Optoelectronics Letters, Volume. 8, Issue 1, 1(2012)
Size influence on the fluorescence decay time of ZnS:Mn2+ nanocrystals
ZnS:Mn2+ nanocrystals (NCs) with particle size from 1.9 nm to 3.2 nm are synthesized via chemical precipitation method with different [S2-]/[Zn2+] ratios. The size??dependent decay for Mn emission exhibits a double exponential behavior. And two lifetime values, in millisecond time domain, can both be shortened with size increasing, which is attributed to enhanced interaction between host and Mn2+ impurity. A molecular structure model is proposed to interpret the tendency of two lifetime components, which is correlated to the number of S vacancy (Vs) defects around Mn2+.
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SONG Jing, ZHANG Gao-feng, XING Tong-yan, XU Jian-ping, ZHANG Xiao-song, HUANG Qing-song. Size influence on the fluorescence decay time of ZnS:Mn2+ nanocrystals[J]. Optoelectronics Letters, 2012, 8(1): 1
Received: Sep. 9, 2011
Accepted: --
Published Online: Jul. 12, 2017
The Author Email: Jing SONG (songjing@zhneolight.com)