All-perovskite transparent high mobility field effect using epitaxial BaSnO3 and LaInO3

Useong Kim, Chulkwon Park, Taewoo Ha, Young Mo Kim, Namwook Kim, Chanjong Ju, Jisung Park, Jaejun Yu, Jae Hoon Kim, Kookrin Char

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98 Citations (Scopus)


We demonstrate an all-perovskite transparent heterojunction field effect transistor made of two lattice-matched perovskite oxides: BaSnO3 and LaInO3. We have developed epitaxial LaInO3 as the gate oxide on top of BaSnO3, which were recently reported to possess high thermal stability and electron mobility when doped with La. We measured the dielectric properties of the epitaxial LaInO3 films, such as the band gap, dielectric constant, and the dielectric breakdown field. Using the LaInO3 as a gate dielectric and the La-doped BaSnO3 as a channel layer, we fabricated field effect device structure. The field effect mobility of such device was higher than 90 cm2 V-1 s-1, the on/off ratio was larger than 107, and the subthreshold swing was 0.65 V dec-1. We discuss the possible origins for such device performance and the future directions for further improvement.

Original languageEnglish
Article number036101
JournalAPL Materials
Issue number3
Publication statusPublished - 2015 Mar 1

Bibliographical note

Publisher Copyright:
© 2015 Author(s).

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)


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