SYNTHESIS AND CHARACTERIZATION OF CdTe QUANTUM DOTS BY ONE-STEP METHOD

被引：8
|
作者：
Wang, Yilin [1 ,2 ]
Wang, Rongfang [2 ]
Liu, Shengyan [2 ]
Yang, Kun [2 ]
Zhou, Liya [2 ]
Li, Huaimei [2 ]
机构：
[1] Guangxi Univ, Minist Prov Jointly Constructed Cultivat Base, State Key Lab Proc Nonferrous Met & Featured Mat, Nanning 530004, Guangxi Zhuang, Peoples R China
[2] Guangxi Univ, Sch Chem & Chem Engn, Nanning 530004, Peoples R China
来源：
BULLETIN OF THE CHEMICAL SOCIETY OF ETHIOPIA | 2013年 / 27卷 / 03期
关键词：
Semicondutor nanocrystal; Chemical synthesis; Optical properties; Luminescence; THIOGLYCOLIC ACID; NANOCRYSTALS; FLUORESCENCE;
D O I：
10.4314/bcse.v27i3.7
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
L-Cysteine (Cys)-capped CdTe quantum dots (QDs) were prepared when sodium tellurite worked as a tellurium source and sodium borohydride acted as a reductant. The influences of various experimental variables, including pH values, Cd/Te and Cd/Cys molar ratios, on the photoluminescence (PL) quantum yield (QY) of the obtained CdTe QDs have been systematically investigated. Experimental results indicated that green to red emitting CdTe QDs with maximum quantum yield of 19.4% can be prepared at pH 11.5 and n((Cd2+)):n((Te2-)):n((Cys)) = 1:0.07:2.0. X-Ray powder diffraction (XRD) and transmission electron microscopy (TEM) were used to characterize the crystal structure and shape of CdTe QDs. The results showed that the prepared CdTe QDs were of cubic zinc blend crystal structure in a sphere-like shape.
引用
收藏
页码：387 / 393
页数：7
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