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High Performance On-Chip Energy Storage Capacitors with Plasma-Enhanced Atomic Layer-Deposited Hf(0.5)Zr(0.5)O(2)/Al-Doped Hf(0.25)Zr(0.75)O(2) Nanofilms as Dielectrics

Concurrently achieving high energy storage density (ESD) and efficiency has always been a big challenge for electrostatic energy storage capacitors. In this study, we successfully fabricate high-performance energy storage capacitors by using antiferroelectric (AFE) Al-doped Hf(0.25)Zr(0.75)O(2) (HfZ...

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Detalles Bibliográficos
Autores principales: He, Yuli, Zheng, Guang, Zhu, Bao, Wu, Xiaohan, Liu, Wen-Jun, Zhang, David Wei, Ding, Shi-Jin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10254242/
https://www.ncbi.nlm.nih.gov/pubmed/37299668
http://dx.doi.org/10.3390/nano13111765
Descripción
Sumario:Concurrently achieving high energy storage density (ESD) and efficiency has always been a big challenge for electrostatic energy storage capacitors. In this study, we successfully fabricate high-performance energy storage capacitors by using antiferroelectric (AFE) Al-doped Hf(0.25)Zr(0.75)O(2) (HfZrO:Al) dielectrics together with an ultrathin (1 nm) Hf(0.5)Zr(0.5)O(2) underlying layer. By optimizing the Al concentration in the AFE layer with the help of accurate controllability of the atomic layer deposition technique, an ultrahigh ESD of 81.4 J cm(−3) and a perfect energy storage efficiency (ESE) of 82.9% are simultaneously achieved for the first time in the case of the Al/(Hf + Zr) ratio of 1/16. Meanwhile, both the ESD and ESE exhibit excellent electric field cycling endurance within 10(9) cycles under 5~5.5 MV cm(−1), and robust thermal stability up to 200 °C. Thus, the fabricated capacitor is very promising for on-chip energy storage applications due to favorable integratability with the standard complementary metal–oxide–semiconductor (CMOS) process.