A 1550 nm PbS semiconductor quantum dots fiber amplifier based on SiO2 sol-gel method

2011 ◽  
Author(s):  
Xiaolan Sun ◽  
Chao Li ◽  
Libin Xie ◽  
Xiaohong Liu ◽  
Yanhua Dong
Keyword(s):  
Quantum Dots ◽  
Sol Gel ◽  
Fiber Amplifier ◽  
Semiconductor Quantum Dots ◽  
Gel Method ◽  
Sol Gel Method

Studies on Optical Properties of CdS/ZnO Quantum Dots Prepared by Sol-Gel Method

2011 ◽  
Vol 364 ◽  
pp. 129-133 ◽  
Author(s):  
Liyana Mohd Lawi Ruhana ◽  
Taqiyuddin Mawardi Ayob Muhammad ◽  
Radiman Shahidan ◽  
Irman Abdul Rahman ◽  
Bohari M. Yamin
Keyword(s):  
Quantum Dots ◽  
Sol Gel ◽  
Emission Spectra ◽  
Blue Shift ◽  
Mixture Ratio ◽  
Gel Method ◽  
Sol Gel Method ◽  
Transmission Electron ◽  
Zno Quantum Dots ◽  
Zno Qds

CdS/ZnO quantum dots (QDs) were prepared at a temperature of 293 K by the sol-gel method with Triethanolamine (TEA) as a capping agent. The effect of CdS/ZnO mixture ratio of 1:9, 1:1 and 9:1 on the optical absorption and fluorescence spectra were investigated by UV-Vis and Fluorescence spectroscopy. By increasing ZnO composition, a blue-shift of absorption edge and emission spectra were observed. The band gap for 1:9, 1:1 and 9:1 were found to be 4.13, 3.93 and 3.11 eV, respectively. The morphology of the CdS/ZnO QDs for each mixing ratio was obtained by transmission electron microscope (TEM). The size of the QDs was found to be in the range of 5-10 nm with some agglomerated particles.

A sol–gel method for preparing ZnO quantum dots with strong blue emission

2011 ◽  
Vol 131 (10) ◽  
pp. 2072-2077 ◽  
Author(s):  
Zhong Chen ◽  
Xiao Xia Li ◽  
Guoping Du ◽  
Nan Chen ◽  
Andy Y.M. Suen
Keyword(s):  
Quantum Dots ◽  
Sol Gel ◽  
Blue Emission ◽  
Gel Method ◽  
Sol Gel Method ◽  
Strong Blue Emission ◽  
Zno Quantum Dots
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