Ti doping effects on the Seebeck coefficient and electrical conductivity of mesoporous ZnO thin film

Min Hee Hong, Haryeong Choi, Younghun Kim, Taehee Kim, Hyung Hee Cho, Zied Driss, Dorra Driss, Abdallah Bouabidi, Souhir Euchy, Hyung Ho Park

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The low thermal conductivity of mesoporous structures, due to the pores acting as phonon scattering centers, allows their use in thermoelectric devices. However, high Seebeck coefficient and electrical conductivity and low thermal conductivity are required to enhance their thermoelectric properties. In this study, Ti-doped mesoporous ZnO thin films with various Ti concentrations were fabricated and analyzed. When increasing the Ti dopant concentration up to 1.5 at%, the crystallinity and pore structure of the doped films remained almost unchanged, their porosity and thickness slightly increased, the electrical conductivity was also enhanced due to the increased carrier concentration, and the Seebeck coefficient decreased. These Ti doping-induced increase in electrical conductivity and decrease in Seebeck coefficient led to an increase of almost 1.5 times in the power factor of the mesoporous ZnO thin films.

Original languageEnglish
Article number121757
JournalMaterials Chemistry and Physics
Volume235
DOIs
Publication statusPublished - 2019 Sep 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

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