Thermochromic Materials Research For Optical Switching Films

G. V. Jorgenson; J. C. Lee

doi:10.1117/12.966280

2 December 1985 Thermochromic Materials Research For Optical Switching Films

G. V. Jorgenson, J. C. Lee

Proceedings Volume 0562, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV; (1985) https://doi.org/10.1117/12.966280
Event: 29th Annual Technical Symposium, 1985, San Diego, United States

Abstract

A dual-ion-beam-sputtering (DIBS) deposition system is used to deposit doped vanadium dioxide (V_1-xM_x0₂), where M is a dopant that decreases the transition temperature (T_t) 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 T_t. 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 V_1-xM_xO₂ temperature (T) is low (T<T_t). At T>T_t, both glazings and walls will reflect the solar infrared.

Citation Download Citation

G. V. Jorgenson and 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); https://doi.org/10.1117/12.966280

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