TY - JOUR
T1 - 3D high-resolution mapping of polarization profiles in thin poly(Vinylidenefluoride-trifluoroethylene) (Pvdf-trfe) films using two thermal techniques
AU - Pham, Cong Duc
AU - Petre, Anca
AU - Berquez, Laurent
AU - Flores-Suárez, Rosaura
AU - Mellinger, Axel
AU - Wirges, Werner
AU - Gerhard, Reimund
PY - 2009/6
Y1 - 2009/6
N2 - In this paper, two non-destructive thermal methods are used in order to determine, with a high degree of accuracy, three-dimensional polarization distributions in thin films (12 μm) of poly(vinylidenefluoride- trifluoroethylene) (PVDF-TrFE). The techniques are the frequency-domain Focused Laser Intensity Modulation Method (FLIMM) and time-domain Thermal-Pulse Tomography (TPT). Samples were first metalized with grid-shaped electrode and poled. 3D polarization mapping yielded profiles which reproduce the electrode-grid shape. The polarization is not uniform across the sample thickness. Significant polarization values are found only at depths beyond 0.5 μm from the sample surface. Both methods provide similar results, TPT method being faster, whereas the FLIMM technique has a better lateral resolution.
AB - In this paper, two non-destructive thermal methods are used in order to determine, with a high degree of accuracy, three-dimensional polarization distributions in thin films (12 μm) of poly(vinylidenefluoride- trifluoroethylene) (PVDF-TrFE). The techniques are the frequency-domain Focused Laser Intensity Modulation Method (FLIMM) and time-domain Thermal-Pulse Tomography (TPT). Samples were first metalized with grid-shaped electrode and poled. 3D polarization mapping yielded profiles which reproduce the electrode-grid shape. The polarization is not uniform across the sample thickness. Significant polarization values are found only at depths beyond 0.5 μm from the sample surface. Both methods provide similar results, TPT method being faster, whereas the FLIMM technique has a better lateral resolution.
KW - Dielectrics
KW - FLIMM
KW - Focused laser intensity modulation method
KW - Polarization
KW - Polymers
KW - Space charges
KW - TPT
KW - Thermal pulse tomography
UR - http://www.scopus.com/inward/record.url?scp=67651183999&partnerID=8YFLogxK
U2 - 10.1109/TDEI.2009.5128505
DO - 10.1109/TDEI.2009.5128505
M3 - Article
AN - SCOPUS:67651183999
SN - 1070-9878
VL - 16
SP - 676
EP - 681
JO - IEEE Transactions on Dielectrics and Electrical Insulation
JF - IEEE Transactions on Dielectrics and Electrical Insulation
IS - 3
M1 - 5128505
ER -