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Electrical Field Driven Structural Evolutions of Polymorphic Nanodomains in Ferroelectric Ba(Zr,Ti)O3 Films
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2022-07-20 , DOI: 10.1002/aelm.202200465 Yuhang Ren 1, 2 , Onur Kurt 1 , Hongbo Cheng 3 , Tong Le 1, 2 , Steve Greenbaum 1, 2 , Jun Ouyang 1, 3
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2022-07-20 , DOI: 10.1002/aelm.202200465 Yuhang Ren 1, 2 , Onur Kurt 1 , Hongbo Cheng 3 , Tong Le 1, 2 , Steve Greenbaum 1, 2 , Jun Ouyang 1, 3
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Film ferroelectrics possessing large breakdown strength and high energy density hold great promise for compact and efficient power systems. However, it is still unclear how the evolution of their underlying structure engenders their defining energy storage properties. Here, the electrical field-driven structural evolutions of polymorphic nanodomains in 1400 nm ferroelectric Ba(Zr0.2Ti0.8)O3 (BZT) films by optical second-harmonic generation, along with X-ray diffraction and transmission electron microscopy analyses are revealed. The BZT films transform between a remnant state to a charged state with an improved energy efficiency (≈90%) and an excellent fatigue endurance (virtually no loss in energy efficiency and ≈25% loss in stored energy after 107 bipolar cycles @ 1.5 MV cm−1 maximum electric field). Phase separation is significantly increased after charge-discharge cycles. The performance is attributed to ultra-adaptive polymorphic nanodomains, which effectively accommodate the concurring elastic and electrical stress fields during electrical switching.
中文翻译：
电场驱动铁电 Ba(Zr,Ti)O3 薄膜中多晶型纳米畴的结构演化
具有大击穿强度和高能量密度的薄膜铁电体为紧凑高效的电力系统提供了广阔的前景。然而，目前尚不清楚其底层结构的演变如何产生其定义的储能特性。在这里，通过光学二次谐波产生，以及 X 射线衍射和透射电子显微镜分析，揭示了 1400 nm 铁电 Ba(Zr 0.2 Ti 0.8 )O 3 (BZT) 薄膜中多晶型纳米域的电场驱动结构演变。BZT 薄膜从剩余状态转变为充电状态，具有提高的能量效率（≈90%）和出色的疲劳耐久性（在 10 次后几乎没有能量效率损失和 ≈25% 的存储能量损失）7个双极循环 @ 1.5 MV cm -1最大电场）。充放电循环后相分离显着增加。该性能归功于超自适应多晶型纳米域，它有效地适应了电切换过程中同时存在的弹性和电应力场。
更新日期：2022-07-20
中文翻译：
电场驱动铁电 Ba(Zr,Ti)O3 薄膜中多晶型纳米畴的结构演化
具有大击穿强度和高能量密度的薄膜铁电体为紧凑高效的电力系统提供了广阔的前景。然而，目前尚不清楚其底层结构的演变如何产生其定义的储能特性。在这里，通过光学二次谐波产生，以及 X 射线衍射和透射电子显微镜分析，揭示了 1400 nm 铁电 Ba(Zr 0.2 Ti 0.8 )O 3 (BZT) 薄膜中多晶型纳米域的电场驱动结构演变。BZT 薄膜从剩余状态转变为充电状态，具有提高的能量效率（≈90%）和出色的疲劳耐久性（在 10 次后几乎没有能量效率损失和 ≈25% 的存储能量损失）7个双极循环 @ 1.5 MV cm -1最大电场）。充放电循环后相分离显着增加。该性能归功于超自适应多晶型纳米域，它有效地适应了电切换过程中同时存在的弹性和电应力场。
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