Eurasian Journal of Physics and Functional Materials

Advanced search

Some radiation effects in II-VI quantum dots

Full Text:


The effect of electron irradiation (E=0.6-1.8 MeV) on the optical characteristics (photoluminescence, PL) of CdTe/ZnTe structures with quantum dots, QDs, was investigated in the temperature range from 4.2 to 250 K. The data on the influence of irradiation on the temperature dependence of PL intensity, energy position and PL line width, W, from QDs were obtained. The narrowing of PL band and the blue shift of the QD peak position are explained by quenching of the low energy component  connected with larger QDs. A slight decrease in PL intensity for both QDs and the buffer ZnTe layer as well as a sharp drop in PL intensity for 1 ML CdTe quantum wells, QWs, and fragments accompanied by a change in the  activation energy of the PL quenching is explained by the radiation defects localized near the QD interface. The obtained results show that under e-beam irradiation QDs are more stable than QWs, which is in agreement
with our previous investigations. 

About the Authors

M. B. Sharibaev
Muhammad al Khorezmi Tashkent University of Information Technologies

Q. A. Ismailov
Karakalpak State University


1. D. Bimberg et al., Quantum dot heterostructures (John Wiley-Sons Ltd., Chichester, 1998) 328 p.

2. O. Brandt et al., Phys. Rev.B. 44(15) (1991) 8043-8051.

3. T.R. Ramachandran et al., Appl. Phys. Lett. 70(5) (1997) 640-642.

4. I. Suemune et al., Appl. Phys. Lett. 71(26) (1997) 3886-3888.

5. H. Kirmse et al., Appl. Phys. Lett. 72(11) (1998) 1329-1331.

6. C. Gourgon et al., J. Cryst. Growth 138(1) (1994) 590-594.

7. Y. Terai et al., Appl. Phys. Lett. 73(25) (1998) 3757-3759.

8. V.V. Zaitsev et al., Phys.Status Solidi 41(3) (1999) 647-654.

9. V.S. Bagaev et al., J. Cryst. Growth 214/215(1) (2000) 250-254,.

10. S. Seto et al., J. Cryst. Growth 138(1/4) (1994) 346-351.

11. A.O. Kosogov et al., Appl. Phys. Lett. 69(20) (1996) 3072-3074.

12. S.J. Xu et al., Appl. Phys. Lett. 72(25) (1998) 3335-3337.

13. A. Patane et al., Abstracts of XXVIII Intern. School on Phys. of Semicond. Compounds Jaszowiec‘99, Ustron-Jaszowiec (1999) 73-75.

14. E.F. Venger et al., SPIE Proceeding 3890 (1998) 537-541.

15. V.I. Kozlovski et al., Sol. Fiz. Techn. Poluprov l. 33(7) (1999) 810-814.

16. H.P. Wagner et al., J. Lumin. 52(6) (1992) 41-53.

17. E.F. Venger et al., Thin Solid Films 367(1, 2) (2000) 184-188.


For citations:

Sharibaev M.B., Ismailov Q.A. Some radiation effects in II-VI quantum dots. Eurasian Journal of Physics and Functional Materials. 2018;2(4):353-359.

Views: 243

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.

ISSN 2522-9869 (Print)
ISSN 2616-8537 (Online)