Electrical and optical properties of epitaxial and polycrystalline undoped and Al-doped ZnO thin films grown by pulsed laser deposition

Jun Hong Noh, Jae Sul An, Jin Young Kim, Chin Moo Cho, Kug Sun Hong, Hyun Suk Jung

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Undoped and Al-doped (1.6%) ZnO films were prepared on (0001) sapphire and fused silica substrates using a pulsed laser deposition technique. The ZnO films on sapphire substrates were epitaxially grown, while the ZnO films on fused silica substrates were texturally grown. The films on sapphire substrates were ordered along the in-plane direction and had grains in which the c-axis was well aligned normal to the substrate. However, the films on fused silica were randomly oriented along the in-plane direction and had poor c-axial aligned grains. The structure analyses showed that the epitaxial ZnO films had low-angle grain boundaries, while the textured polycrystalline ZnO films had high-angle tilt and twist grain boundaries. The nature of the grain boundaries influenced the electrical and optical properties of the undoped and Al-doped ZnO films. Resistivity, Hall mobility, carrier concentration, and near band edge emission of the films were measured at room temperature and discussed in connection with the nature of grain boundaries.

Original languageEnglish
Pages (from-to)497-501
Number of pages5
JournalJournal of Electroceramics
Volume23
Issue number2-4
DOIs
Publication statusPublished - 2009 Oct
Externally publishedYes

Keywords

  • Al-doped ZnO
  • Epitaxial
  • Grain boundary
  • Polycrystalline
  • Thermal stability
  • Transparent conducting oxide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Electrical and optical properties of epitaxial and polycrystalline undoped and Al-doped ZnO thin films grown by pulsed laser deposition'. Together they form a unique fingerprint.

Cite this