Tunable Emission Colours from Liquid Crystal/ZnO Nanocomposites

CHEN Lan-li; LIU Bin; SHI Ming-ji

doi:10.3788/fgxb20183904.0562

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Tunable Emission Colours from Liquid Crystal/ZnO Nanocomposites

更新时间：2020-08-12

- Tunable Emission Colours from Liquid Crystal/ZnO Nanocomposites
- Chinese Journal of Luminescence Vol. 39, Issue 4, Pages: 562-567(2018)
- 作者机构：
  
  南阳理工学院电子与电气工程学院, 河南南阳 473000
- 作者简介：
- 基金信息：
  
  Supported by Natural Science Foundation of Henan Province(122300410205);Science an
- DOI：10.3788/fgxb20183904.0562
  CLC： O482.31
- Received：20 July 2017，
  
  Revised：17 October 2017，
  
  Published Online：25 October 2017，
  
  Published：05 April 2018
- 稿件说明：
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陈兰莉, 刘斌, 石明吉. 液晶-氧化锌纳米复合材料的可调发光[J]. 发光学报, 2018,39(4): 562-567

CHEN Lan-li, LIU Bin, SHI Ming-ji. Tunable Emission Colours from Liquid Crystal/ZnO Nanocomposites[J]. Chinese Journal of Luminescence, 2018,39(4): 562-567
陈兰莉, 刘斌, 石明吉. 液晶-氧化锌纳米复合材料的可调发光[J]. 发光学报, 2018,39(4): 562-567 DOI： 10.3788/fgxb20183904.0562.

CHEN Lan-li, LIU Bin, SHI Ming-ji. Tunable Emission Colours from Liquid Crystal/ZnO Nanocomposites[J]. Chinese Journal of Luminescence, 2018,39(4): 562-567 DOI： 10.3788/fgxb20183904.0562.

摘要

采用超声波分散技术，选用氧化锌纳米晶体和液晶（N-（4-methoxybenzylidene）-4-ethoxybenzenamine），制成液晶质量分数分别为10%、20%、30%、40%、50%、60%、70%、80%的液晶-氧化锌纳米复合材料。通过X射线衍射仪、透射电子显微镜、光致发光光谱仪对样品进行表征。实验结果表明：当液晶MB

BA在氧化锌纳米晶体的质量分数从0增加到80%时，氧化锌纳米复合材料的PL光谱峰值最终移到了418 nm的蓝光区域。随着氧化锌纳米晶体中液晶分子的增加，氧化锌纳米晶体的表面缺陷减少、其深层发光明显削弱，氧化锌纳米晶体的光致发光可以由最初的黄绿色转变为蓝色。因此，可以在氧化锌纳米晶体中通过添加适量的液晶MB

BA来实现蓝光发射。

Abstract

BA/ZnO nanocomposites with different mass fraction of liquid crystal N-(4-methoxybenzylidene)-4-ethoxybenzenamine(MB

BA) were successfully prepared by ultrasonic dispersing technology. The prepared MB

BA/ZnO nanocomposites were characterized by X-ray diffraction(XRD)

transmission electron microscopy(TEM) and photoluminescence(PL) spectroscopy

respectively. The experimental results show that the UV emission of ZnO nanocrystals and PL of the MB

BA is about to form a blue emission band with its peak located at about 418 nm when the concentration of MB

BA in ZnO is up to 80%. By increasing the concentration of MB

BA in ZnO nanocrystals

deep-level luminescence obviously weakened with reducing the surface defects of the ZnO nanocrystals

and the originally yellow-green photoluminescence of the ZnO nanocrystals can be tuned to blue. Our results demonstrate that the blue colored photoluminescence can be achieved by mixing appropriate amount of MB

BA with ZnO nanocrystals.

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Keywords

references

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