Luminescent Properties of Ce3+-Doped Sr2MgSiO5 Blue-emitting Phosphor

Abstract

Abstract: The intense blue emitting phosphors Sr₂MgSiO₅∶Ce³⁺ were synthesized by high temperature solid state reaction method, and their luminescence properties were studied. The intense blue-emission band present a peak fixed at 420 nm, which consists of two peaks located at 408 and 445 nm, respectively. The two peaks are originated from the transition 5d→²F_5/2(4f) and 5d→²F_7/2(4f) of Ce³⁺ ions. The energy level difference value of the two emission bands is 2 038 cm^-1, which is consistent with the theoretic value(2 000 cm^-1) between the ground state: ²F_5/2 and ²F_7/2of Ce³⁺ ions. The excitation spectra extend from 250 to 400 nm and the peak positions around 365 nm. In addition, the effect of the concentration of Ce³⁺ ions and the role of charge compensation of different ions to the emission intense were investigated, the experiment results suggest that when the proportion of Ce³⁺ ions to Sr₂MgSiO₅ were 0.03(molar ratio), the strongest emission was obtained. Li⁺, Na⁺, K⁺ and Cl^- ions can all enhance the intensity of the emissions; especially Cl^- ions gave the best improvement.

Key words: Luminescent property, Phosphor , Sr₂MgSiO₅∶Ce³⁺

CLC Number:

O614
O482.31

TrendMD:

YANG Zhi-Ping, LIU Yu-Feng, XIONG Zhi-Jun. Luminescent Properties of Ce³⁺-Doped Sr₂MgSiO₅ Blue-emitting Phosphor[J]. Chem. J. Chinese Universities, doi: .

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Luminescent Properties of Ce³⁺-Doped Sr₂MgSiO₅ Blue-emitting Phosphor

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