Advanced Materials
Advanced Materials
5 years ago

Photoaligned Nanorod Enhancement Films with Polarized Emission for Liquid-Crystal-Display Applications

Photoaligned Nanorod Enhancement Films with Polarized Emission for Liquid-Crystal-Display Applications
Wanlong Zhang, Andrey L. Rogach, Julian Schneider, Abhishek K. Srivastava, Hoi-Sing Kwok, Vladimir G. Chigrinov
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%. Semiconductor nanorods emit polarized light, which is expected to bring multiple benefits in terms of brightness and color enhancement, for modern liquid-crystal displays (LCDs). Photoaligned nanorod enhancement films for color and polarization conversion for LCD backlights are introduced. The fabrication of mixed and multiple stacked films, with improved color gamut and polarization efficiency, is thus expected to increase the optical efficiency of conventional LCDs by ≈60%.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/adma.201701091

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