Molecular and polymer precursor routes to manganese-doped zinc orthosilicate phosphors

Journal Article · Wed Apr 10 04:00:00 EDT 1996 · Journal of the American Chemical Society

DOI:https://doi.org/10.1021/ja9537639· OSTI ID:263144

Su, K; Tilley, T D ^[1]; Sailor, M J ^[2]

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1. Univ. of California, Berkeley, CA (United States)
2. Univ. of California, San Diego, CA (United States)

The zinc alkoxy (siloxy)complex [C@Zn[OSi(O{sup t}Bu){sub 3}]{sub 2}]C{sub 2} has been prepared and studied as a molecular precursor to zinc orthosilicate, Zn{sub 2}SiO{sub 4}. This complex, prepared by reaction of ZnMe{sub 2} with HOSi(O{sup t}Bu){sub 3}, has been characterized by X-ray crystallography as a dimer with two four-coordinate zinc centers. This polymer undergoes a very clean ceramic conversion over 150-250{degree}C to give the theoretical yield of carbon-free Zn{sub 2}SiO{sub 4}.SiO{sub 2}. The pyrolytic elimination products consists of water, tert-butyl alcohol, and isobutene. X-ray diffraction studies on the ceramic products show that Zn{sub 2}SiO{sub 4} is the only zinc-containing, crystalline product formed. Thus this precursor approach appears to offer an advantage over sol-gel processes, which tend to produce ZnO as a side product. Hydrocarbon solutions of the polymer were used to fabricate high-quality thin films. Via pyrolysis of [ZnOSi(O{sup t}Bu){sub 2}O]{sub n}/[Mn(CH{sub 2}SiMe{sub 3}){sub 2}]{sub m} mixtures, manganese-doped Zn{sub 2}SiO{sub 4}.SiO{sub 2} materials were synthesized. These materials exhibit two photoluminescence emission bands centered at 535 (major) and 605 nm (minor). The intensity of the green emission at 535 nm, which is responsible for the cathodoluminescence properties of Zn{sub 2}SiO{sub 4}:Mn phosphors, is highly dependent on the level of manganese doping. 26 refs., 12 figs., 4 tabs.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 263144
• Journal Information: Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 14 Vol. 118; ISSN JACSAT; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
CHEMICAL PREPARATION
CRYSTALLOGRAPHY
DOPED MATERIALS
EMISSION SPECTRA
MANGANESE
PHOSPHORS
PHOTOLUMINESCENCE
POLYMERS
PYROLYSIS
SYNTHESIS
THERMAL GRAVIMETRIC ANALYSIS
THIN FILMS
X-RAY DIFFRACTION
ZINC COMPLEXES
ZINC SILICATES