Journal of Fluorescence

, Volume 21, Issue 5, pp 1913–1919 | Cite as

Photo-Degradation Study of CdTe Nanocrystals by Fluorescence Measurement

Original Paper
First Online:
Received:
Accepted:

Abstract

The photo-degradation of green-, yellow-, orange- and red-emitting CdTe nanocrystals (NCs) in sol–gel SiO2 films was investigated quantitatively by measuring the PL efficiency as a function of the irradiation intensity. The degradation behaviors of the NCs depended strongly on the particle size and the surface state. Green- and yellow-emitting CdTe NCs exhibited a red-shifted PL peak wavelength and decreased PL efficiency after irradiation. In contrast, the PL peak wavelength of red-emitting CdTe NCs remained unchange and their PL efficiency increased. Furthermore, the degraded degree of green-emitting NCs depended linearly on the irradiation intensity \( \left( {{\text{rate}}\,{\text{constant}}\,{k_{{1}}} = \left( {{1}.{1}0\pm 0.0{4}} \right) \times {1}{0^{{ - {6}}}}\,{\text{photon}}} \right) \), whereas hat of red-emitting NCs showed a quadratic dependence \( \left( {{\text{rate}}\,{\text{constant}}\,{k_{{2}}} = \left( {{2}.{26}\pm 0.{1}} \right) \times {1}{0^{{ - {26}}}}\left( {{\text{c}}{{\text{m}}^{{2}}}\,{\text{s}}} \right)/{\text{photon}}} \right) \) at room temperature. This is ascribed to the different surface state of green- and red-emitting CdTe NCs.

Keywords

Nanocrystals Photoluminescence Photo-degradation Silica Film 
This is a preview of subscription content, log in to check access.

Notes

Acknowledgements

This work was supported in part by the Program for Taishan Scholars, projects from National Science Foundation of China (21071061 and 50972081), and projects from Natural Science Foundation of Shandong Province (ZR2010EZ001 and Y2008F32).

References

  1. 1.
    Lupo MG, Sala FD, Carbone L, Zavelani-Rossi M, Fiore A, Lüer L, Polli D, Cingolani R, Manna L, Lanzani G (2008) Ultrafast electron-hole dynamics in cores-shell CdSe/CdS dot/rod nanocrystals. Nano Lett 8:4582–4587PubMedCrossRefGoogle Scholar
  2. 2.
    Piven N, Susha AS, Döblinger M, Rogach AL (2008) Aqueous synthesis of alloyed CdSexTe1-x anocrystals. J Phys Chem C 112:15253–15259CrossRefGoogle Scholar
  3. 3.
    Behrendt JM, Afzaal M, Alexander LM, Bradley M, Hine AV, Nagel D, O’Brien P, Preslandb K, Sutherland AJ (2009) Thiol-containing microspheres as polymeric ligands for the immobilisation of quantum dots. J Mater Chem 19:215–221CrossRefGoogle Scholar
  4. 4.
    Wang C, Zhang H, Zhang J, Lv N, Li M, Sun H, Yang B (2008) Ligand dynamics of aqueous CdTe nanocrystals at room temperature. J Phys Chem C 112:6330–6336CrossRefGoogle Scholar
  5. 5.
    He Y, Sai LM, Lu HT, Hu M, Lai MY, Fan QL, Wang LH, Huang W (2007) Microwave-assisted synthesis of water-dispersed CdTe nanocrystals with high luminescent efficiency and narrow size distribution. Chem Mater 19:359–365CrossRefGoogle Scholar
  6. 6.
    Dong C, Qian H, Fang N, Ren J (2006) Study of fluorescence quenching and dialysis process of CdTe quantum dots, using ensemble techniques and fluorescence correlation spectroscopy. J Phys Chem B 110:11069–11075PubMedCrossRefGoogle Scholar
  7. 7.
    Talapin DV, Rogach AL, Shevchenko EV, Kornowski A, Haase M, Weller H (2002) Dynamic distribution of growth rates within the ensembles of colloidal II−VI and III−V semiconductor nanocrystals as a factor governing their photoluminescence efficiency. J Am Chem Soc 124:5782–5790PubMedCrossRefGoogle Scholar
  8. 8.
    Gaponik NP, Talapin DV, Rogach AL, Hoppe K, Shevchenko EV, Kornowski A, Eychmüller A, Weller H (2002) Thiol-capping of CdTe nanocrystals: an alternative to organometallic synthetic routes. J Phys Chem B 106:7177–7185CrossRefGoogle Scholar
  9. 9.
    Bao H, Gong Y, Li Z, Gao M (2004) Enhancement effect of illumination on the photoluminescence of water-soluble CdTe nanocrystals: toward highly fluorescent CdTe/CdS core−shell structure. Chem Mater 16:3853–3859CrossRefGoogle Scholar
  10. 10.
    Bol AA, Meijerink A (2001) Luminescence quantum efficiency of nanocrystalline ZnS:Mn2+: 2. enhancement by UV irradiation. J Phys Chem B 105:10203–10209CrossRefGoogle Scholar
  11. 11.
    Aldana J, Wang YA, Peng X (2001) Photochemical instability of CdSe nanocrystals coated by hydrophilic thiols. J Am Chem Soc 123:8844–8850PubMedCrossRefGoogle Scholar
  12. 12.
    Murase N, Yang P, Li C (2005) Quantitative analysis of the photodegradation of emitting CdTe nanocrystals dispersed in glass films. J Phys Chem B 109:17855–17860PubMedCrossRefGoogle Scholar
  13. 13.
    Wolcott A, Gerion D, Visconate M, Sun J, Schwartzberg A, Chen S, Zhang JZ (2006) Silica-coated CdTe quantum dots functionalized with thiols for bioconjugation to IgG proteins. J Phys Chem B 110:5779–5789PubMedCrossRefGoogle Scholar
  14. 14.
    Murase N, Li C (2008) Consistent determination of photoluminescence quantum efficiency for phosphors in the form of solution, plate, thin film, and powder. J Lumin 128:1896–1903CrossRefGoogle Scholar
  15. 15.
    Grabolle M, Spieles M, Lesnyak V, Gaponik N, Eychmüller A, Resch-Genger U (2009) Determination of the fluorescence quantum yield of quantum dots: suitable procedures and achievable uncertainties. Anal Chem 81:6285–6294CrossRefGoogle Scholar
  16. 16.
    Ludwigs S, Böker A, Voronov A, Rehse N, Magerle R, Krausch G (2003) Self-assembly of functional nanostructures from ABC triblock copolymers. Nature Mater 2:744–747CrossRefGoogle Scholar
  17. 17.
    Reece TJ, Ducharme S, Sorokin AV, Poulsen M (2003) Nonvolatile memory element based on a ferroelectric polymer Langmuir–Blodgett film. Appl Phys Lett 82:142–144CrossRefGoogle Scholar
  18. 18.
    Kotov NA, Dekany I, Fendler JH (1995) Layer-by-layer self-assembly of polyelectrolyte- semiconductor nanoparticle composite films. J Phys Chem 99:13065–13069CrossRefGoogle Scholar
  19. 19.
    Harrison MT, Kershaw SV, Rogach AL, Kornowski A, Eychmüller A, Weller H (2000) Wet chemical synthesis of highly luminescent HgTe/CdS core/shell nanocrystals. Adv Mater 12:123–125CrossRefGoogle Scholar
  20. 20.
    Cordero SR, Carson PJ, Estabrook RA, Strouse GF, Buratto SK (2000) Photo-activated luminescence of CdSe quantum dot monolayers. J Phys Chem B 104:12137–12142CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.School of Material Science and EngineeringUniversity of JinanJinanPeople’s Republic of China
  2. 2.School of Chemistry and Chemical EngineeringUniversity of JinanJinanPeople’s Republic of China

Personalised recommendations