Synthesis of cadmium-free quantum dots based on CuInS2 nanocrystals

被引：0
作者：
Novikov, Anastasiya S. [1 ]
Goftman, Valentina V. [1 ,2 ]
Goryacheva, Irina Y. [1 ,3 ]
机构：
[1] Saratov NG Chernyshevskii State Univ, Astrakhanskaya Str 83, Saratov 410018, Russia
[2] Univ Ghent, Ottergemsesteenweg 460, B-9000 Ghent, Belgium
[3] St Petersburg State Univ, Univ Skii Pr 26, St Petersburg 198504, Russia
来源：
SARATOV FALL MEETING 2015 THIRD INTERNATIONAL SYMPOSIUM ON OPTICS AND BIOPHOTONICS; AND SEVENTH FINNISH-RUSSIAN PHOTONICS AND LASER SYMPOSIUM (PALS) | 2016年 / 9917卷
关键词：
quantum dots; cadmium-free; nanocrystals; photoluminescence; quantum yield; emission; synthesis; absorption; SEMICONDUCTOR NANOCRYSTALS; NANOPARTICLES;
D O I：
10.1117/12.2229852
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We report an efficient synthesis of the Cd-free CuInS2/ZnS (CIS/ZnS) quantum dots (QDs) using low toxic precursors and the investigation of their optical properties. The nanocrystals (NCs) have been obtained via reaction between the acetate salts of the corresponding metals and elemental sulfur in the presence of dodecanethiol in octadecene media at 220 degrees C. The influence of various experimental parameters, including temperature, time,ratio of precursors for CuInS2 was investigated. It was shown that the maximum of photoluminescence (PL) emission wavelength can be tuned by the changing of the stoichiometric ratio of the components. The CIS NCs showed quite low PL quantum yield (QY). In order to increase the QY of these QDs, the process of covering with ZnS shells was performed. During shelling process, the compensation of the surface defects of QDs cores leaded to increase of the QY and blue shift of emission maximum were detected.
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页数：7
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