Effect of Precursor Molar Ratio of [S2-]/[Zn2+] on Particle Size and Photoluminescence of ZnS:Mn2+ Nanocrystals
DONG Dong-Qing1, LI Lan1, ZHANG Xiao-Song1,2, HAN Xu1, AN Hai-Ping1
1Institute of Materials Physics, and Tianjin Key Laboratory for Optoelectronic Materials and Devices, Tianjin University of Technology, 3003842Institute of Modern Optics, Nankai University, Tianjin 300071
Effect of Precursor Molar Ratio of [S2-]/[Zn2+] on Particle Size and Photoluminescence of ZnS:Mn2+ Nanocrystals
1Institute of Materials Physics, and Tianjin Key Laboratory for Optoelectronic Materials and Devices, Tianjin University of Technology, 3003842Institute of Modern Optics, Nankai University, Tianjin 300071
摘要We investigate the influence of precursor molar ratio of [S2-]/[Zn2+] on particle size and photoluminescence (PL) of ZnS:Mn2+ nanocrystals. By changing the [S2-]/[Zn2+] ratio from 0.6 (Zn-rich) to 2.0 (S-rich), the particle size increases from nearly 2.7nm to about 4.0nm. The increase in the ratio of [S2-]/[Zn2+] causes a decrease of PL emission intensity of ZnS host while a distinct increase of Mn2+ emission. The maximum intensity for the luminescence of Mn2+ emission is observed at the ratio of [S2-]/[Zn2+]≈1.5. The possible mechanism for the results is discussed by filling of S2- vacancies and the increase of Mn2+ ions incorporated into ZnS lattices.
Abstract：We investigate the influence of precursor molar ratio of [S2-]/[Zn2+] on particle size and photoluminescence (PL) of ZnS:Mn2+ nanocrystals. By changing the [S2-]/[Zn2+] ratio from 0.6 (Zn-rich) to 2.0 (S-rich), the particle size increases from nearly 2.7nm to about 4.0nm. The increase in the ratio of [S2-]/[Zn2+] causes a decrease of PL emission intensity of ZnS host while a distinct increase of Mn2+ emission. The maximum intensity for the luminescence of Mn2+ emission is observed at the ratio of [S2-]/[Zn2+]≈1.5. The possible mechanism for the results is discussed by filling of S2- vacancies and the increase of Mn2+ ions incorporated into ZnS lattices.
DONG Dong-Qing;LI Lan;ZHANG Xiao-Song;HAN Xu;AN Hai-Ping. Effect of Precursor Molar Ratio of [S2-]/[Zn2+] on Particle Size and Photoluminescence of ZnS:Mn2+ Nanocrystals[J]. 中国物理快报, 2007, 24(9): 2661-2663.
DONG Dong-Qing, LI Lan, ZHANG Xiao-Song, HAN Xu, AN Hai-Ping. Effect of Precursor Molar Ratio of [S2-]/[Zn2+] on Particle Size and Photoluminescence of ZnS:Mn2+ Nanocrystals. Chin. Phys. Lett., 2007, 24(9): 2661-2663.
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