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Photoaligned Nanorod Enhancement Films with Polarized Emission for Liquid‐Crystal‐Display Applications
Author(s) -
Srivastava Abhishek K.,
Zhang Wanlong,
Schneider Julian,
Rogach Andrey L.,
Chigrinov Vladimir G.,
Kwok HoiSing
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201701091
Subject(s) - materials science , nanorod , gamut , polarization (electrochemistry) , liquid crystal display , optoelectronics , brightness , liquid crystal , fabrication , optics , viewing angle , nanotechnology , medicine , chemistry , physics , alternative medicine , pathology
Semiconductor nanorods (NR) emit polarized light, which is expected to bring manifold benefits, in terms of brightness and color enhancement, for modern liquid‐crystal displays (LCD). In this regard, photoaligned nanorod enhancement films (NREF) for color and polarization conversion for LCD backlights are introduced here. The photoinduced anchoring forces, by the photoalignment layer, stimulate well‐ordered self‐assembly of NR in the thin polymer films. Green and red emitting NR with a quantum yield of ≈80% are aligned unidirectionally and in‐plane, showing a polarization ratio of >7:1 and a degree of polarization of >0.81. The photoalignment technique facilitates the fabrication of mixed and multiple stacked NREF for LCDs, which improves the color gamut and polarization efficiency, and is thus expected to increase the optical efficiency of conventional LCDs by ≈60%.