Accession Number:

ADA390060

Title:

Pyrolectric Liquid Crystal Materials for Uncooled IR Sensors

Descriptive Note:

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Report Date:

1999-07-01

Pagination or Media Count:

8.0

Abstract:

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.

Subject Categories:

  • Inorganic Chemistry
  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE