Song, H.-C. Kim, J.-S. Yoon, S.-J. Jeong, D.-Y. 2024-01-20T21:34:54Z 2024-01-20T21:34:54Z 2021-09-02 2009-04 1225-0562 https://pubs.kist.re.kr/handle/201004/132635 Phase transition in ferroelectric polymer is very interesting behavior and has been widely studied for real device applications, such as actuators and sensors. Through the phase transition, there is structural change resulting in the change of electrical and optical properties. In this study, we fabricated the Febry-Perot interferometer with the thin film of ferroelectric P(VDF-TrFE) 50/50 mol% copolymer, and thermo-optical properties were investigated. The effective thermo-optical coefficient of P(VDF-TrFE) was obtained as 2.3~3.8 ×10-4/K in the ferroelectric temperature region (45°C~65°C) and 6.0×10-4/K in the phase transition temperature region (65°C~85°C), which is a larger than optical silica-fiber and PMMA. The resonance transmission peak of P(VDF-TrFE) with the variation of temperature showed hysteretic variation and the phase transition temperature of the polymer in heating condition was higher than in the cooling condition. The elimination of the hysteretic phase transition of P(VDF-TrFE) is necessary for practical applications of optical devices. Korean Actuators and sensors Cooling conditions Device application Electrical and optical properties Febry-Perot interferometer Ferroelectric polymers Ferroelectric temperature Heating conditions Hysteretic phase transitions Optical silica P copolymers P(VDF-TrFE) copolymer Phase transition temperatures Piezoelectric Resonance transmission Structural change Thermo-optical coefficient Thermo-optical coefficients Thermo-optical properties Copolymerization Damping Electric properties Ferroelectricity Hysteresis Interferometers Interferometry Light transmission Optical properties Piezoelectric transducers Piezoelectricity Silica Stiffness Superconducting transition temperature Phase transitions Characterization of thermo-optical properties of ferroelectric P(VDF-TrFE) copolymer using Febry-Perot interferometer Article 10.3740/MRSK.2009.19.4.228 1 Korean Journal of Materials Research, v.19, no.4, pp.228 - 231 Korean Journal of Materials Research 19 4 228 231 scopus kci ART001336283 2-s2.0-68549092844 Article Actuators and sensors Cooling conditions Device application Electrical and optical properties Febry-Perot interferometer Ferroelectric polymers Ferroelectric temperature Heating conditions Hysteretic phase transitions Optical silica P copolymers P(VDF-TrFE) copolymer Phase transition temperatures Piezoelectric Resonance transmission Structural change Thermo-optical coefficient Thermo-optical coefficients Thermo-optical properties Copolymerization Damping Electric properties Ferroelectricity Hysteresis Interferometers Interferometry Light transmission Optical properties Piezoelectric transducers Piezoelectricity Silica Stiffness Superconducting transition temperature Phase transitions Febry-Perot interferometer P(VDF-TrFE) copolymer Piezoelectric Thermo-optical coefficient