Unidirectional alignment of liquid crystals on solution-derived hafnium tin oxide films via ion-beam irradiation

Ju Hwan Lee, Hae Chang Jeong, Sang Bok Jang, Hong Gyu Park, Byeong Yun Oh, Jeong Min Han, Dae Shik Seo

Research output: Contribution to journalArticle

Abstract

Abstract: We demonstrated the performance of solution-derived hafnium doped tin oxide films annealed at various temperatures via ion-beam irradiation. The Hf:SnO2 films were employed as liquid crystal alignment layers, which were deposited from solution to replace sputtering methods. Homogeneous and uniform liquid crystal alignment was achieved at all annealing temperatures, yielding a high-performance liquid crystal system. Field-emission scanning electron microscopy revealed the surface characteristics of the hafnium doped tin oxide films at various annealing temperatures, and various surface phenomena were observed. High-performance electro-optical properties were observed for the twisted nematic LC cells of hafnium doped tin oxide films annealed at various temperatures. The lowest threshold voltage (2.042 V) and fastest response time (8.494 ms) were achieved at an annealing temperature of 200 °C. Our results revealed the potential of solution-derived hafnium doped tin oxide films as liquid crystal alignment layers. Graphical Abstract: [InlineMediaObject not available: see fulltext.]

Original languageEnglish
Pages (from-to)261-268
Number of pages8
JournalJournal of Sol-Gel Science and Technology
Volume82
Issue number1
DOIs
Publication statusPublished - 2017 Apr 1

Fingerprint

Hafnium
hafnium oxides
Liquid Crystals
Tin oxides
Liquid crystals
Ion beams
tin oxides
hafnium
Oxide films
oxide films
ion beams
liquid crystals
alignment
Irradiation
irradiation
Annealing
annealing
Temperature
temperature
Surface phenomena

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Biomaterials
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

Lee, Ju Hwan ; Jeong, Hae Chang ; Jang, Sang Bok ; Park, Hong Gyu ; Oh, Byeong Yun ; Han, Jeong Min ; Seo, Dae Shik. / Unidirectional alignment of liquid crystals on solution-derived hafnium tin oxide films via ion-beam irradiation. In: Journal of Sol-Gel Science and Technology. 2017 ; Vol. 82, No. 1. pp. 261-268.
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Unidirectional alignment of liquid crystals on solution-derived hafnium tin oxide films via ion-beam irradiation. / Lee, Ju Hwan; Jeong, Hae Chang; Jang, Sang Bok; Park, Hong Gyu; Oh, Byeong Yun; Han, Jeong Min; Seo, Dae Shik.

In: Journal of Sol-Gel Science and Technology, Vol. 82, No. 1, 01.04.2017, p. 261-268.

Research output: Contribution to journalArticle

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AU - Lee, Ju Hwan

AU - Jeong, Hae Chang

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AU - Han, Jeong Min

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N2 - Abstract: We demonstrated the performance of solution-derived hafnium doped tin oxide films annealed at various temperatures via ion-beam irradiation. The Hf:SnO2 films were employed as liquid crystal alignment layers, which were deposited from solution to replace sputtering methods. Homogeneous and uniform liquid crystal alignment was achieved at all annealing temperatures, yielding a high-performance liquid crystal system. Field-emission scanning electron microscopy revealed the surface characteristics of the hafnium doped tin oxide films at various annealing temperatures, and various surface phenomena were observed. High-performance electro-optical properties were observed for the twisted nematic LC cells of hafnium doped tin oxide films annealed at various temperatures. The lowest threshold voltage (2.042 V) and fastest response time (8.494 ms) were achieved at an annealing temperature of 200 °C. Our results revealed the potential of solution-derived hafnium doped tin oxide films as liquid crystal alignment layers. Graphical Abstract: [InlineMediaObject not available: see fulltext.]

AB - Abstract: We demonstrated the performance of solution-derived hafnium doped tin oxide films annealed at various temperatures via ion-beam irradiation. The Hf:SnO2 films were employed as liquid crystal alignment layers, which were deposited from solution to replace sputtering methods. Homogeneous and uniform liquid crystal alignment was achieved at all annealing temperatures, yielding a high-performance liquid crystal system. Field-emission scanning electron microscopy revealed the surface characteristics of the hafnium doped tin oxide films at various annealing temperatures, and various surface phenomena were observed. High-performance electro-optical properties were observed for the twisted nematic LC cells of hafnium doped tin oxide films annealed at various temperatures. The lowest threshold voltage (2.042 V) and fastest response time (8.494 ms) were achieved at an annealing temperature of 200 °C. Our results revealed the potential of solution-derived hafnium doped tin oxide films as liquid crystal alignment layers. Graphical Abstract: [InlineMediaObject not available: see fulltext.]

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