Title :
Poly(vinylidene fluoride/trifluoroethylene) in pyroelectric single-element sensors
Author :
Neumann, N. ; Köhler, R. ; Hofmann, G.
Author_Institution :
Inst. fuer Festkorperelektronik, Tech. Univ. Dresden, Germany
Abstract :
Copolymer thin films can be cast by coating at a thickness of 0.8 μm to 2.5 μm on solid silicon substrates as well as on unrestrained 800 nm thin SiO2/Si3N3 supporting membranes. Poling the P(VDF/TrFE) (poly(vinylidene fluoride/trifluoroethylene)) at about 140 V/μm a high spontaneous polarization can be obtained without any stretching process. Measurements of dielectric constant, dielectric losses, and pyroelectric coefficient confirm the ideal nature of these materials for pyroelectric detectors. Built-up single element detectors are distinguished by a high specific detectivity of 3.5×108 cm-Hz1/2/W at a frequency of 10 Hz
Keywords :
dielectric losses; dielectric polarisation; electrets; electric sensing devices; polymer blends; polymer films; pyroelectric devices; pyroelectricity; P(VDF/TrFE); dielectric constant; dielectric losses; electret; high spontaneous polarization; poly(vinylidene fluoride/trifluoroethylene); pyroelectric coefficient; pyroelectric single-element sensors; Biomembranes; Coatings; Detectors; Dielectric constant; Dielectric loss measurement; Polarization; Pyroelectricity; Semiconductor thin films; Silicon; Solids;
Conference_Titel :
Electrets, 1991. (ISE 7) Proceedings., 7th International Symposium on (Cat. No.91CH3029-6)
Conference_Location :
Berlin
Print_ISBN :
0-7803-0112-9
DOI :
10.1109/ISE.1991.167342
