研究目的
Studying the effect the concentration of double-shell CdSe/CdS/ZnS semiconductor colloidal quantum dots has on the measured parameters of the absorption and luminescence spectra of solutions of these quantum dots in toluene.
研究成果
The concentration of QDs in solution affects the position and width of the luminescence spectrum, with the exciton energy varying from 2.065 to 2.1 eV in the 0.06 to 32 μg/μL range. Nonradiative energy transfer between QDs is a possible mechanism for the concentration-dependent shift of the luminescence spectrum.
研究不足
The study is limited to the effect of concentration on spectral-luminescent properties at room temperature. The effect of temperature and exciting laser radiation intensity requires separate study.
1：Experimental Design and Method Selection:
Optical spectroscopy was used to study the effect of quantum dot concentration on absorption and luminescence spectra.
2：Sample Selection and Data Sources:
Solutions of CdSe/CdS/ZnS QDs in toluene with varying concentrations were prepared.
3：List of Experimental Equipment and Materials:
SF-2000 spectrophotometer for absorption spectra, SDL-1 high-aperture spectrometer for luminescence spectra, CR-599 tunable dye laser for excitation.
4：Experimental Procedures and Operational Workflow:
Concentration of QDs was varied by adding toluene, absorption and luminescence spectra were measured at room temperature.
5：Data Analysis Methods:
Linear approximation of optical density dependence on concentration, analysis of luminescence spectrum characteristics.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
