Non-Injection Synthesis of CuInS2/ZnS Nanocrystals and the Effect of Hydrophilic Surface Modification on Photoluminescence

作者：Wang Hongzhe; Li Xiaomin; Shen Huaibin; Zhou Changhua; Li Lin Song^*

来源：Science of Advanced Materials, 2013, 5(1): 51-56.

DOI：10.1166/sam.2013.1430

• CuInS2/ZnS
• Nanocrystals
• Surface Modification

We proposed a facile non-injection method for the synthesis of CuInS2/ZnS nanocrystals by using metal acetylacetonate complexes as the universal metal precursors in 1-dodecanethiol, and 1-dodecanethiol was used both as solvent and the only source of sulfur. This method eliminated the use of phosphines for the preparation of copper and indium precursors. ZnS shell was introduced to enhance the photoluminescence and stability of the as-synthesized CuInS2 nanocrystals. This shell growth process not only increased the quantum yields of CuInS2 nanocrystals but also provided an effective way to continuously tune the emissions from similar to 665 nm to similar to 575 nm. This non-toxic core shell system could be easily transferred into water by surface modification treatment with bioconnpatible carboxylic acid groups, which dropped the emission intensity for about 30% while this water-soluble characteristic made such nanoscrystals meet the basic requirement for biological imaging applications. We also proved the feasibility of such method for the synthesis of other ternary I-III-VI2 nanocrystals such as CuInSe2 and AgInSe2.

• 出版日期2013-1
• 单位河南大学