Influence of Reaction Time on Optical Property of ZnS - Mn Nanoparticles Synthesized by a Hydrothermal Method

ZnS:Mn (CMn = 5 %mol) nanoparticles have been synthesized by a hydrothermal method from solutions of Zn(CH3COO)2 0.1 M, Na2S2O3 0.1 M and Mn(CH3COO)2 0.01 M at 220oC for different reaction time. The result showed that increasing reaction time from 3 to 30h almost does not change cubic crystalline structure, peak positions attributed to Mn2+ ions at 585 nm in photoluminescence spectra and 392, 430, 463, 468, 492 nm in photoluminescence excitation spectra when monitoring the 585 nm band of ZnS:Mn nanoparticles but only slight increases lattice constant, the average particle size and changing their intensity. As increasing the reaction time from 3 to 10h, intensity of bands attributed to Mn2+ ions also increase, reaches the maximum at 15h and then decreases as increasing reaction time to 30 h. Cause of these phenomena have been investigated and reported.

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Nguồn http://repository.vnu.edu.vn/
Tác giả Pham Van Ben, Bui Hong Van
Người bảo dưỡng Đại học Quốc gia Hà Nội
Last Updated Tháng 8 16, 2018, 10:05 (ICT)
Được tạo ra Tháng 4 11, 2018, 10:33 (ICT)