Vol. 25 No. 4 (2015)
Papers

Influence of Polyvinyl Pyrrolidone on Absorption and Radiation Transitions of Mn\(^{2 + }\) ions in Mn-doped ZnS Nanoparticles

Dang Van Thai
Hanoi University of Science, Vietnam National University, Hanoi
Bio
Pham Van Thang
Hanoi University of Science, Vietnam National University, Hanoi
Pham Van Ben
Hanoi University of Science, Vietnam National University, Hanoi
Bui Hong Van
Hanoi University of Science, Vietnam National University, Hanoi
Tran Minh Thi
Hanoi National University of Education
Hoang Nam Nhat
Faculty of Engineering Physics and Nano Technology, University of Engineering and Technology, Vietnam National University, Hanoi

Published 09-03-2016

Keywords

  • nanoparticles,
  • absorption,
  • photoluminescence,
  • photoluminescence excitation

How to Cite

Thai, D. V., Thang, P. V., Ben, P. V., Van, B. H., Thi, T. M., & Nhat, H. N. (2016). Influence of Polyvinyl Pyrrolidone on Absorption and Radiation Transitions of Mn\(^{2 + }\) ions in Mn-doped ZnS Nanoparticles. Communications in Physics, 25(4), 349. https://doi.org/10.15625/0868-3166/25/4/5062

Abstract

ZnS:Mn nanoparticles were synthesized by co-precipitation method from the precursors solutions of 0.1M Zn(CH\(_{3}\)COO)\(_{2}\), Na\(_{2}\)S and Mn(CH\(_{3}\)COO)\(_{2}\) then were capped with polyvinyl pyrrolidone. The XRD patterns showed that the ZnS:Mn nanoparticles possessed the \(T_d^2 - F4\bar {3}m\) cubic structure with the average crystallite size of several nanometers. At 300~K, the obtained photoluminescence spectra showed only a wide yellow-orange band centered at 603 nm, which should be attributed to the radiation transition of [\(^{4}\)T\(_{1}(^{4}\)G)\( \to ^{6}\)A\(_{1}(^{6}\)S)] of Mn\(^{2 + }\)(3d\(^{5})\) cations in the ZnS matrix. The excitation spectra recorded at 300 K on the other hand featured a strong photoluminescence band around 310-334 nm, which were assigned to the near band-edge absorption transition of ZnS host lattice, in addition with three weaker bands relating to the absorption transitions of [\(^{6}\)A\(_{1}(^{6}\)S) \( \to \) \(^{4}\)T\(_{2}(^{4}\)D)]: 430 nm, [\(^{6}\)A\(_{1}(^{6}\)S) \( \to \) \(^{4}\)A\(_{1}(^{4}\)G) -- \(^{4}\)E(\(^{4}\)G)]: 468 nm, and [\(^{6}\)A\(_{1}(^{6}\)S) \( \to  ^{4}\)T\(_{2}(^{4}\)G)]: 498 nm of Mn\(^{2 + }\)(3d\(^{5})\) cations. It was shown that the capping affected only the intensities of emissions bands.

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