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	共沉淀法合成Sm~(3+)掺杂的Sr_2CeO_4的荧光光谱
	石士考 ; 栗俊敏 ; 周济 ; SHI Shi-kao ; LI Jun-min ; ZHOU Ji
	2010-06-10 ; 2010-06-10
关键词	共沉淀法 Sr2CeO4 Sm3+ 荧光光谱 Co-precipitation process Sr_2CeO_4 Sm~(3+) Luminescence spectra O482.3
其他题名	Luminescence Spectra of Sm~(3+) Doped Sr_2CeO_4 Synthesized through Co-Precipitation Process
中文摘要	以(NH4)2C2O4为沉淀剂,用Sr,Ce和Sm的硝酸盐为反应物,制备了Sr2CeO4:Sm的前驱体。将此前驱体烧结后,得到了Sm掺杂的Sr2CeO4白色荧光材料。其荧光光谱强度与烧结温度和Sm3+的掺杂浓度密切相关,当烧结温度为1 050℃以及Sm3+的掺杂浓度为1 mol%时,峰值为470 nm的宽带以及Sm3+在608和654 nm的线谱发射最强。同直接在高温固相反应下得到的样品进行比较,其发射光谱强度大大提高。; The precursor powders of Sm~(3+) doped Sr_2CeO_4 were obtained by the application of(NH_4)_2C_2O_4 as a precipitant.After(calcinations,) the precursor powders became a white emitting fluorescent material.The XRD and emission spectra manifest that the(optimum) temperature and Sm~(3+) concentration for synthesizing Sr_2CeO_4:Sm are 1 050 ℃ and 1 mol%,respectively.The better the phosphor powders crystallize,the higher their emission intensities are.The excitation spectrum implies that the transition emissions of Sm~(3+) at 608 and 654 nm originate from the Ce~(4+)-O~(2-) charge transfer(MLCT) resulting from the interaction of Ce~(4+) and(the)(neighboring) O~(2-).Therefore,it can be concluded that the host Sr_2CeO_4 acts as a sensitizer,which transfers the energy to Sm~(3+).The emission intensity of the phosphor synthesized through co-precipitation is much higher than that of phosphor prepared using conventional solid state reactions.; 国家自然科学基金(50472020); 河北师范大学重点科研基金(L2003Z04); 清华大学基础科研基金(JZ2001008)资助
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/61287]
专题	清华大学
推荐引用方式 GB/T 7714	石士考,栗俊敏,周济,等. 共沉淀法合成Sm~(3+)掺杂的Sr_2CeO_4的荧光光谱[J],2010, 2010.
APA	石士考,栗俊敏,周济,SHI Shi-kao,LI Jun-min,&ZHOU Ji.(2010).共沉淀法合成Sm~(3+)掺杂的Sr_2CeO_4的荧光光谱..
MLA	石士考,et al."共沉淀法合成Sm~(3+)掺杂的Sr_2CeO_4的荧光光谱".(2010).

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