Electroluminescence cells based on the lamellar solid hydrogen uranyl phosphate

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Journal of the Electrochemical Society; (USA)

DOI:https://doi.org/10.1149/1.2086937· OSTI ID:6384477

Ellis, A B; Hellstrom, E E ^[1]

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1. Dept. of Chemistry, Univ. of Wisconsin-Madison, Madison, WI (US)

Electroluminescence (EL) cells have been constructed with the layered, ionically conducting solid, hydrogen uranyl phosphate, HUO{sub 2}PO{sub 4} {center dot} 4H{sub 2}O (HUP), as the emissive medium. With ac excitation, both uranyl emission and molecular nitrogen plasma emission are observed, with the latter appearing to excite the former; the uranyl EL spectrum matches the photoluminescence spectrum of the solid. Similar results were obtained with fully substituted sodium (NaUP), magnesium (Mg{sub 0.5}UP), and pyridinium (pyHUP) derivatives of HUP. For all of these solids, the dependence of the EL intensity on sample thickness, ac frequency, and applied voltage has been determined. Typical operating conditions are 1.5--3.0 kV at 0.2--4 kHz. Impedance measurements permitted acquisition of dielectric constants and ionic conductivities for these solids, both of which decrease in the order HUP {gt} NaUP {gt} Mg{sub 0.5}UP {gt} pyHUP. A model describing the dependence of EL intensity on cell parameters is presented.

• OSTI ID: 6384477
• Journal Information: Journal of the Electrochemical Society; (USA), Journal Name: Journal of the Electrochemical Society; (USA) Vol. 137:7; ISSN 0013-4651; ISSN JESOA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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656002 -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
74 ATOMIC AND MOLECULAR PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTINIDE COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
AZINES
DIELECTRIC PROPERTIES
ELECTRIC CONDUCTIVITY
ELECTRIC IMPEDANCE
ELECTRICAL PROPERTIES
ELECTROLUMINESCENCE
ELEMENTS
EMISSION SPECTRA
HETEROCYCLIC COMPOUNDS
HYDROGEN
IMPEDANCE
IONIC CONDUCTIVITY
LUMINESCENCE
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PHOTOLUMINESCENCE
PHYSICAL PROPERTIES
PLASMA
PYRIDINES
PYRIDINIUM COMPOUNDS
QUATERNARY COMPOUNDS
SOLID-STATE PLASMA
SPECTRA
URANIUM COMPOUNDS
URANYL COMPOUNDS
URANYL PHOSPHATES