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考虑1-3型垂直异质铁电P(VDF-TrFE)基复合薄膜结构,利用非线性的热力学理论分析和讨论了平面外应变对复合薄膜电热性能的调控作用.结果表明,在施加的垂直电场下,平面外应变可以有效地调控电极化、热释电系数、绝热温差等铁电、电热性能.通过合理的调控平面外应变可以在很大的温度区域范围内获得比纯平面外延薄膜结构更高的绝热温差.研究结果预示着垂直异质P(VDF-TrFE)基复合薄膜结构在一定的工作温度范围内具有优异的电热性能,在微电源、光通信二极管、红外传感器等微型元件方面有着广泛的应用前景.
Considering the structure of 1-3 type perpendicular heterogenous ferroelectric P (VDF-TrFE) composite films, the non-linear thermodynamic theory is used to analyze and discuss the effect of out-of-plane strain on the electric and thermal properties of the composite films. The results show that in the vertical Under the electric field, the out-of-plane strain can effectively control the ferroelectric and electrothermal properties such as electrode polarization, pyroelectric coefficient, adiabatic temperature difference, etc. By adjusting the out-of-plane strain reasonably, it is better than the pure planar epitaxial film structure in a wide temperature range Higher thermal insulation temperature.The results show that the perpendicular heterogeneous P (VDF-TrFE) based composite thin film structure has excellent electric and thermal performance in a certain operating temperature range, and the micro-power, optical communication diodes, infrared sensors and other micro-components Has a wide range of applications.