The Optical Property of Mn- Doped ZnS Nanoparticles Synthesized by a Co-precipitation Method
Keywords:Co-precipitation, nanoparticles, photoluminescence, photoluminescence excitation
By a co-precipitation method, we have synthesized Mn-doped ZnS nanoparticles with the Mn contents of 2-12 mol%from solutions Zn(CH3COO)2 0.1M, Mn(CH3COO)2 0.1M and Na2S 0.1M. XRD patterns, TEM images show these nanoparticles possess cubic crystalline structure with average size about of 3-4 nm. Photoluminescence spectra of samples present a broad yellow-orange band of 603 nm, its intensity increases with the increasing of Mn content from 2 mol% to 8 mol % when the excitation power density increases from 0.06 W/cm2 to 0.21 W/cm2. However, while the intensity increases with the increasing of Mn content its position is almost unchanged. This band is attributed to the radiativetransition of electron in 3d5unfulfilled shell of Mn2+ ions [4T1(4G)→ 6A1(6S). The absorption spectra show main bands at 308-328 nm with strong intensity related to absorption near band edge of ZnS crystal. These bands related to Mn2+ absorption also appeared with weaker intensity. The photoluminescence excitation spectra monitored at the yellow-orange band exhibited a band at 354 nm with strong intensity and bands at 432, 466, 497 nm with weaker intensity.The band of 354 nm is attributed to the absorption near band edge. Simultaneously, the bands of 432, 466, 497 nm are attributed to the absorption transitions of electrons from ground state 6A1(6S) to excited states 4T2(4D), 4A1(4G) - 4E(4G), 4T2(4G) of Mn2+ions in ZnS crystal, respectively.
How to Cite
LicenseAuthors who publish with CIP agree with the following terms:
- The manuscript is not under consideration for publication elsewhere. When a manuscript is accepted for publication, the author agrees to automatic transfer of the copyright to the editorial office.
- The manuscript should not be published elsewhere in any language without the consent of the copyright holders. Authors have the right to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal’s published version of their work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are encouraged to post their work online (e.g., in institutional repositories or on their websites) prior to or during the submission process, as it can lead to productive exchanges or/and greater number of citation to the to-be-published work (See The Effect of Open Access).