Article
Materials Science, Multidisciplinary
S. Saha, A. K. Das, S. Sinha, R. Karmakar, R. Hatada, W. Ensinger, S. Flege, K. Baba, A. K. Meikap
Summary: The effect of molybdenum doping and acetylene gas flow rate on the electrical properties of diamond like carbon films is reported. Molybdenum doping increased the dielectric constant and the change in flow rate affected the bonding type in the film. The ac conductivity of the films increased with frequency and showed two plateau regions with 29% molybdenum doping. The experimental data indicated the occurrence of both ionic conduction and polaron hopping.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Fangzhou Yu, Wen-Chiang Hong, Guangyuan Li, Yuxuan Li, Ming Lu, Yicheng Lu
Summary: A negative capacitance thin-film transistor (NC-TFT) was fabricated on a glass substrate using MgZnO, with a Mg0.03Zn0.97O semiconductor layer as the channel and Ni0.02Mg0.15Zn0.83O as the ferroelectric layer. The NC-TFT showed significantly reduced subthreshold swing and a high on/off ratio of drain current.
IEEE ELECTRON DEVICE LETTERS
(2021)
Article
Materials Science, Ceramics
Evgeny I. Goldman, Galina V. Chucheva, Dmitry A. Belorusov
Summary: A model of high-frequency impedance of metal-ferroelectric-semiconductor structures has been studied, providing insight into key parameters from experimental data. Results indicate that silicon does not enter a strong depletion state at various external voltages, with the capacitance of metal-ferroelectric-silicon structures remaining consistent across different voltage levels.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Yuji Noguchi, Hiroki Matsuo
Summary: The superlattice consisting of Mn(5%)-doped BiFeO3 and BaTiO3 layers grown on SrTiO3 substrates shows different behaviors based on the number of unit cells in the layers. Superlattices with fewer than 5 unit cells behave as a unified ferroelectric, while those with more than 25 unit cells behave as a simple series connection of individual capacitors. Density functional theory calculations explain the spontaneous polarization behavior in these thin superlattices and suggest the potential for novel ferroelectrics with different crystal symmetries.
Article
Engineering, Electrical & Electronic
S. Demirezen, A. G. Al-Sehemi, A. Yuzer, M. Ince, A. Dere, A. A. Al-Ghamdi, F. Yakuphanoglu
Summary: In this study, symmetrical copper-phthalocyanine (CuPc) was coated on a p-Si wafer using the spin-coating method. The photoresponse and electrical properties of the Al/symmetrical CuPc/p-Si structures/diodes were investigated under different solar irradiances. The experimental results showed that the photocurrent of the diodes was influenced by the solar irradiance.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Ceramics
Hidetoshi Miyazaki, Yosuke Yamashita, Takeshi Tsuji, Wenchang Yeh, Shinya Tsukada
Summary: SiO2-coated BaTiO3 (BT) powder was used to prepare BT films on Au/stainless steel substrates by pulsed electrophoretic deposition. The BT films were sintered with a semiconductor laser and showed improved dielectric and ferroelectric properties. Laser irradiation promoted the sintering of the BT film and reduced its thickness, resulting in increased remanent polarization and coercive field.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Hyeon Woo Park, Seung Dam Hyun, In Soo Lee, Suk Hyun Lee, Yong Bin Lee, Minsik Oh, Beom Yong Kim, Seung Gyu Ryoo, Cheol Seong Hwang
Summary: The study investigates the effect of charge injection during ferroelectric switching in a ferroelectric-dielectric bilayer by developing a dynamic model and conducting electrical measurements. The model reveals that the amount of injected charges can be larger, smaller, or equal to that of the switched polarization, and describes the analytical conditions of the compensation state. This research provides insights into the field-effect devices based on uncompensated ferroelectric charges.
Article
Chemistry, Multidisciplinary
Chao Feng, Tong Liu, Xinyu Bu, Shifeng Huang
Summary: The study investigated the effects of Fe doping on the properties of PMN-PT thin films, and found that 2% Fe-doped PMN-PT thin films annealed at 650°C exhibited optimal ferroelectric properties and excellent dielectric performance.
Article
Engineering, Electrical & Electronic
Minghao Shao, Tianqi Lu, Zhibo Wang, Houfang Liu, Ruiting Zhao, Xiao Liu, Xiaoyue Zhao, Renrong Liang, Yi Yang, Tian-Ling Ren
Summary: The study focuses on the dielectric properties and interface parameters of ferroelectric hafnium zirconium oxide thin films, examining their effects on dynamic, piezoelectric, and electrostrictive behaviors. Analysis using an impedance model with constant phase element (CPE) was conducted to determine the influence of the interface on the dielectric properties, with dielectric spectra at elevated temperatures used for verification.
IEEE JOURNAL OF THE ELECTRON DEVICES SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Sumayya M. Ansari, Sueda Saylan, Inas Taha, Dalaver H. Anjum, Baker Mohammad, Haila M. Aldosari
Summary: The temperature-dependent capacitance-voltage and conductance-voltage measurements of GeTe thin films were investigated. The films exhibited different capacitance and conductivity characteristics below and above the amorphous-crystalline transition temperature. Crystallization resulted in increased capacitance and conductivity of the GeTe thin films.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Xia-Li Liang, Jian-Qing Dai
Summary: BFMO thin films were successfully deposited on FTO/glass substrates via sol-gel technique, with Mn doping showing significant enhancement in properties compared to pure BFO samples. The Mn doping-induced changes in structure, grain size reduction, and oxygen vacancies were identified as underlying mechanisms for the improved performance of BFMO films, making them promising for ferroelectric photovoltaic device applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Mingjian Ding, Binbin Huang, Xiaoyang Chen, Yun Liu, Jie Zhang, Chenyu Xu, Ping Yu
Summary: The (1-x)CaZrO3-xSrTiO3 solid-solution thin films with different compositions were prepared. The crystal structure of the films transitioned from orthorhombic to pseudo cubic and then to cubic as the composition changed. Among the prepared films, the x = 0.3 thin films showed the smallest expansion ratio of lattice volume with temperatures and the highest temperature stability of dielectric response and leakage current density at high voltage. The relationship between the tolerance factor and the temperature stability was analyzed, and it was found that high temperature stability of perovskite-type paraelectric thin films could be achieved through phase boundary design.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Chemistry, Multidisciplinary
Biyao Zhao, Yunting Yan, Jinshun Bi, Gaobo Xu, Yannan Xu, Xueqin Yang, Linjie Fan, Mengxin Liu
Summary: In this paper, the annealing effects of TiN/Hf0.5Zr0.5O2/TiN metal-ferroelectric-metal capacitors were investigated. It was found that microwave annealing significantly increased the twofold remanent polarization and inhibited the wake-up effect. The orthorhombic crystalline phase was observed with reduced interdiffusion in microwave annealing devices. Moreover, the microwave annealing treatment resulted in a lower leakage current and decreased defect density in the capacitors.
Article
Chemistry, Physical
Fei Yan, Jiajia Liao, Ke Cao, Shijie Jia, Yichun Zhou, Min Liao
Summary: In this study, HfO2/ZrO2/HfO2 sandwich structured thin films were fabricated, and their ferroelectricity and dielectric tunability were systematically investigated. The results showed that under low operating voltage, these thin films exhibited large remnant polarization and high dielectric tunability, as well as good endurance and high energy storage properties. This strategy is of great significance for the development of electronic devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yoonho Ahn, Jong Yeog Son
Summary: Epitaxial BTO/PTO multilayer thin films exhibit ferroelectric polarization switching characteristics with an imprint phenomenon, which can be utilized for developing high-density ferroelectric-based storage media.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
