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: Des mesures optiques montrent qu'une couche mince In 2 O 3 : Sn dont the conductivite est optimisee ne presente aucun effet d'electrochromisme.
Abstract: Des mesures optiques montrent qu'une couche mince In 2 O 3 :Sn dont la conductivite est optimisee ne presente aucun effet d'electrochromisme
24 citations
TL;DR: The KLJN protocol as mentioned in this paper is based on the Kirchhoff-law-Johnson-noise (KLJN) key exchange protocol, which is an unclonable system for credit/debit card chip authentication and payment.
Abstract: The statistical-physics-based Kirchhoff-law–Johnson-noise (KLJN) key exchange offers a new and simple unclonable system for credit/debit card chip authentication and payment. The key exchange, the authentication and the communication are unconditionally secure so that neither mathematics- nor statistics-based attacks are able to crack the scheme. The ohmic connection and the short wiring lengths between the chips in the card and the terminal constitute an ideal setting for the KLJN protocol, and even its simplest versions offer unprecedented security and privacy for credit/debit card chips and applications of physical unclonable functions (PUFs).
24 citations
TL;DR: In this article, the authors measured the transmittance and reflectance of W oxide and oxyfluoride films in the 0.4-1 μm wavelength range using a newly developed instrument and found that the ratio between diffuse and total optical response was <0.2% for transmittances and <1% for the reflectance irrespective of the electrochromic absorption level.
Abstract: Films of W oxide and oxyfluoride were made by reactive sputtering, and electrochromic absorption modulation was obtained by subsequent electrochemical Li intercalation. Total and diffuse transmittance and reflectance were measured in the 0.4–1 μm wavelength range using a newly developed instrument. The ratio between diffuse and total optical response was <0.2% for the transmittance and <1% for the reflectance irrespective of the electrochromic absorption level. These magnitudes of the scattering are acceptable for practical smart windows applications and lend credence to a description of electrochromism in terms of localized absorption centers. Vector perturbation theory for light scattering by a film with rough interfaces could be reconciled with the data, assuming uncorrelated roughness.
24 citations
TL;DR: In this paper, Nioxide-based thin films were produced by reactive direct-current magnetron sputtering and were characterized by X-ray diffraction and Rutherford backscattering spectroscopy.
Abstract: : Ni-oxide-based thin films were produced by reactive direct-current magnetron sputtering and were characterized by X-ray diffraction and Rutherford backscattering spectroscopy. Intercalati ...
23 citations
TL;DR: In this article, a series of titanium oxide films were prepared by reactive DC magnetron sputtering onto SnO2:F coated glass substrates, and the structure displayed penniform features with a clear dependence on F. The O-2/Ar gas flow ratio was kept at a constant value Gamma during the deposition.
23 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