Title :
The Influence of Ultraviolet Irradiation on Polarization Fatigue in Ferroelectric Polymer Films
Author :
Fu, Shao Song ; Yu, Hao ; Luo, Xiao Ya ; Jiang, Yu Long ; Zhu, Guo Dong
Author_Institution :
Dept. of Mater. Sci., Fudan Univ., Shanghai, China
Abstract :
In this letter, we report the influence of ultraviolet (UV) irradiation on electrical fatigue in ferroelectric polymers. Experiments indicate that ferroelectric polymer films exposed to UV irradiation show degraded fatigue endurance. However, simultaneous application of UV light and bias voltage (Vbias) can partially recover the electrical polarization in fatigued films. In our present work, a combination of UV (365 nm) and Vbias ( -51 V) has resulted in the restoration of remanent polarization up to 85.3% of its original value in 1200 s. The influence of Vbias on polarization restoration is also reported. UV effects are explained based on the understanding of charge influence on ferroelectric fatigue.
Keywords :
dielectric polarisation; ferroelectric thin films; ferroelectricity; polymer films; ultraviolet radiation effects; UV effects; UV light; bias voltage; electrical fatigue; electrical polarization; fatigue endurance; ferroelectric fatigue; ferroelectric polymer films; polarization fatigue; remanent polarization restoration; time 1200 s; ultraviolet irradiation; voltage -51 V; wavelength 365 nm; Acceleration; Electron traps; Fatigue; Photonic band gap; Polymers; Radiation effects; Switches; Ferroelectric polymer; polarization fatigue; polarization restoration; ultraviolet (UV) irradiation;
Journal_Title :
Electron Device Letters, IEEE
DOI :
10.1109/LED.2011.2172912
