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Carrier dynamics and photoexcited emission efficiency of ZnO:Zn phosphor powders

Publication ,  Journal Article
Foreman, JV; Everitt, HO; Yang, J; Liu, J
Published in: Proceedings of SPIE - The International Society for Optical Engineering
June 15, 2009

Nonstoichiometric ZnO with an excess of Zn atoms (ZnO:Zn) has a long history of use as a green/monochrome phosphor in electron-excited vacuum fluorescent and field emission displays. The advent of ultraviolet lasers and light emitting diodes presents the possibility of photoexciting the highly efficient, defect-related green emission in ZnO:Zn. Here we study experimentally the time-integrated quantum efficiency and the time-resolved photoluminescence decays of both near band edge and defect emissions in unannealed (ZnO) and annealed (ZnO:Zn) nanoparticles under femtosecond excitation. A comparison of results using one-photon excitation (excitation primarily near the particlés surface) versus two-photon excitation (uniform excitation throughout the particlés volume) elucidates how the quantum efficiencies depend on material properties, such as the spatial distributions of radiative and nonradiative defects, and on optical effects, such as reabsorption. © 2009 SPIE.

Duke Scholars

Published In

Proceedings of SPIE - The International Society for Optical Engineering

DOI

ISSN

0277-786X

Publication Date

June 15, 2009

Volume

7214

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 4009 Electronics, sensors and digital hardware
  • 4006 Communications engineering
 

Citation

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Foreman, J. V., Everitt, H. O., Yang, J., & Liu, J. (2009). Carrier dynamics and photoexcited emission efficiency of ZnO:Zn phosphor powders. Proceedings of SPIE - The International Society for Optical Engineering, 7214. https://doi.org/10.1117/12.811561
Foreman, J. V., H. O. Everitt, J. Yang, and J. Liu. “Carrier dynamics and photoexcited emission efficiency of ZnO:Zn phosphor powders.” Proceedings of SPIE - The International Society for Optical Engineering 7214 (June 15, 2009). https://doi.org/10.1117/12.811561.
Foreman JV, Everitt HO, Yang J, Liu J. Carrier dynamics and photoexcited emission efficiency of ZnO:Zn phosphor powders. Proceedings of SPIE - The International Society for Optical Engineering. 2009 Jun 15;7214.
Foreman, J. V., et al. “Carrier dynamics and photoexcited emission efficiency of ZnO:Zn phosphor powders.” Proceedings of SPIE - The International Society for Optical Engineering, vol. 7214, June 2009. Scopus, doi:10.1117/12.811561.
Foreman JV, Everitt HO, Yang J, Liu J. Carrier dynamics and photoexcited emission efficiency of ZnO:Zn phosphor powders. Proceedings of SPIE - The International Society for Optical Engineering. 2009 Jun 15;7214.

Published In

Proceedings of SPIE - The International Society for Optical Engineering

DOI

ISSN

0277-786X

Publication Date

June 15, 2009

Volume

7214

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 4009 Electronics, sensors and digital hardware
  • 4006 Communications engineering