Showing papers by "Claes-Göran Granqvist published in 1986"
TL;DR: In this paper, the authors reviewed work on In2O3:Sn films prepared by reactive e−beam evaporation of In2 O3 with up to 9 mol'% SnO2 onto heated glass.
Abstract: We review work on In2O3:Sn films prepared by reactive e‐beam evaporation of In2O3 with up to 9 mol % SnO2 onto heated glass. These films have excellent spectrally selective properties when the deposition rate is ∼0.2 nm/s, the substrate temperature is ≳150 °C, and the oxygen pressure is ∼5×10−4 Torr. Optimized coatings have crystallite dimensions ≳50 nm and a C‐type rare‐earth oxide structure. We cover electromagnetic properties as recorded by spectrophotometry in the 0.2–50‐μm range, by X‐band microwave reflectance, and by dc electrical measurements. Hall‐effect data are included. An increase of the Sn content is shown to have several important effects: the semiconductor band gap is shifted towards the ultraviolet, the luminous transmittance remains high, the infrared reflectance increases to a high value beyond a certain wavelength which shifts towards the visible, phonon‐induced infrared absorption bands vanish, the microwave reflectance goes up, and the dc resisitivity drops to ∼2×10−4 Ω cm. The corre...
2,124 citations
TL;DR: In this paper, a detailed theoretical model for the optical properties of heavily doped oxide semiconductors was proposed. But the model was applied to In2O3: Sn coatings and used to compute their integrated luminous solar and thermal properties, which yielded single coatings with 78% normal solar transmittance and 20% hemispherical thermal emittance.
38 citations
TL;DR: In this paper, the authors analyzed far-infrared absorption in gas evaporated Al particles and showed that the samples have a fractal structure for length scales below a correlation length.
14 citations
24 Sep 1986
TL;DR: In this article, an electrochromic hydrated nickel oxide films were produced by reactive rf-magnetron sputtering followed by electrochemical treatment in KOH and Spectrophotometry was used to study the modulation of luminous and solar transmittance and assess the durability.
Abstract: Electrochromic hydrated nickel oxide films were produced by reactive rf-magnetron sputtering followed by electrochemical treatment in KOH. Spectrophotometry was used to study the modulation of luminous and solar transmittance and to assess the durability. 15N nuclear reaction analysis showed that coloration occurred upon hydrogen extraction. The investigated coatings appear to have very good properties for smart window applications.
9 citations
24 Sep 1986
TL;DR: In this paper, the authors investigate the radiative heat transfer between blackbody-like surfaces confining an infrared-absorbing gas layer, and find that the gas is able to diminish the heat flux across a 1 cm-thick slab by a factor -0.7 in comparison with the case of a nonabsorbing medium.
Abstract: We investigate the radiative heat transfer between blackbody-like surfaces confining an infrared-absorbing gas layer. Spectrophotometric measurements on selected gases lead us to optimized compositions with sulfur hexafluoride, propyne, and different freons. Theoretically, the gas is able to diminish the radiative heat flux across a 1 cm thick slab by a factor - 0.7 in comparison with the case of a non-absorbing medium. Infrared-absorbing gases seem to offer interesting possibilities for improved transparent thermal insulation of windows.
4 citations