Khosravi, Ali Azam ; Kundu, Manisha ; Jatwa, Lalita ; Deshpande, S. K. ; Bhagwat, U. A. ; Sastry, Murali ; Kulkarni, S. K. (1995) Green luminescence from copper doped zinc sulphide quantum particles Applied Physics Letters, 67 (18). pp. 2702-2704. ISSN 0003-6951
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Official URL: http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arn...
Related URL: http://dx.doi.org/10.1063/1.114298
Abstract
Free-standing powder of zinc sulphide quantum particles has been synthesized using a chemical route. X-ray diffraction analysis shows that the diameter of the particles is ~21±2 Å which is smaller than the Bohr exciton diameter for zinc sulphide. UV absorption shows an excitonic peak centered at ~300 nm corresponding to an energy gap of 4.1±0.1 eV. These particles show a luminescence band at ~424 nm. The quantum particles could be doped with copper during synthesis without altering the UV absorption or x-ray diffraction pattern. However, doping shifted the luminescence to 480 nm, green wavelength in the visible region.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Institute of Physics. |
| ID Code: | 18015 |
| Deposited On: | 17 Nov 2010 13:20 |
| Last Modified: | 04 Jun 2011 09:01 |
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