Large piezoresponse of lead-free Bi 0.5(Na 0.85K 0.15) 0.5TiO 3 thin film

Chang Won Ahn, Sung Sik Won, Aman Ullah, Sun Young Lee, Su Dae Lee, Ji Hye Lee, William Jo, Ill Won Kim

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


0.85Bi 0.5Na 0.5TiO 3-0.15Bi 0.5K 0.5TiO 3 (BNKT15) lead-free thin films were prepared on Pt(111)/TiO 2/SiO 2/Si(100) substrates by the chemical solution deposition method. BNKT15 are MPB composition in the Bi 0.5Na 0.5TiO 3-Bi 0.5K 0.5TiO 3 (BNT-BKT) system. The maximum piezoelectric coefficient (d 33,f) value of BNKT15 thin film is approximately 75 pm/V, which is comparable to that of polycrystalline PZT thin films. These results suggest that BNKT15 thin film can be used as an alternative for PZT films in piezoelectric micro-electromechanical systems.

Original languageEnglish
Pages (from-to)903-907
Number of pages5
JournalCurrent Applied Physics
Issue number3
StatePublished - May 2012

Bibliographical note

Funding Information:
This work was supported by the development program of local science park funded by the ULSAN Metropolitan City and the MEST (Ministry of Education, Science and Technology).


  • Bismuth sodium titanate
  • Ferroelectric
  • Lead-free
  • Piezoelectric
  • Thin film


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