CAJ | 학술논문

采用低温水热技术,以硫脲为稳定剂,在90℃的水相中合成了发蓝色荧光的Mn^2＋和Ce^3＋共掺杂的CdS体量子点。用透射电子显微镜对该量子点形貌进行了表征,其直径约为10 nm的球形颗粒。研究了该量子点的紫外-可见吸收光谱、荧光发射光谱以及荧光光谱随时间的变化。结果表明,Mn^2＋和Ce^3＋共掺杂使CdS量子点的发光强度提高10倍;该量子点具有较好的发光稳定性。
채용저온수열기술,이류뇨위은정제,재90℃적수상중합성료발람색형광적Mn^2＋화Ce^3＋공참잡적CdS체양자점。용투사전자현미경대해양자점형모진행료표정,기직경약위10 nm적구형과립。연구료해양자점적자외-가견흡수광보、형광발사광보이급형광광보수시간적변화。결과표명,Mn^2＋화Ce^3＋공참잡사CdS양자점적발광강도제고10배;해양자점구유교호적발광은정성。
Ce^3＋ and Cd^2＋ co-doped CdS quantum dots（QDs） were synthesized in an aqueous solution at 90℃ using thiourea as a stabilizer.The as-prepared samples were characterized by transmission electron microscope.The prepared product was proved to be sphericity QDs and the diameter of about 10 nm.The as-prepared undoped and the Ce3＋ and Mn2＋ co-doped CdS QDs were characterized by UV-Vis spectrum and fluorescence spectrum.Results show that the co-doped CdS QDs have a better fluoresence intensity and stability than undoped CdS QDs.