmittance measurements were used to document degradation and subsequent potentiostatic rejuvenation. X-ray diffraction did not show evidence for accompanying changes in crystallinity, whereas vibrational spectroscopy indicated that degraded films had carbonaceous surface layers. Time-of-flight elastic recoil detection analysis demonstrated that both Li+ and Cl-based ions participate in the electrochromism and its degradation and rejuvenation. A major result was that degradation is associated with a reduced difference in the concentrations of Li+ and Cl based ions in the nickel oxide during extended electrochemical cycling, and rejuvenation of degraded films is achieved by removal of Li+ ions and accumulation of Cl-based anions to regain their initial concentration difference. Our work provides new insights into the use of ion-exchange-based devices incorporating nickel oxide.

Nyckelord
electrochromism, degradation, nickel oxide film, rejuvenation, ToF-ERDA
Nationell ämneskategori
Fysikalisk kemi Den kondenserade materiens fysik Övrig annan teknik
Forskningsämne
Teknisk fysik med inriktning mot fasta tillståndets fysik
Identifikatorer
urn:nbn:se:uu:diva-368950 (URN)10.1002/celc.201800791 (DOI)000450042200027 ()
Forskningsfinansiär
Vetenskapsrådet, 821-2012-5144Vetenskapsrådet, VR-2016-03713Stiftelsen för strategisk forskning (SSF), SSF-RIF14-0053
Tillgänglig från: 2018-12-10 Skapad: 2018-12-10 Senast uppdaterad: 2019-03-19Bibliografiskt granskad
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