CuInS2/ZnS核壳结构量子点的水相制备与性能研究

doi:10.15541/jim20170140

无机材料学报 ›› 2018, Vol. 33 ›› Issue (3): 279-283.DOI: 10.15541/jim20170140

CuInS₂/ZnS核壳结构量子点的水相制备与性能研究

周蓓莹, 陈东, 刘佳乐, 江莞, 罗维, 王连军

东华大学材料科学与工程学院, 纤维材料改性国家重点实验室, 上海 201620

收稿日期:2017-03-28 修回日期:2017-07-05 出版日期:2018-03-20 网络出版日期:2018-03-12
作者简介:周蓓莹(1990-), 女, 博士研究生. E-mail: zhoujio@126.com
基金资助:
国家自然科学基金(51272042)

Preparation and Property of CuInS₂/ZnS Core-shell Quantum Dots in Aqueous Phase

ZHOU Bei-Ying, CHEN Dong, LIU Jia-Le, JIANG Wan, LUO Wei, WANG Lian-Jun

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China

Received:2017-03-28 Revised:2017-07-05 Published:2018-03-20 Online:2018-03-12
About author:ZHOU Bei-Ying. E-mail: zhoujio@126.com
Supported by:
National Natural Science Foundation of China (51272042)

摘要/Abstract

摘要：

因不含Cd、Pb、Te等有毒元素, 且具有在可见光至近红外光波段可调的发光性能, 铜铟硫(CuInS₂)量子点作为一种新型的I-III-VI型三元半导体材料, 广泛应用于分析检测和生物成像等领域。本研究采用一种低毒低温的方法快速合成CuInS₂量子点及其ZnS核壳结构量子点, 不仅利用ZnS带隙较宽且表面缺陷少的特点, 弥补了CuInS₂量子点的劣势, 提高了CuInS₂量子点的发光性能; 同时由于低毒性ZnS壳层的包覆, 进一步降低生物毒性。当Cu∶In摩尔比为1∶1时, CuInS₂量子点于530 nm处出现明显的发射峰, 且随着In含量的增加, 发光峰逐渐红移。包覆ZnS壳层后, CuInS₂量子点的发光强度明显增大, 且谱峰明显红移。当Cu∶Zn比为1∶1, 回流时间为45 min时, 合成的CuInS₂/ZnS量子点发光性能最优。该合成方法节省能源、生产效率高、绿色环保, 具有较大的应用前景。

关键词: CuInS₂, CuInS₂/ZnS, 核壳结构, 水相制备

Abstract:

Owing to the absence of Cd, Pb, Te and other toxic elements, and the widely tunable fluorescence emission spectra from visible to near infrared light, CuInS₂ quantum dots (QDs), as a new type of I-III-VI semiconductor materials, have been applied in biological detection and analysis imaging. In this study a fast and low temperature method was proposed to synthesize CuInS₂ and its ZnS core-shell structure QDs with low toxicity raw materials. The ZnS outer layer suppresses the surface defects to improve the luminescence properties of CuInS₂ QDs, and further reduces biological toxicity. CuInS₂ QDs exhibited an obvious emission peak at 530 nm when the molar ratio of Cu∶In was 1∶1. With the increase of In content, the luminescence peak presents a gradual redshift. After coated with ZnS shell, the luminous intensity of QDs obviously increased and the emission peak red shifted. Further more, when the molar ratio of Cu∶Zn was 1∶1 and the reflux time was 45 min, the luminescent properties of the synthesized CuInS₂/ZnS QDs were optimized. This synthesis method takes the advantages of energy saving, high production efficiency, and excellent environmental friendship, showing wide application potential.

Key words: CuInS₂, CuInS₂/ZnS, core-shell structure, aqueous phase

中图分类号:

TQ174

周蓓莹, 陈东, 刘佳乐, 江莞, 罗维, 王连军. CuInS₂/ZnS核壳结构量子点的水相制备与性能研究[J]. 无机材料学报, 2018, 33(3): 279-283.

ZHOU Bei-Ying, CHEN Dong, LIU Jia-Le, JIANG Wan, LUO Wei, WANG Lian-Jun. Preparation and Property of CuInS₂/ZnS Core-shell Quantum Dots in Aqueous Phase[J]. Journal of Inorganic Materials, 2018, 33(3): 279-283.

图/表 5

图1 CuInS2量子点(a)及CuInS2/ZnS核壳量子点(b)的TEM照片, 插图分别为相应量子点的HRTEM照片

Fig. 1 TEM images of the as-prepared CuInS2 quantum dots (QDs) (a) and CuInS2/ZnS core-shell QDs (b) with insets showing HRTEM images of corresponding QDs

图2 CuInS2、CuInS2/ZnS量子点XRD图谱

Fig. 2 XRD patterns of CuInS2 and CuInS2/ZnS QDs

图3 不同Cu:In摩尔比的CuInS2紫外-可见光吸收(虚线)和光致发光(实线)谱图

Fig. 3 UV-Vis absorption spectra (dotted lines) and photoluminescence spectra (solid lines) of CuInS2 QDs solution with varied molar ratios of Cu:In

图4 不同Cu:Zn摩尔比的CuInS2/ZnS量子点光致发光图谱

Fig. 4 Photoluminescence spectra of the CuInS2/ZnS QDs with different molar ratios of Cu∶Zn

图5 不同反应回流时间的CuInS2/ZnS量子点光致发光谱图

Fig. 5 Photoluminescence spectra of CuInS2/ZnS QDs with different reflux time

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CuInS₂/ZnS核壳结构量子点的水相制备与性能研究

Preparation and Property of CuInS₂/ZnS Core-shell Quantum Dots in Aqueous Phase

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