Superior switching behavior of liquid crystals on surface-modified compound oxide films

Hae Chang Jeong, Byeong Yun Oh, Hong Gyu Park, Ju Hwan Lee, Yoon Ho Jung, Sang Bok Jang, Dae Shik Seo

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We demonstrate high-performance liquid crystal (LC) devices using alignment layers formed of solution-processed HfYO films that were subjected to ion-beam (IB) irradiation. IB irradiation entails the increment of the surface roughness and chemical modification of the surface. Our X-ray photoelectron spectroscopy (XPS) analysis revealed that IB irradiation also breaks oxygen bonds, and thereby creates oxygen vacancies with lattice displacement of the metal atoms. This variation stabilizes the homogeneous LC alignment. The LC cells formed using the IB-irradiated HfYO films with an intensity of 2200 eV yielded a rapid response time of 6.579 ms. Therefore, our fast switching application based on IB-irradiated HfYO films has great potential for application of display devices.

Original languageEnglish
Pages (from-to)104-109
Number of pages6
JournalOptical Materials
Volume50
DOIs
Publication statusPublished - 2015 Dec

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering

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