Influence of Growth Break before Capping on Photoluminescence Dynamics of CdSe/ZnSe Self-Assembled Quantum Dots

• Authors: S. Nowak , J. Suffczyński , M. Goryca , P. Kossacki , J. Gaj , S. Lee , J. Furdyna
• Languages of publication: EN

Abstracts

EN

Influence of growth breaks before capping of CdSe self-assembled quantum dot layers on photoluminescence dynamics was examined in three samples. Short (5s) break resulted only in a small blue shift, caused probably by partial strain relaxation and/or Zn interdiffusion. Long (20 min) break induced a strong broadening and red shift of the spectra, combined with a dramatic slow down of the photoluminescence decays. The main result of the long break was identified as introduction of defects (impurities), which generate local electric fields and act as traps of photogenerated carriers.

Keywords

EN

78.55.Et; 78.67.Hc; 81.07.Ta

Discipline

• 78.67.Hc: Quantum dots
• 78.55.Et: II-VI semiconductors
• 81.07.Ta: Quantum dots

• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 5
• Pages: 1267-1271

Dates

published

2008-11

received

2008-06-07

Contributors

author

S. Nowak

• Institute of Experimental Physics, University of Warsaw, Hoża 69, 00-681 Warszawa, Poland

author

J. Suffczyński

• Institute of Experimental Physics, University of Warsaw, Hoża 69, 00-681 Warszawa, Poland

author

M. Goryca

• Institute of Experimental Physics, University of Warsaw, Hoża 69, 00-681 Warszawa, Poland

author

P. Kossacki

• Institute of Experimental Physics, University of Warsaw, Hoża 69, 00-681 Warszawa, Poland

author

J. Gaj

• Institute of Experimental Physics, University of Warsaw, Hoża 69, 00-681 Warszawa, Poland

author

S. Lee

• Department of Physics, Korea University, Seoul 136-701, Korea

author

J. Furdyna

• Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA

References

• 1. K.P. Korona, P. Wojnar, J.A. Gaj, G. Karczewski, J. Kossut, J. Kuhl, Solid State Commun. 133, 369 (2005)
• 2. J.H. Park, D.G. Choi, T.K. Lee, Eunsoon Oh, Sanghoon Lee, J.K. Furdyna, Appl. Phys. Lett. 90, 201916 (2007)
• 3. J. Jasny, J. Sepioł, Chem. Phys. Lett. 273, 439 (1997)
• 4. S. Maćkowski, Nguyen The Khoi, P. Kossacki, A. Golnik, J.A. Gaj, A. Lemaitre, C. Testelin, C. Rigaux, G. Karczewski, T. Wojtowicz, J. Kossut, J. Cryst. Growth 184/5, 966 (1998)
• 5. S. Lee, I. Daruka, C.S. Kim, A.-L. Barabási, J.L. Merz, J.K. Furdyna, Phys. Rev. Lett. 81, 3479 (1998)

Identifiers

DOI

10.12693/APhysPolA.114.1267