High-performance ferroelectric memory based on phase-separated films of polymer blends
Bhansali, Unnat Sampatraj
Almadhoun, Mahmoud N.
Odeh, Ihab N.
Cha, Dong Kyu
Alshareef, Husam N.
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
Imaging and Characterization Core Lab
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
SABIC - Corporate Research and Innovation Center (CRI) at KAUST
Materials Science and Engineering Program
Functional Nanomaterials and Devices Research Group
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AbstractHigh-performance polymer memory is fabricated using blends of ferroelectric poly(vinylidene-fluoride-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 (Rrms ≈ 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 106 cycles at 1 KHz) and high dielectric breakdown fields (≈360 MV/m). © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
SponsorsThe authors acknowledge the generous financial support from KAUST and Saudi Basic Industries Corporation (SABIC) Grant No. 2000000015.
JournalAdvanced Functional Materials