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논문 기본 정보

자료유형
학술저널
저자정보
Yuehua Dai (Anhui University) Shanshan Gong (Anhui University) Zhisheng Zhong (Anhui University) Fengyu Gao (Anhui University) Feifei Wang (Anhui University) Cheng Ding (Anhui University) Jin Yang (Anhui University) Fei Yang (Anhui University)
저널정보
성균관대학교 성균나노과학기술원 NANO NANO Vol.13 No.6
발행연도
2018.1
수록면
14 - 21 (8page)

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In this work, the threshold voltage (Vth) and nonlinearity (NL) of Graphene (Gra)/TiO2/Gra heterojunction were studied. First, the density functional tight binding (DFTB+) and much more dynamics were used to investigate the IV curves and the resistive switching properties of TiO2 slab and Gra/TiO2/Gra heterojunction. The NL of Gra/TiO2/Gra heterojunction is stronger than that of the TiO2 slab. The Vth of the resistive transition of the heterojunction is larger than that of the TiO2 slab. The tunneling probabilities and the Mulliken atomic population at the Gra/TiO2 interface under different electric fields were calculated by the Cambridge sequential total energy package (CASTEP). Results showed that both the parameters evidently increased under a certain numerical electric field. Finally, the movement of atom in the electric field and the change in the chemical bond were simulated by DFTB+ module. The effect of the Gra/TiO2 interface on Vth and NL was further illustrated. Postponed Vth and improved NL were found at the heterojunction relative to the TiO2 slab due to the presence of the interface barrier. This work provides guidance and reference for design and optimization of TiO2-based selectors.

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