Luminescence and local structure of Mn-doped ZnS hybrid crystal with two-dimensional platelet morphology

• Published in: Chemical physics letters Vol. 468; no. 4; pp. 253 - 256
• Main Authors: Jang, Jum Suk, Choi, Sun Hee, Kim, Eun Sun, Lee, Jae Sung, Shin, Namsoo, Lee, Dong Ryeol
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 22.01.2009
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/j.cplett.2008.12.045

Mn-doped ZnS hybrid crystals with two-dimensional platelet morphology exhibit an optimum photoluminescence at a Mn/Zn atomic ratio of 0.2. The effect of Mn concentration is attributed to change in the local structure around Mn. Mn-doped ZnS hybrid crystals with two-dimensional platelet morphology were prepared and their luminescence properties were studied with the variation of Mn concentration. The photoluminescence derived from Mn 2+ increased with increasing Mn concentration to x = 0.2 in Zn 1− x Mn x S(en) 0.5 (en = ethylenediamine), but further increase reduced the photoluminescence. According to structural study by synchrotron X-ray techniques, the bond distances of Mn–N and Mn–S were longer than those of Zn–N and Zn–S in ZnS(en) 0.5, respectively. Manganese atoms were most highly doped into tetrahedral Zn sites without impurities at x = 0.2, where the maximum photoluminescence was observed.