Effects of Ag doping on the crystallization properties of Sb-rich GeSb thin films

Nam Hee Kim, Hyung Keun Kim, Kyu Min Lee, Hyun Chul Sohn, Jae Sung Roh, Doo Jin Choi

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Ag-doped and un-doped Sb-rich GeSb thin films were deposited by DC magnetron co-sputtering. The electrical, structural, and optical properties of the thin films phase change were investigated using 4-point probe measurement, X-ray diffraction (XRD), transmission electron microscopy (TEM), and a static tester. With increasing Ag doping content, the crystallization temperature and sheet resistance of crystalline state decreased from 325 °C to 283 °C and from 187.33 Ω/□ to 114.62 Ω/□, respectively. XRD patterns of the films showed a Sb hexagonal structure, and the calculated grain size increased from 13.9 nm to 17 nm as the Ag concentration increased. Grain sizes of the Ag-doped thin films were larger than the grain sizes of un-doped thin films, as determined by TEM images. A static tester verified the decreased crystallization speed and optical contrast. Un-doped GeSb crystallization took 160 ns and 16 at.% Ag-doped GeSb crystallization took 200 ns when the laser power was 13 mW. Based on a power-time-effect diagram, the 12.6 at.% Ag-doped GeSb showed good thermal stability in a crystalline state.

Original languageEnglish
Pages (from-to)5323-5328
Number of pages6
JournalThin Solid Films
Volume519
Issue number16
DOIs
Publication statusPublished - 2011 Jun 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Effects of Ag doping on the crystallization properties of Sb-rich GeSb thin films'. Together they form a unique fingerprint.

  • Cite this