原子与分子物理学报
原子與分子物理學報
원자여분자물이학보
CHINESE JOURNAL OF ATOMIC AND MOLECULAR PHYSICS
2006年
6期
1117-1122
,共6页
CdS纳米颗粒%光致发光%浓度
CdS納米顆粒%光緻髮光%濃度
CdS납미과립%광치발광%농도
Nanocrystals%CdS%photoluminescence%concentration
采用反胶束法,合成了硅土包裹的掺有不同浓度的Mn2+的CdS纳米颗粒. 高分辨电镜表明这些颗粒的直径小于5 nm. 仅仅改变Mn2+的掺杂浓度,研究了这些颗粒的光致发光谱和光致发光激发谱,结果表明: Mn2+浓度的大小对掺杂CdS纳米颗粒的发光产生了重要的影响.通过电子顺磁共振谱的测量和分析揭露了Mn2+浓度影响这些掺杂颗粒发光效率的原因.
採用反膠束法,閤成瞭硅土包裹的摻有不同濃度的Mn2+的CdS納米顆粒. 高分辨電鏡錶明這些顆粒的直徑小于5 nm. 僅僅改變Mn2+的摻雜濃度,研究瞭這些顆粒的光緻髮光譜和光緻髮光激髮譜,結果錶明: Mn2+濃度的大小對摻雜CdS納米顆粒的髮光產生瞭重要的影響.通過電子順磁共振譜的測量和分析揭露瞭Mn2+濃度影響這些摻雜顆粒髮光效率的原因.
채용반효속법,합성료규토포과적참유불동농도적Mn2+적CdS납미과립. 고분변전경표명저사과립적직경소우5 nm. 부부개변Mn2+적참잡농도,연구료저사과립적광치발광보화광치발광격발보,결과표명: Mn2+농도적대소대참잡CdS납미과립적발광산생료중요적영향.통과전자순자공진보적측량화분석게로료Mn2+농도영향저사참잡과립발광효솔적원인.
Silica-overcoated CdS nanocrystals doped with different manganese concentrations were synthesized by a reverse-micelle method. HRTEM image shows that Mn-doped CdS nanocrystals are below 5 nm in diameter. Only changing the doping concentration, we study the photoluminescence(PL) spectra and photoluminescence excitation(PLE) spectra of Mn-doped CdS nanocrystals embedded in silica matrices.The results show the important effect of Mn ions concentration in CdS nanocrystals on photoluminescence. Furthermore, analysis of electron paramagnetic resonance spectra shows that the doped Mn ions are distributed in different local sites in CdS host lattices, which may be responsible for the photoluminescence efficiency.
