Temperature Dependence of Luminescence of CdS:Mn/ZnS Core-Shell Quantum Dots
FANG Dai-Feng1 , WANG Zhong-Ping2 , DAI Ru-Cheng2 , ZHANG Zeng-Ming2** , DING Ze-Jun1
1 Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, University of Science and Technology of China, Hefei 2300262 Centre of Physical Experiments, University of Science and Technology of China, Hefei 230026
Abstract ：Luminescence intensity of CdS:Mn/ZnS core-shell quantum dots (QDs) can be strongly enhanced in comparison with bulk CdS:Mn and nanoparticles, while the luminescence due to the surface state is greatly suppressed by a capping ZnS shell. We find that with the increasing temperature, the peak position of CdS:Mn/ZnS core-shell QDs blue shifts due to the reduction of phonon coupling. Unlike the bulk CdS:Mn, the luminescence of the core-shell QDs is less sensitive to thermal quenching.
出版日期: 2014-04-24
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2014, Vol. 31 
