Exciton Lifetime in PbS Quantum Dots in Glass


We report experimental measurements and analysis of HOMO-LUMO transition photoluminescence and photoinduced bleaching magnitude and decay kinetics in lead sulfide quantum dots in glass. We find that the radiative lifetime is independent of temperature from 77K to 500K. The lifetime of the HOMO-LUMO state decreases dramatically for T>300K, indicating thermally activated nonradiative recombination. The excitation decay time is much greater than the radiative lifetime and increases monotonically with decreasing temperature with decay times of 2 μs at room temperature and 4-10 μs at 77K.

This is a preview of subscription content, access via your institution.


  1. 1.

    F. Huang, A. Filin, R. Doremus, P.N. Rao, and P.D. Persans, Long-Lifetime Nonlinear Absorption of Pbs Quantum Dots. Mat. Res. Soc. Symp. Proc., 737, (2003) 163.

    CAS  Google Scholar 

  2. 2.

    R.D. Schaller and V.I. Klimov, High Efficiency Carrier Multiplication in Pbse Nanocrystals: Implications for Solar Energy Conversion. Phys. Rev. Lett., 92, (2004) 186601.

    CAS  Article  Google Scholar 

  3. 3.

    R.J. Ellingson, M.C. Beard, J.C. Johnson, P. Yu, A.I. Micic, A.J. Nozik, A. Shabaev, and A.L. Efros, Highly Efficient Multiple Exciton Generation in Colloidal Pbse and Pbs Quantum Dots. Nanoletters, 5, (2005) 865.

    CAS  Article  Google Scholar 

  4. 4.

    A.J. Nozik, Quantum Dot Solar Cells. Physica E-Low-Dimensional Systems & Nanostructures, 14, (2002) 115–120.

    CAS  Article  Google Scholar 

  5. 5.

    M. Califano, A. Zunger, and A. Franceschetti, Efficient Inverse Auger Recombination at Threshold in Cdse Nanocrystals. Nano Letters, 4, (2004) 525–531.

    CAS  Article  Google Scholar 

  6. 6.

    P.D. Persans, A. Filin, F. Huang, A. Vitek, P.G.N. Rao, and R.H. Doremus. Trap Effects in Pbs Quantum Dots. in Quantum Dots, Nanoparticles and Nanowires Symposium, 1–5 Dec. 2003. 2004. Boston, MA, USA: Mater. Res. Soc.

  7. 7.

    R. Espiau de Lamaestre, H. Bernas, D. Pacifici, G. Franzo, and F. Prioli, Evidence for a “Dark Exciton” State of Pbs Nanocrystals in a Silicate Glass. Appl. Phys. Lett., 88, (2006) 181115–2.

    Article  Google Scholar 

  8. 8.

    M. Nirmal, D.J. Norris, M. Kuno, M.G. Bawendi, A.L. Efros, and M. Rosen, Observation of Dark Exciton in Cdse Quantum Dots. Phys. Rev. Lett., 75, (1995) 3728.

    CAS  Article  Google Scholar 

  9. 9.

    P.N. Rao, Cadmium Sulfide and Lead Sulfide Quantum Dots in Glass: Processing, Growth, and Optical Absorption, in Materials Science, Rensselaer Polytechnic Institute: Troy, (2001).

    Google Scholar 

  10. 10.

    F. Huang, Nonlinear Optical Studies of the Properties of Nanoparticles, in Physics, Rensselaer Polytechnic Institute: Troy, (2003) 122.

    Google Scholar 

  11. 11.

    F. Huang, A. Filin, R. Doremus, P. Rao, and P.D. Persans, Long-Lifetime Nonlinear Absorption of Pbs Quantum Dots. Mat. Res. Soc. Symp. Proc., 737, (2003) 163.

    CAS  Google Scholar 

Download references

Author information



Corresponding author

Correspondence to Peter D. Persans.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Persans, P.D., Filin, A., Berry, N.E. et al. Exciton Lifetime in PbS Quantum Dots in Glass. MRS Online Proceedings Library 974, 601 (2006). https://doi.org/10.1557/PROC-0974-CC06-01

Download citation