Luminescence of nanocrystalline Tb3Al5O12: Ce3+ phosphors synthesized by nitrate-citrate gel combustion method

Kang Min Kim, Jeong Ho Ryu, Sung Wook Mhin, Gyeong Seon Park, Kwang Bo Shim

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Ce3+-doped nanocrystalline terbium aluminum garnet (Tb 3Al5O12: Ce3+, TAG:Ce3+) phosphors were successfully synthesized in low temperature by nitrate-citrate gel combustion method using microwave irradiation as a heating source. The pure TAG phase was obtained after calcining at 800°C for 6 h. The prepared nanocrystalline phosphors showed a broad peak at 551 nm, and the maximum doping concentration of Ce3+ for the highest emission intensity was 0.8 mol % at 551 nm. The temperature dependence on photoluminescence properties of the prepared TAG: Ce3+ phosphors was investigated from 25 to 275°C, and the activation energies (ΔE) for thermal quenching was determined by Arrhenius fitting. The experimental results clearly indicate that prepared nanocryatalline TAG: Ce3+ has great potentials for a down-conversion yellow phosphor in white light emitting diodes.

Original languageEnglish
JournalJournal of the Electrochemical Society
Issue number10
StatePublished - 2008 Sep 22

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