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Chin J Mater Res  2009, Vol. 23 Issue (1): 89-92    DOI:
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Synthesis and their optical characterizations of CdS quantum dots
SONG Bing;  CHENG Ke;  WU Chao;  DU Zuliang
Key Laboratory for Special Functional Materials of Ministry of Education; Henan University; Kaifeng 475004
Cite this article: 

SONG Bing CHENG Ke WU Chao DU Zuliang. Synthesis and their optical characterizations of CdS quantum dots. Chin J Mater Res, 2009, 23(1): 89-92.

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Abstract  

The 2.5 nm, 3.5 nm and 5.0 nm diameter CdS quantum dots had been synthesized using octadecylamine (ODA) as surfactant and solvent. The size and composition of quantum dots could be adjusted by changing the amount of added sulfur. The size of CdS quantum dots was increased with the increase of sulfur during the synthesis procedure. On the other hand, the excess sulfur will eliminate the sulfur vacancies effectively and suppress the surface state emission. The ODA could passivate the surface states presented on the surface of CdS quantum dots and suppress the surface states emission effectively.

Key words:  inorganic non--metallic materials      CdS      quantum dot      quantum size effects      surface states     
Received:  22 May 2008     
ZTFLH: 

TB321

 
Fund: 

Supported by National Nature Science Foundation of China No.90306010 and CHE--20773103, the Program for New Century Excellent Talents in University No.NCET--04--0653, and the National Key Basic Research and Development Program of China No.2007CB616911.

URL: 

https://www.cjmr.org/EN/     OR     https://www.cjmr.org/EN/Y2009/V23/I1/89

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