Performance improvement of Sb 2 Te 3 phase change material by Al doping

Cheng Peng, Liangcai Wu, Zhitang Song, Feng Rao, Min Zhu, Xuelai Li, Bo Liu, Limin Cheng, Songlin Feng, Pingxiong Yang, Junhao Chu

Research output: Contribution to journalArticlepeer-review

74 Scopus citations

Abstract

Al doped Sb 2 Te 3 material was proposed to improve the performance of phase-change memory. Crystallization temperature, activation energy, and electrical resistance of the Al doped Sb 2 Te 3 films increase markedly with the increasing of Al concentration. The additional Al-Sb and Al-Te bonds enhance the amorphous thermal stability of the material. Al 0.69 Sb 2 Te 3 material has a better data retention (10 years at 110 °C) than that of Ge 2 Sb 2 Te 5 material (10 years at 87 °C). With a 100 ns width voltage pulse, SET and RESET voltages of 1.3 and 3.3 V are achieved for the Al 0.69 Sb 2 Te 3 based device.

Original languageEnglish
Pages (from-to)10667-10670
Number of pages4
JournalApplied Surface Science
Volume257
Issue number24
DOIs
StatePublished - 1 Oct 2011

Keywords

  • Phase transformation
  • Thermal properties
  • Thin films
  • XPS

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