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- W4385998419 abstract "Herein, a systematic study of aluminum‐doped hafnium oxide to utilize its antiferroelectric‐like (AFE) properties for energy storage applications is done. The doping concentration of aluminum is optimized to obtain the AFE‐like phase. In addition, the impact of the postmetallization annealing temperature on the energy storage properties of the materials is studied. Metal–insulator–metal capacitors are fabricated by varying the doping concentration of the Al in HfO 2 from 1.9 to 6.2 at% with a constant thickness of 10 nm by atomic layer deposition. The devices are rapid thermal annealed by varying the annealing temperature from 650 to 800 °C for 20 s. Polarization measurements indicate a clear phase transformation from ferroelectric (FE) to AFE to paraelectric phase with the increase of doping concentration in the polarization measurements. The planar antiferroelectric devices have an energy storage density of 30 J cm −3 with 76% efficiency after 10 5 cycles. The storage density can be further increased by a factor of 16.5 using area‐enhanced substrates to 500 J cm − 3 at 73% efficiency. The endurance characteristics are studied for both planar and 3D capacitors which are found to be stable up to 10 8 cycles." @default.
- W4385998419 created "2023-08-20" @default.
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- W4385998419 date "2023-08-30" @default.
- W4385998419 modified "2023-10-12" @default.
- W4385998419 title "Stabilizing Antiferroelectric‐Like Aluminum‐Doped Hafnium Oxide for Energy Storage Capacitors" @default.
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- W4385998419 doi "https://doi.org/10.1002/adem.202300443" @default.
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