摘要
The intense blue emitting phosphors Sr2MgSiO5∶Ce 3+ 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 Ce 3+ 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 7/2 of Ce 3+ 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 Ce 3+ 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 Ce 3+ 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.
The intense blue emitting phosphors Sr2MgSiO5： Ce^3＋ 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→^2 F5/2 （4f） and 5d→^2 F7/2 （4f） of Ce^3＋ 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： ^2 F5/2 and ^2 F7/2 of Ce^3＋ 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 Ce^3＋ 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 Ce^3＋ 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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第10期1827-1829,共3页
Chemical Journal of Chinese Universities
基金
河北省科学技术发展基金(批准号:51215103b)资助.
