State Key Laboratory on Advanced Displays and Optoelectronics Technologies, Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.
Department of Physics and Materials Science and Centre for Functional Photonics (CFP), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong.
Adv Mater. 2017 Sep;29(33). doi: 10.1002/adma.201701091. Epub 2017 Jun 28.
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%.
半导体纳米棒（NR）发射偏振光，有望为现代液晶显示器（LCD）带来多方面的好处，包括亮度和颜色增强。在这方面，本文介绍了用于 LCD 背光灯的彩色和偏振转换的光取向纳米棒增强膜（NREF）。光取向层产生的光诱导锚定力刺激 NR 在薄聚合物膜中进行有序的自组装。具有 ≈80%量子产率的绿光和红光 NR 被单向且平面排列，表现出 >7:1 的偏振比和 >0.81 的偏振度。光取向技术促进了混合和多层堆叠 NREF 的制备，从而提高了色域和偏振效率，预计将使传统 LCD 的光学效率提高约 60%。
