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Multi-layered carbon nanotube UV polariser for photo-alignment of liquid crystals

Hoon Sub Shina Applied Materials Institute for BIN Convergence, Department of BIN Convergence Technology and Department of Polymer Nano Science and Technology, Jeonbuk National University, Jeonju, Korea;b LG Display Co., Ltd, Gumi, Gyungbuk, KoreaView further author information

Ramesh Mandaa Applied Materials Institute for BIN Convergence, Department of BIN Convergence Technology and Department of Polymer Nano Science and Technology, Jeonbuk National University, Jeonju, Korea

https://orcid.org/0000-0002-6171-7991 View further author information

Tae Hyung Kima Applied Materials Institute for BIN Convergence, Department of BIN Convergence Technology and Department of Polymer Nano Science and Technology, Jeonbuk National University, Jeonju, KoreaView further author information

Jong Gil Parkc Center for Integrated Nanostructure Physics(CINAP), Institute for Basic Science(IBS), Sungkyunkwan University, Suwon, Korea;d Department of Energy Science, Sungkyunkwan University, Suwon, KoreaView further author information

Young Jin Lima Applied Materials Institute for BIN Convergence, Department of BIN Convergence Technology and Department of Polymer Nano Science and Technology, Jeonbuk National University, Jeonju, KoreaView further author information

Byeong Koo Kimb LG Display Co., Ltd, Gumi, Gyungbuk, KoreaView further author information

Young Hee Leec Center for Integrated Nanostructure Physics(CINAP), Institute for Basic Science(IBS), Sungkyunkwan University, Suwon, Korea;d Department of Energy Science, Sungkyunkwan University, Suwon, KoreaView further author information

Seung Hee Leea Applied Materials Institute for BIN Convergence, Department of BIN Convergence Technology and Department of Polymer Nano Science and Technology, Jeonbuk National University, Jeonju, KoreaCorrespondence[email protected]
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ABSTRACT

An efficient ultraviolet (UV) polariser based on multi-layered carbon nanotubes (CNTs) which is obtained by set of CNT films attached to substrate in series with matching orientations is demonstrated. The degree of polarisation in the UV region increases with increasing number of CNT layers, reaching ~91% in the CNT polariser with 12 layers. A thin film with photoalignment polymer exposed with more than eight layers CNT polariser induces excellent homogenous liquid crystal (LC) alignment. The fringe-field switching (FFS) LC device with the photoalignment layer shows excellent electro-optics comparable to that with conventional metallic wire-grid polariser (WGP). The work proposes cost-effective novel polariser replacing WGP for photoalignment of LC.

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The authors declare no competing financial interest.

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Funding

This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2016R1D1A1B01007189) and the Korea Government (MSIT) funded through the National Research Foundation of Korea (NRF) (No. 2019R1A5A8080326).

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Multi-layered carbon nanotube UV polariser for photo-alignment of liquid crystals

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Multi-layered carbon nanotube UV polariser for photo-alignment of liquid crystals

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