2 December 1985 Thermochromic Materials Research For Optical Switching Films
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Abstract
A dual-ion-beam-sputtering (DIBS) deposition system is used to deposit doped vanadium dioxide (V1-xMx02), where M is a dopant that decreases the transition temperature (Tt) from that of stoichiometric V02. The objective is to synthesize a material that will passively switch between a heat- transmitting-and a heat-reflecting-state at specific design temperatures. The technique is reactive ion beam sputtering of vanadium and a dopant (separate beams) in a well controlled atmosphere of Ar with a partial pressure of O2. The films are deposited at elevated temperature (>700K) onto glass and sapphire substrates for spectrophotometric evaluation above and below Tt. The longer range goals of this research are to develop the material for: (1) thin film application to building glazings and (2) pigments for opaque wall coatings. The glazings will transmit and the walls will absorb solar energy when the V1-xMxO2 temperature (T) is low (T<Tt). At T>Tt, both glazings and walls will reflect the solar infrared.
© (1985) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
G. V. Jorgenson, G. V. Jorgenson, J. C. Lee, J. C. Lee, "Thermochromic Materials Research For Optical Switching Films", Proc. SPIE 0562, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV, (2 December 1985); doi: 10.1117/12.966280; https://doi.org/10.1117/12.966280
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