화학공학소재연구정보센터
Macromolecular Research, Vol.25, No.12, 1212-1219, December, 2017
Fabrication of new photoreactive vertical alignment thin layers for fast switching liquid crystal display
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New photoreactive vertical alignment layers have been fabricated by spin coating the mixtures of polyimide (PI) and bi-functional monomers on the indium tin oxide substrate. Post ultraviolet (UV) surface treatment under electric field induced fast electro-optical switching of liquid crystal (LC) through formation of pre-tilted alignment layer. To investigate the effect of reactive monomers on the electro-optical properties of LC device, newly designed four types of monomers with different aromatic cores and photoreactive groups were applied to PI mixtures. Stable homeotropic alignment and fast response time in the LC device were achieved with a simple coating and subsequent UV process of monomer with both a phenyl core and methacrylic groups in the PI layer and it yields electro-optical performance superior to that achieved with the conventional PI alignment layer. This elegant approach provides a stable and fast switching LC alignment layer for high performance LC displays.
  1. Lien SC, Cai C, Nunes RW, John RA, Galligan EA, Colgan E, Wilson JS, Jpn. J. Appl. Phys., 37, 597 (1998)
  2. Kim S, Berkeley BH, Kim KH, Song JK, J. Soc. Inf. Display, 12, 353 (2004)
  3. Lyu JJ, Sohn J, Kim HY, Lee SH, J. Display Technol., 3, 404 (2007)
  4. Srivastava AK, de Bougrenet de la Tocnaye JL, Dupont L, J. Display Technol., 6, 522 (2010)
  5. Luo Z, Peng F, Chen H, Hu M, Li J, Wu ST, Opt. Mater. Express, 5, 603 (2015)
  6. Jiao M, Ge Z, Song Q, Wu ST, Appl. Phys. Lett., 92, 061102 (2008)
  7. Lin GJ, Chen TJ, Chen BY, Wu JJ, Yang YJ, Opt. Mater. Express, 4, 1657 (2014)
  8. Lee SH, Kim SM, Wu ST, J. Soc. Inf. Display., 17, 551 (2009)
  9. Kim SG, Kim SM, Kim YS, Lee HK, Lee SH, Lyu JJ, Kim KH, Lyu R, Wu ST, J. Phys. D-Appl. Phys., 41, 055401 (2008)
  10. Weng L, Liao PC, Lin CC, Ting TL, Hsu WH, Su JJ, Chien LC, AIP Adv., 5, 097218 (2015)
  11. Kwon YR, Choi YE, Lee BH, Kim JC, Lee MH, Jeong KU, Lee SH, J. Phys. D-Appl. Phys., 49, 165501 (2016)
  12. Kim SG, Kim SM, Kim YS, Lee HK, Lee SH, Appl. Phys. Lett., 90, 261910 (2007)
  13. Lee YJ, Kim YK, Jo SI, Gwang JS, Yu CJ, Kim JH, Opt. Express, 17, 10298 (2009)
  14. Lee YJ, Jo SI, Kim JH, Yu CJ, Jpn. J. Appl. Phys., 49, 030209 (2010)
  15. Mun BJ, Lee JH, Kim BK, Choi HC, Kang B, Song KH, Lee SH, Lee GD, IEEE Trans. Electron. Devices, 62, 3722 (2015)
  16. Konios D, Stylianakis MM, Stratakis E, Kymakis E, J. Colloid Interface Sci., 430, 108112 (2014)
  17. Jones F, Farrow JB, van Bronswijk W, Langmuir, 14(22), 6512 (1998)
  18. Son I, Kim JH, Lee B, Kim C, Yoo JY, Hyun K, Wu JP, Lee JH, Macromol. Res., 24(3), 235 (2016)
  19. Mizunuma T, Oo TN, Nagano Y, Ma H, Haseba Y, Higuchi H, Okumura Y, Kikuchi H, Opt. Mater. Express, 1, 1156 (2011)