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

doi:10.1016/j.optmat.2015.10.006

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

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

6 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 language	English
Pages (from-to)	104-109
Number of pages	6
Journal	Optical Materials
Volume	50
DOIs	https://doi.org/10.1016/j.optmat.2015.10.006
Publication status	Published - 2015 Dec

Bibliographical note

Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.

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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10.1016/j.optmat.2015.10.006

Cite this

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title = "Superior switching behavior of liquid crystals on surface-modified compound oxide films",

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.",

author = "Jeong, {Hae Chang} and Oh, {Byeong Yun} and Park, {Hong Gyu} and Lee, {Ju Hwan} and Jung, {Yoon Ho} and Jang, {Sang Bok} and Seo, {Dae Shik}",

year = "2015",

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language = "English",

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journal = "Optical Materials",

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T1 - Superior switching behavior of liquid crystals on surface-modified compound oxide films

AU - Jeong, Hae Chang

AU - Oh, Byeong Yun

AU - Park, Hong Gyu

AU - Lee, Ju Hwan

AU - Jung, Yoon Ho

AU - Jang, Sang Bok

AU - Seo, Dae Shik

PY - 2015/12

Y1 - 2015/12

N2 - 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.

AB - 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.

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JO - Optical Materials

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

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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