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Influence of Charge Compensation on the Spectra Characteristics of Sr_2SiO_4∶Eu~(3+) Phosphor

Yang Zhiping

Abstract

The Sr2SiO4∶Eu3+ phosphor was synthesized by sol-gel method.The excitation and emission spectra were investigated.The emission spectrum of Sr2SiO4∶Eu3+ shows several bands,and the main peak value is 618 nm.The excitation spectrum for 618 nm emission has several excitation bands at 320 nm,397 nm,464 nm and 518 nm.The effect of charge compensation Li+,Na+,and K+ concentration on the emission spectrum intensity of Sr2SiO4∶Eu3+ was studied.The results show that the emission spectrum intensity firstly increases with the increasing charge compensation concentration,then decreases.But the charge compensation concentration corresponding to the maximum emission intensity is different with different charge compensation,and the concentration is 8 mol%,7.5 mol% and 7 mol% corresponding to Li+,Na+ and K+,respectively.

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Key concepts: Phosphor, Excitation, Emission intensity, Emission spectrum, Analytical Chemistry (journal), Materials science, Spectral line, Intensity (physics)