Pyrolectric Liquid Crystal Materials for Uncooled IR Sensors
NAVAL RESEARCH LAB WASHINGTON DC
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We have developed new ferroelectric liquid crystalline materials with large pyroelectric coefficients rho. Data on rho have been obtained using the Byer-Roundy technique that allows a direct determination of rho by ramping the temperature of the sample at a fixed rate. Our results show that the liquid crystalline materials developed by us exhibit rho values in the range of 30-150 nCcrm2K without any applied bias voltage, while rho values of 150-300 nCcm2K have been observed in the presence of bias voltages. We also discuss the figure of merit of these materials for uncooled IR sensing applications.
- Inorganic Chemistry
- Electrical and Electronic Equipment