Temperature-switched orientation properties through physicochemically constructed aluminum zirconium oxide films

Dong Hyun Kim, Dong Wook Lee, Jin Young Oh, Jonghoon Won, Dae Shik Seo

Research output: Contribution to journalArticlepeer-review


In general, it has one of the characteristics of homeotropic alignment and homogeneous alignment depending on the material and manufacturing process of the liquid crystal alignment layer. However, in this study, we propose a new type of alignment film that has the characteristics of changing the liquid crystal alignment direction according to the curing temperature. The AlZrO alignment film produced by the solution process and brush coating method showed homeotropic alignment characteristics when cured at low temperatures and homogeneous alignment characteristics when cured at high temperatures. These switching characteristics according to the curing temperature showed stable LC alignment, respectively, and the threshold voltages were 0.81 V and 0.857 V in vertical alignment (VA) mode and twisted nematic (TN) mode, respectively, demonstrating excellent electro-optical properties. The mechanism of these switching characteristics was analyzed through surface modification analysis. This study introduces new insights into liquid crystal alignment films that satisfy all of the high-efficiency fabrication process, various application possibilities due to their switching properties, and excellent electro-optical properties.

Original languageEnglish
Article number100480
Publication statusPublished - 2023 Mar

Bibliographical note

Funding Information:
This research was supported by the National Research Foundation of Korea (Grant No. 2022R1F1A106419211).

Publisher Copyright:
© 2023 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Surfaces, Coatings and Films
  • Materials Chemistry


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