We have prepared lanthanum strontium cobalt oxide (La0.50Sr0.50CoO3; LSCO 50/50) and lanthanum strontium cobalt nickel oxide (La0.50Sr0.50Co0.50Ni0.50O3; LSCNO) as candidate transparent electrodes for use in a shutter-based infrared sensor protection device. The shutter device requires that the electrode be transparent (80% transmission) and have moderate sheet resistance (300 Ω/sq.). Because of the effects of film thickness on intrinsic material properties, such as resistivity and extinction coefficient, and simple engineering issues (i.e., the relationship between film thickness, resistance and transmission), films of various thicknesses were prepared to achieve an optimal balance of electrical and optical performance. van der Pauw measurements and FTIR spectroscopy were used to study thin film properties. The best LSCO films prepared demonstrated electrical (438 Ω/sq.) and optical (68% transmission at 8 μm) properties that did not meet the target property goals for this application. However, the LSCNO films (of optimal thickness) offered performance (323 Ω/sq. and 73% transmission) close to the device requirements.


Mechanical and Aerospace Engineering


United States. Defense Advanced Research Projects Agency

Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 2001 Materials Research Society, All rights reserved.

Publication Date

01 Jan 2001