Photoaligned Nanorod Enhancement Films with Polarized Emission for Liquid‐Crystal‐Display Applications |
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| Authors: | Abhishek K. Srivastava Wanlong Zhang Julian Schneider Andrey L. Rogach Vladimir G. Chigrinov Hoi‐Sing Kwok |
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| Affiliation: | 1. State Key Laboratory on Advanced Displays and Optoelectronics Technologies, Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Kowloon, Hong Kong;2. Department of Physics and Materials Science and Centre for Functional Photonics (CFP), City University of Hong Kong, Kowloon, Hong Kong |
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| Abstract: | 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%. |
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| Keywords: | liquid crystal display liquid crystal polymer photoalignment polarized emission semiconductor nanorods |
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