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南阳理工学院 电子与电气工程学院, 河南 南阳 473000
纸质出版日期:2018-4-5,
网络出版日期:2017-10-25,
收稿日期:2017-7-20,
修回日期:2017-10-17,
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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.
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
2
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
2
BA来实现蓝光发射。
MB
2
BA/ZnO nanocomposites with different mass fraction of liquid crystal N-(4-methoxybenzylidene)-4-ethoxybenzenamine(MB
2
BA) were successfully prepared by ultrasonic dispersing technology. The prepared MB
2
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
2
BA is about to form a blue emission band with its peak located at about 418 nm when the concentration of MB
2
BA in ZnO is up to 80%. By increasing the concentration of MB
2
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
2
BA with ZnO nanocrystals.
氧化锌超声波分散技术光致发光
ZnOultrasonic dispersing technologyphotoluminescence
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