Comparative study on the synthesis, photoluminescence and application in InGaN-based light-emitting diodes of TAG:Ce{sup 3+} phosphors

Journal Article · Sun Apr 15 00:00:00 EDT 2007 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2007.01.011· OSTI ID:21015760

Yibo, Chen ^[1]; Jing, Wang ^[1]; Qiang, Su ^[1]

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1. State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275 (China)

Cerium-doped terbium aluminum garnet phosphors, Tb{sub 3}Al{sub 5}O{sub 12}:Ce{sup 3+} (TAG:Ce{sup 3+}), were prepared with different methods: co-precipitation (CP), half dry-half wet (HDHW), sol-combustion (SC) and Pechini method plus conventional solid state reaction (SS) method. Comparative study on the phase-formation, particle size, morphologies and luminescent characteristics of the phosphors synthesized with different methods was carried out by means of XRD, FE-SEM and photoluminescence (PL) analysis and SC method was confirmed by the comparison of the results to be an easy and an effective process for preparing efficient and nano-sized Tb{sub 3}Al{sub 5}O{sub 12}:Ce{sup 3+} phosphors. Various factors influencing particle size, morphology and PL of the phosphors, such as precursor preparation, reaction temperature and heating time, were also investigated. Light-emitting diodes (LEDs) were fabricated with each phosphor and a {approx}460 nm emitting InGaN chip. The LEDs from SS, HDHW and CP exhibit strong white emission while those from SC and Pechini emit yellow, revealing that the emission characteristics of LEDs are influenced not only by the morphology and the particle size of the phosphors, but also by the preparing process of the phosphors. - Graphical abstract: Emission spectra of the LEDs with TAG:0.03Ce{sup 3+} phosphors synthesized by different methods (SS (a); CP (b); HDHW (c); SC (d); Pechini (e)) under 20 mA forward bias.

• OSTI ID: 21015760
• Journal Information: Journal of Solid State Chemistry, Vol. 180, Issue 4; Other Information: DOI: 10.1016/j.jssc.2007.01.011; PII: S0022-4596(07)00030-8; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALUMINIUM COMPOUNDS
CERIUM COMPOUNDS
CERIUM IONS
COMBUSTION
COPRECIPITATION
DOPED MATERIALS
EMISSION SPECTRA
LIGHT EMITTING DIODES
MORPHOLOGY
NANOSTRUCTURES
OXIDES
PARTICLE SIZE
PHOSPHORS
PHOTOLUMINESCENCE
SCANNING ELECTRON MICROSCOPY
SYNTHESIS
TERBIUM COMPOUNDS
X-RAY DIFFRACTION