TY - JOUR
T1 - Polyurea spin-coated thin films
T2 - Pyro- and piezoelectric properties and application to infrared sensors
AU - Morimoto, Masahiro
AU - Koshiba, Yasuko
AU - Misaki, Masahiro
AU - Ishida, Kenji
N1 - Publisher Copyright:
© 2015 The Japan Society of Applied Physics.
PY - 2015/4/1
Y1 - 2015/4/1
N2 - We have investigated the pyro- and piezoelectric properties of polyurea spin-coated films with thermal and chemical stability and their performance as infrared sensors. The piezoelectric coefficient d33 was measured by a laser Doppler vibrometer to be 23.5 pC/N. This coefficient increased with the poling electric field up to around 75MV/m, suggesting that the polyurea dipole is aligned by applying an electric field greater than 75MV/m. When a triangular thermal wave was applied, a square-wave pyroelectric current was observed and the pyroelectric coefficient measured to be 5.11 μC/(m2·K). The infrared sensor performance of the polyurea thin film was examined by measuring the voltage sensitivity to infrared irradiation. The obtained result of 70.4V/W at 1Hz is consistent with the results calculated from the measured pyroelectric coefficient. Our findings suggest that the performance of the sensor may be improved by increasing the pyroelectric coefficient of the polyurea films.
AB - We have investigated the pyro- and piezoelectric properties of polyurea spin-coated films with thermal and chemical stability and their performance as infrared sensors. The piezoelectric coefficient d33 was measured by a laser Doppler vibrometer to be 23.5 pC/N. This coefficient increased with the poling electric field up to around 75MV/m, suggesting that the polyurea dipole is aligned by applying an electric field greater than 75MV/m. When a triangular thermal wave was applied, a square-wave pyroelectric current was observed and the pyroelectric coefficient measured to be 5.11 μC/(m2·K). The infrared sensor performance of the polyurea thin film was examined by measuring the voltage sensitivity to infrared irradiation. The obtained result of 70.4V/W at 1Hz is consistent with the results calculated from the measured pyroelectric coefficient. Our findings suggest that the performance of the sensor may be improved by increasing the pyroelectric coefficient of the polyurea films.
UR - http://www.scopus.com/inward/record.url?scp=84926378116&partnerID=8YFLogxK
U2 - 10.7567/JJAP.54.04DK13
DO - 10.7567/JJAP.54.04DK13
M3 - 学術論文
AN - SCOPUS:84926378116
SN - 0021-4922
VL - 54
JO - Japanese Journal of Applied Physics
JF - Japanese Journal of Applied Physics
IS - 4
M1 - 04DK13
ER -