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High-Performance Ferroelectric Memory Based on Phase-Separated Films of Polymer Blends

机译:基于聚合物共混物相分离膜的高性能铁电存储器

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摘要

High-performance polymer memory is fabricated using blends of ferroelectric poly(vinylidene-fiuoride-trifluoroethylene) (P(VDF-TrFE)) and highly insulating poly(p-phenylene oxide) (PPO). The blend films spontaneously phase separate into amorphous PPO nanospheres embedded in a semicrystalline P(VDF-TrFE) matrix. Using low molecular weight PPO with high miscibility in a common solvent, i.e., methyl ethyl ketone, blend films are spin cast with extremely low roughness (R_(rms)≈4.92 nm) and achieve nanoscale phase seperation (PPO domain size < 200 nm). These blend devices display highly improved ferroelectric and dielectric performance with low dielectric losses (<0.2 up to 1 MHz), enhanced thermal stability (up to =353 K), excellent fatigue endurance (80% retention after 10~6 cycles at 1 KHz) and high dielectric breakdown fields (≈360 MV/m).
机译:高性能聚合物存储器是使用铁电性聚偏二氟乙烯-三氟乙烯(P(VDF-TrFE))和高绝缘性聚对苯醚(PPO)的混合物制成的。共混膜自发相分离成嵌入半结晶P(VDF-TrFE)基质中的非晶PPO纳米球。使用在普通溶剂(即甲乙酮)中具有高混溶性的低分子量PPO,以极低的粗糙度(R_(rms)≈4.92nm)旋涂共混膜,并实现纳米级相分离(PPO域尺寸<200 nm) 。这些混合器件显示出高度改善的铁电和介电性能,具有低介电损耗(<0.2高达1 MHz),增强的热稳定性(高达= 353 K),出色的耐疲劳性(在1 KHz的10〜6个循环后保持80%的保持力)和高介电击穿场(≈360MV / m)。

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  • 来源
    《Advanced Functional Materials》 |2014年第10期|1372-1381|共10页
  • 作者单位

    King Abdullah University of Science and Technology (KAUST) Thuwal, 23955-6900, Saudi Arabia;

    King Abdullah University of Science and Technology (KAUST) Thuwal, 23955-6900, Saudi Arabia;

    SABIC Corporate Research and Innovation Center Thuwal, 23955-6900, Saudi Arabia;

    SABIC Corporate Research and Innovation Center Thuwal, 23955-6900, Saudi Arabia;

    King Abdullah University of Science and Technology (KAUST) Thuwal, 23955-6900, Saudi Arabia;

    King Abdullah University of Science and Technology (KAUST) Thuwal, 23955-6900, Saudi Arabia;

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