| 학회 |
한국재료학회 |
| 학술대회 |
2019년 가을 (10/30 ~ 11/01, 삼척 쏠비치 호텔&리조트) |
| 권호 |
25권 2호 |
| 발표분야 |
F. 광기능/디스플레이 재료 분과 |
| 제목 |
Development of Two-dimensional Layered Double Hydroxide for Unipolar Switching Memory Application |
| 초록 |
Diverse forms of two-dimensional (2D) materials have been attracting a lot of attention as emerging materials for low-power and high-performance electronic or optoelectronic device applications1. Layered double hydroxide(LDH) is a kind of 2D layers consisting of a positively charged metal hydroxide layer and intercalated charge-balancing anions, expressed by [M2+1-x M3+x (OH)2]x+ (An-)x/n . mH2O. In this study, we synthesized three LDH layers using three divalent cations such as Zn2+, Ni2+, and Co2+ and controlled each packing density, which all were confirmed by XRD and SEM analysis. We analyzed and performed the electrical properties for each LDH in a form of two-terminal vertical junction structures using Pt and FTO electrode. Interestingly, the densely-packed ZnAl-LDH based device exhibited only an unipolar switching behavior with 103 ON-OFF ratio and acceptable stability, while all others did not show any switching feature. Different morphologies of the LDH layers depending on the ion kinds and the packing density are mainly attributed to their electrical characteristics. A potential switching the densely-packed ZnAl-LDH can be suggested by space-charge-limited conduction (SCLC) transport and directional motion of ionic vacancy by the electric field. Our result indicates the importance of 2D LDH stacking morphology for the implementation of the nonvolatile resistive switching device. |
| 저자 |
조해인1, 전찬우2, 장진곤1, 박일규2, 왕건욱1
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| 소속 |
1고려대, 2서울과학기술대 |
| 키워드 |
2D materials; transparent; memory
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| E-Mail |
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