| Original Articles |
|
|
|
|
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 |
|
| Cite this article: |
|
DONG Dong-Qing, LI Lan, ZHANG Xiao-Song et al 2007 Chin. Phys. Lett. 24 2661-2663 |
|
|
|
|
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.
|
| Keywords:
73.63.Bd
73.63.Kv
74.25.Gz
|
|
|
Received: 30 May 2007
Published: 16 August 2007
|
|
|
|
|
|
|
|
[1] Alivisatos A P 1996 Science 27 933
[2] Brus L E 1984 J. Chem. Phys. 80 4403
[3] Alvarez M M, Khoury J T and Gregory S T 1984 J. Phys.Chem. B 101 3706
[4] Wang Y and Herron N 1991 J. Phys. Chem. 95 525
[5] Bhargava R N, Gallagher D and Hong X 1994 Phys. Rev. Lett. 72 416
[6] Bhargava R N 1996 J. Lumin. 70 85
[7] Willard D M, Carillo L L, Jung J and Orden A V 2001 Nano Lett. 1 469.
[8] Yang H S, Holloway P H and Ratna B B 2003 J. Appl. Phys. 93 586
[9] Ge J P, Wang J W, Zhang H X, Wang X and Peng Q 2005 Adv.Funct. Mater. 15 303
[10] Suyver J F, Wuister S F, Kelly J J and Meijerink A 2001 Nano Lett. 1 429
[11] Kasai P H and Otomo Y 1962 J. Chem. Phys. 37 1263
[12] Weisbuch C and Vinter B 1991 Quantum SemiconductorStructures: Fundamentals and Applications (San Diego: Academic) p 318
[13] Bol1 A A and Meijerink A 1998 Phys. Rev. B 58 15997
[14] Cao L X, Zhang J H and Ren S L 2002 Appl. Phys. Lett. 80 4300
[15] Murase N, Jagannathan R and Kanematsu Y 1999 J. Phys.Chem. B 103 754
[16] Marfunin A S 1979 Spectroscopy, Luminescence and RadiationCenters in Minerals (New York: Academic) p 516
[17] Manzoor K, Vadera S R, Kumar N and Kutty R R N 2003 Mater. Chem. Phys. 82 718
[18] Kopec P J, Canny B and Syfosse G 1983 J. Lumin. 28 319
[19] Sooklal K, Cullum B S and Angel S M 1996 J. Phys. Chem. 100 4551
[20] Erwin S C, Zu L, Haftel M I, Efros A L and Kennedy T A 2005 Nature 436 91 |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
