Cathodoluminescence and photoluminescence from Tb3+ in GaN powders and thin films

Joseph Laski, Jonathan H. Tao, Kailash Mishra, David Hamby, Madis Raukas, Keith Klinedinst, Joanna McKittrick, Jan B. Talbot, Nestor Perea Lopez, Gustavo Hirata

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

We report luminescence from intra-configurational f-f transitions of Tb3+ in GaN powders and thin films deposited on sapphire substrates using metal organic vapor phase epitaxy (MOVPE) and pulsed laser deposition (PLD). The MOVPE film was grown using the precursor tris(2,2,6,6-tetramethyl-3, 5-heptanedionato)terbium, while the PLD films were prepared from powder samples of GaN:Tb3+ prepared by a solution approach. All films yielded transitions of Tb3+ originating from the 5D4 state of Tb3+ to the 7F5 level as well as near bandgap emission (NBE) under cathodoluminescence (CL) excitation. The same transitions were also observed in the source powder of the PLD films, with the exceptions of the NBE at 370 nm. This indicates that the films contain lower defect level than the powders, which improves the quality of the material.

Original languageEnglish (US)
Title of host publicationECS Transactions - Physics and Chemistry of Luminescent Materials, Including the 4th Symposium on Persistent Phosphors
Pages123-134
Number of pages12
Edition31
StatePublished - Nov 25 2009
EventPhysics and Chemistry of Luminescent Materials, Including the 4th Symposium on Persistent Phosphors - 214th ECS Meeting - Honolulu, HI, United States
Duration: Oct 12 2008Oct 17 2008

Publication series

NameECS Transactions
Number31
Volume16
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

OtherPhysics and Chemistry of Luminescent Materials, Including the 4th Symposium on Persistent Phosphors - 214th ECS Meeting
CountryUnited States
CityHonolulu, HI
Period10/12/0810/17/08

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Laski, J., Tao, J. H., Mishra, K., Hamby, D., Raukas, M., Klinedinst, K., McKittrick, J., Talbot, J. B., Perea Lopez, N., & Hirata, G. (2009). Cathodoluminescence and photoluminescence from Tb3+ in GaN powders and thin films. In ECS Transactions - Physics and Chemistry of Luminescent Materials, Including the 4th Symposium on Persistent Phosphors (31 ed., pp. 123-134). (ECS Transactions; Vol. 16, No. 31).