Correlation between photoluminescence and oxygen vacancies in ZnO phosphors

Journal Article · Mon Jan 01 04:00:00 EST 1996 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.116699· OSTI ID:277176

Vanheusden, K; Seager, C H; Warren, W L; Tallant, D R; Voigt, J A ^[1]

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1. Sandia National Laboratories, Albuquerque, New Mexico 87185-1349 (United States)

By combining electron paramagnetic resonance (EPR), optical absorption, and photoluminescence (PL) spectroscopy, a strong correlation is observed between the green 510 nm emission, the free-carrier concentration, and the density of singly ionized oxygen vacancies in commercial ZnO phosphor powders. From these results, we demonstrate that free-carrier depletion at the particle surface, and its effect on the ionization state of the oxygen vacancy, can strongly impact the green emission intensity. The relevance of these observations with respect to low-voltage field emission displays is discussed. {copyright} {ital 1996 American Institute of Physics.}

• Research Organization: Sandia National Laboratory
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 277176
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 3 Vol. 68; ISSN 0003-6951; ISSN APPLAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTRA
CRYSTAL DEFECTS
DEFECT STATES
ELECTRON SPIN RESONANCE
PHOSPHORS
PHOTOLUMINESCENCE
VACANCIES
VISIBLE SPECTRA
ZINC OXIDES