Deposition and characterization of graphite-black coating for absolute pyroelectric detectors

• Published in: Infrared physics & technology Vol. 45; no. 4; pp. 273 - 279
• Main Authors: Mellouki, I., Touayar, O., Ktari, T., Yacoubi, N.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-07-2004; Elsevier
• Subjects: Cross-disciplinary physics: materials science; rheology; Depositing; Electrical heating; Electrically pyroelectric detector; Exact sciences and technology; Graphite-black; Materials science; Methods of deposition of films and coatings; film growth and epitaxy; Physics; Reflectance; Spin-on coating; Spray coating techniques; Depositing; Electrically pyroelectric detector; Spin-on coating; Electrical heating; Graphite-black; Reflectance; Reflectivity; Electric heating; Electrical measurement; Pyroelectric detectors; Manufacturing processes; Graphite; Experimental study; Spectrophotometry; Pyroelectric devices; Deposition process
• ISSN: 1350-4495; 1879-0275
• DOI: 10.1016/j.infrared.2003.11.010

We describe the process of depositing graphite-black on thin pyroelectric detector substrates and compare this with previous work on gold-black coating, documented in the literature. Spectrophotometric measurements indicate that graphite-coating reflectance, at normal incidence, varies by less than 5% from 250 to 2500 nm. The electrical characterization, indicates that graphite coating can be used for the radiant-electrical calibration of pyroelectric detectors. Measurements with electrical heating made on graphite resistance, indicate that the permissible absolute power that could measure the pyroelectric detector could measure, is a function of the graphite thickness.