Author
Claes-Göran Granqvist
Other affiliations: Chalmers University of Technology, Texas A&M University
Bio: Claes-Göran Granqvist is an academic researcher from Uppsala University. The author has contributed to research in topics: Electrochromism & Thin film. The author has an hindex of 73, co-authored 535 publications receiving 31523 citations. Previous affiliations of Claes-Göran Granqvist include Chalmers University of Technology & Texas A&M University.
Papers published on a yearly basis
Papers
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TL;DR: The surface roughness of evaporated CaF2 films was studied by Atomic Force Microscopy as mentioned in this paper, where scaling exponents for kinetic roughening, α and β, were found to be close to 1 and 1 2, respectively.
20 citations
TL;DR: In this paper, the authors used Electrochromic Ni oxide thin films as optically active layers in energy-saving and comfort enhancing smart windows in buildin smart windows, which attracted much interest because of their large potential for applications.
Abstract: Electrochromic Ni oxide thin films attract much interest because of their large potential for applications as optically active layers in energy-saving and comfort enhancing smart windows in buildin ...
20 citations
TL;DR: Transparent conductors (TCs) have numerous and diverse applications for solar energy applications and for energy efficiency as mentioned in this paper, and the largest applications, in terms of area, are based on the fact that the TCs have low infrared emittance and can be used to improve the thermal properties of modern fenestration.
Abstract: Transparent conductors (TCs) have numerous and diverse applications for solar energy applications and for energy efficiency. The largest of these applications, in terms of area, are based on the fact that the TCs have low infrared emittance and can be used to improve the thermal properties of modern fenestration. Depending on whether the TCs are reflecting or not in the near infrared pertinent to solar irradiation, the TCs can serve in 'solar control' or 'low-emittance' windows. Other applications rely on the electrical conductivity of the TCs, which render them useful as current collectors in solar cells and for inserting and extracting electrical charge in electrochromic 'smart windows' capable of combining energy efficiency and indoor comfort in buildings. This paper ventures to give a broad-brush picture of TCs and discuss their properties from the perspective of the radiative properties in our ambience. This approach leads naturally to considerations of spectral selectivity, angular selectivity, and temporal variability of TCs. The spectrally selective materials are thin films based on metals (normally silver) or wide band gap semiconductors with heavy doping (normally based on indium, tin, or zinc). The potential importance of carbon-based TCs is emphasised. Angular dependent TCs, especially those for which the properties are governed by inclined columnar nanostructures, are introduced. A discussion of TC-like materials with thermochromic and electrochromic properties is included, especially with regard to vanadium-dioxide-based films and electrochromic multilayer structures embracing tungsten oxide and nickel oxide.
20 citations
TL;DR: In this article, the WO3-based gas sensors were investigated under UV-light irradiation and at different working temperatures with the object of achieving superior sensitivity and selectivity, and the data were taken in synthetic air, ethanol, nitrogen dioxide, and mixtures of these gases.
Abstract: WO3-based gas sensors were investigated under UV-light irradiation and at different working temperatures with the object of achieving superior sensitivity and selectivity. Resistance fluctuations in the WO3 layer were studied together with dc resistance measurements. The data were taken in synthetic air, ethanol, nitrogen dioxide, and mixtures of these gases. We conclude that UV irradiation can easily be applied to enhance the gas sensing properties of a WO3 layer.
20 citations
TL;DR: In this paper, an inclined columnar microstructure with shape anisotropy governing the depolarization and demagnetization of the electric and magnetic fields was studied.
20 citations
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Journal Article•
28,685 citations
9,432 citations
TL;DR: Graphene has high mobility and optical transparency, in addition to flexibility, robustness and environmental stability as discussed by the authors, and its true potential lies in photonics and optoelectronics, where the combination of its unique optical and electronic properties can be fully exploited, even in the absence of a bandgap, and the linear dispersion of the Dirac electrons enables ultrawideband tunability.
Abstract: The richness of optical and electronic properties of graphene attracts enormous interest. Graphene has high mobility and optical transparency, in addition to flexibility, robustness and environmental stability. So far, the main focus has been on fundamental physics and electronic devices. However, we believe its true potential lies in photonics and optoelectronics, where the combination of its unique optical and electronic properties can be fully exploited, even in the absence of a bandgap, and the linear dispersion of the Dirac electrons enables ultrawideband tunability. The rise of graphene in photonics and optoelectronics is shown by several recent results, ranging from solar cells and light-emitting devices to touch screens, photodetectors and ultrafast lasers. Here we review the state-of-the-art in this emerging field.
6,863 citations
TL;DR: These nontoxic nanomaterials, which can be prepared in a simple and cost-effective manner, may be suitable for the formulation of new types of bactericidal materials.
5,309 citations