Patterned polarized light emission of fluorene derivative based on photoalignment, N. Kawatsuki, A. Hirakawa, K. Tada, M. Kondo and H. Ono, Jpn. J. Appl. Phys. 48 (2009) 120208.


Patterned polarized blue-light emission was achieved using a new liquid-crystalline fluorene derivative (F1) on a patterned photoalignment layer. Adjusting the doses of linearly polarized (LP) UV light exposure onto the photoalignment layer controlled the alignment direction of F1, which coincided with the molecular reorientation direction of the photoalignment layer. An electroluminescent device with orthogonally patterned molecular orientation was fabricated, demonstrating patterned polarized blue-light emission with a polarization ratio between 2.7 and 3.

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