Progress in photo-induced semiconductor quantum rods alignment

Wan-long ZHANG; Abhishek SRIVASTAVA; Andrey ROGACH; Hoi-sing KWOK

doi:10.3788/YJYXS20203505.0409

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Progress in photo-induced semiconductor quantum rods alignment

Materials and Devices | 更新时间：2020-08-12

- Progress in photo-induced semiconductor quantum rods alignment
- Chinese Journal of Liquid Crystals and Displays Vol. 35, Issue 5, Pages: 409-421(2020)
- 作者机构：
  
  1.香港科技大学先进显示与光电子技术国家重点实验室, 香港 999077
  2.香港城市大学功能光子研究中心, 香港 999077
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20203505.0409
  CLC： TN141.9;TH691.9
- Received：10 December 2019，
  
  Revised：23 February 2020，
  
  Accepted：23 February 2020，
  
  Published：05 May 2020
- 稿件说明：
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Wan-long ZHANG, Abhishek SRIVASTAVA, Andrey ROGACH, et al. Progress in photo-induced semiconductor quantum rods alignment[J]. Chinese journal of liquid crystals and displays, 2020, 35(5): 409-421.
DOI：

Wan-long ZHANG, Abhishek SRIVASTAVA, Andrey ROGACH, et al. Progress in photo-induced semiconductor quantum rods alignment[J]. Chinese journal of liquid crystals and displays, 2020, 35(5): 409-421. DOI： 10.3788/YJYXS20203505.0409.

摘要

介绍了液晶分子的光控取向技术和半导体量子棒均匀定向的方法。该方法可以将高亮度、核/壳结构的CdSe/CdS量子棒与液晶单体相互结合，通过定向排列液晶单体来实现对量子棒的定向排列，并利用紫外光聚合固化，形成包裹量子棒的液晶聚合物薄膜。通过对高偏振荧光量子棒的光学表征，展现出高排列序参数。在应用方面，液晶聚合物中的量子棒可在微米尺度（低至2 μm）内进行多畴取向，展现出在光子学和保密领域中的应用前景；结合量子棒/液晶聚合物（QR/LCP）薄膜与液晶显示技术，可用于新式光学驱动荧光显示设备；用于现代液晶显示设备中的量子棒亮度增益膜，在增强色彩表现（>100% NTSC）的同时，又能提高显示器的光学效率（>8%）。

Abstract

The method to unidirectionally align semiconductor quantum rods (QRs) by the photo-induced alignment technique is disclosed

which has originally been developed for the alignment of liquid crystals. It is shown that the strategy facilitates the alignment of highly luminescent CdSe/CdS core/shell QRs in the aligned liquid crystal monomer (LCM)

obtaining solid QRs in liquid crystal polymer (LCP) matrix after UV polymerization. Optical and characterization reveals QRs alignment with highly polarized emission

indicating the high order parameter. In application aspects

the microscale (down to 2 μm domain size) pattern alignments of QRs in LCP matrix show potential in photonic and security areas; the combination of QR/LCP composite film with liquid crystal technology present the new photo-emissive displays; the QR enhancement film improves both color performance (>100% NTSC) and optical efficiency (> 8%) for modern liquid crystal display applications.

关键词

Keywords

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