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Citation: WANG Yan, HOU Yan-Bing, TANG Ai-Wei, FENG Bin, LI Yan, TENG Feng. Synthesis and Optical Properties of Water-Soluble CdTe Nanocrystals[J]. Acta Physico-Chimica Sinica, ;2008, 24(02): 296-300. doi: 10.3866/PKU.WHXB20080219 shu

Synthesis and Optical Properties of Water-Soluble CdTe Nanocrystals

1.
Key Laboratory of Luminescence and Optical Information of the Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, P. R. China

Received Date: 11 July 2007
Available Online: 13 December 2007

CdTe nanocrystals were synthesized in aqueous solution with different stabilizers (L-cysteine hydrochloride (L-Cys), 3-mercaptopropionic acid (MPA), 1-thioglycerol (TG), and thioglycolic acid (TGA)) by a simple route, and were characterized by transmission electron microscopy (TEM), X-ray photoelectron spectra (XPS), and X-ray diffraction pattern (XRD). The effect of aqueous synthesis conditions on the optical properties of CdTe nanocrystals was investigated and it was found that the molar ratio of Cd/Te, pH value, refluxing time, and different stabilizers significantly affected the optical properties of CdTe nanocrystals. The obtained CdTe nanocrystals exhibited a favorable narrow emission band under different conditions. The photoluminescence (PL) peaks and absorption peaks could be tuned by changing the synthesis conditions of CdTe nanocrystals. Different PL quantum yields (QY) were obtained using different stabilizers. The PL peak position of CdTe nanocrystals did not show significant shift under different excitation wavelengths.
- CdTe; Nanocrystals; Optical property; Photoluminescence
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