@inproceedings{cc89ee1d75d34d82af0fcead3d9f193b,
title = "Carrier dynamics and photoexcited emission efficiency of ZnO:Zn phosphor powders",
abstract = "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 particl{\'e}s surface) versus two-photon excitation (uniform excitation throughout the particl{\'e}s 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.",
keywords = "Nanostructure, Phosphor, Photoluminescence, Powder, Quantum efficiency, Zinc oxide, ZnO",
author = "Foreman, \{John V.\} and Everitt, \{Henry O.\} and Jianqiu Yang and Jie Liu",
year = "2009",
doi = "10.1117/12.811561",
language = "English",
isbn = "9780819474605",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIII",
}