| 학회 | 한국재료학회 |
| 학술대회 | 2009년 봄 (05/21 ~ 05/22, 무주리조트) |
| 권호 | 15권 1호 |
| 발표분야 | 반도체재료 |
| 제목 | Effect of Metal Nanocrystal Properties on Small-molecule Nonvolatile Memory-cells |
| 초록 | Currently, a small-molecule nonvolatile memory has attracted much interest as one of candidate devices for next generation nonvolatile memory because of its simple process, small device area, and high speed. To investigate electrical characteristics of small-molecule nonvolatile memory cell using Ni, Cu, and Ti as a middle metal nanocrystals layer, we fabricated with the device structure of Al / Alq3 (Aluminum tris (8-hydroxyquinoline)) / metal (Ni, Cu, Ti) nanocrystals / Alq3 / Al. A high vacuum thermal deposition method was used for in-situ fabrication process. Our devices showed a nonvolatile memory characteristic at only memory cell using Ni nanocrystal. Characteristics of others are unstable and do not showed a nonvolatile memory behavior. Effect of formation of various metal nanocrystals on small-molecule nonvolatile memory characteristics is showed by analyzing TEM image. In case Ni, formation of metal nanocrystals is regular not only poly Ni, but Ni oxide as tunneling barrier. So it caused good nonvolatile memory characteristics. However, in case of using Cu for metal nanocrystals, electrons have difficult for charging and discharging to metal nanocrystals because tunneling barrier, Cu oxide, is not formed adequately. In case of Ti, the space of charging and discharging by electrons is insufficient because poly Ti does not nearly exist in metal nanocrystals layer. Formations of metal nanocrystals and metal oxide as tunneling barrier has critical role in realizing small-molecule nonvolatile memory characteristics. Acknowledgement This research was supported by “The National Research Program for 1.0 Tera-bit Nonvolatile Memory Development” sponsored by the Korean Ministry of Knowledge Economy. |
| 저자 | Sang-Yi Lee1, Yool-Guk Kim2, Kwang-Hee Park3, Woo-Sik Nam2, Sung-Ho Seo3, Jea-Gun Park2 |
| 소속 | 1Division of Nanoscale Semiconductor Engineering, 2Hanyang Univ., 3Department of Electronics Computer Engineering |
| 키워드 | nanocrystal; nonvolatile; small-molecule; organic; bistable; memory |
