Changchun Institute of Optics,Fine Mechanics and Physics,CAS
Thermal stability of Mn2+ ion luminescence in Mn-doped core-shell quantum dots | |
Yuan X.; Zheng J. J.; Zeng R. S.; Jing P. T.; Ji W. Y.; Zhao J. L.; Yang W. Y.; Li H. B. | |
2014 | |
发表期刊 | Nanoscale |
ISSN | ISBN/2040-3364 |
卷号 | 6期号:1页码:300-307 |
摘要 | The thermal stability of luminescence is important for the application of quantum dots (QDs) in lightemitting devices. The temperature-dependent photoluminescence (PL) intensities and decay times of Mn-doped ZnS, ZnSe, and ZnSeS alloyed core-shell QD films were studied in the temperature range from 80 to 500 K by steady-state and time-resolved PL spectroscopy. It was found that the thermal stability of Mn-doped QD emissions was significantly dependent on the shell thickness and the host bandgap, which was higher than that of workhorse CdSe QDs. Nearly no PL quenching took place in Mn: ZnS QDs with a thick ZnS shell, which kept a high PL quantum yield (QY) of similar to 50% even at 500 K; and the thermally stable PL was also observed in highly luminescent Mn: ZnSe and Mn: ZnSeS QDs with a quenching temperature over 200 degrees C. Further, the stability of Mn-doped QDs with different shell thickness at high temperature was also examined through heating-cooling cycling experiments. The PL quenching in the thick shell-coated Mn-doped QDs was almost totally recovered. The PL quenching mechanisms of the Mn2+ ion emissions were discussed. |
收录类别 | SCI ; EI |
语种 | 英语 |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ciomp.ac.cn/handle/181722/44470 |
专题 | 中科院长春光机所知识产出 |
推荐引用方式 GB/T 7714 | Yuan X.,Zheng J. J.,Zeng R. S.,et al. Thermal stability of Mn2+ ion luminescence in Mn-doped core-shell quantum dots[J]. Nanoscale,2014,6(1):300-307. |
APA | Yuan X..,Zheng J. J..,Zeng R. S..,Jing P. T..,Ji W. Y..,...&Li H. B..(2014).Thermal stability of Mn2+ ion luminescence in Mn-doped core-shell quantum dots.Nanoscale,6(1),300-307. |
MLA | Yuan X.,et al."Thermal stability of Mn2+ ion luminescence in Mn-doped core-shell quantum dots".Nanoscale 6.1(2014):300-307. |
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