研究目的
Investigating the enhancement of quantum yield and stability of ultrasmall CdSe quantum dots through post-synthesis ligand treatment with citric acid for white-light emitting applications.
研究成果
The post-synthetic ligand treatment of ultrasmall CdSe QDs with citric acid significantly improves the quantum yield and stability, making them viable for white-light emitting applications. The treatment recovers band edge emission and shifts the CIE coordinates to a cooler white, offering potential for use in LEDs and other optoelectronic devices.
研究不足
The study focuses on the enhancement of quantum yield and stability through citric acid treatment but does not explore the long-term stability under various environmental conditions or the scalability of the synthesis and treatment process for industrial applications.
1：Experimental Design and Method Selection:
The study involved a post-synthesis ligand treatment of ultrasmall CdSe quantum dots with citric acid to enhance their quantum yield and stability. The methodology included synthesis modifications, purification by gel permeation chromatography, and characterization techniques.
2：Sample Selection and Data Sources:
Ultrasmall CdSe QDs were synthesized and treated with citric acid. The samples were characterized using absorption and emission spectra, TEM, STEM, IR spectra, and NMR spectra.
3：List of Experimental Equipment and Materials:
Equipment included a Cary 60 UV-visible spectrometer, an ISS PC1 photon counting fluorimeter, a FEI Tecnai Osiris 200 kV transmission electron microscope, and a Nicolet iS5 FTIR. Materials included TOPO, HDA, TBP, CdO, Se shot, and citric acid.
4：Experimental Procedures and Operational Workflow:
The CdSe QDs were synthesized, purified, and then treated with citric acid. The optical properties and stability of the treated QDs were analyzed over time.
5：Data Analysis Methods:
The quantum yield was measured using Coumarin 152A in ethanol as a standard. The emission and absorption spectra were analyzed to understand the changes in optical properties.
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-
Cary 60 UV-visible spectrometer
Cary 60
Agilent
Used for obtaining absorption spectra of the quantum dots.
Cary 60 UV-Vis Spectrophotometer
立即获取同款设备 -
FEI Tecnai Osiris 200 kV transmission electron microscope
Tecnai Osiris
FEI
Used for high-resolution TEM and STEM imaging of the quantum dots.
暂无现货
预约到货通知
-
Nicolet iS5 FTIR
iS5
Thermo Scientific
Used for obtaining infrared spectra of the quantum dots.
暂无现货
预约到货通知
-
Bruker AV-400
AV-400
Bruker
Used for obtaining 1H NMR spectra of the quantum dots.
暂无现货
预约到货通知
-
ISS PC1 photon counting fluorimeter
PC1
ISS
Used for obtaining emission spectra of the quantum dots.
暂无现货
预约到货通知
-
登录查看剩余3件设备及参数对照表
查看全部
