研究目的
To study the low-temperature dynamics in layered ensembles of core-double-shell colloidal CdSe/CdS/ZnS quantum dots using a combination of experimental techniques to clarify the nature and hierarchy of relaxation processes.
研究成果
The study successfully characterized the low-temperature dynamics and relaxation processes in CdSe/CdS/ZnS quantum dots using a combination of experimental techniques. It identified the contributions to optical spectra broadening and determined key parameters of electron-phonon coupling. The findings highlight the potential of combined experimental approaches in studying semiconductor quantum dots.
研究不足
The study is limited by the broad size distribution of quantum dots, which leads to inhomogeneous broadening of spectra. Additionally, the ultrafast decay curves in photon echo measurements require more complex dynamical theories for accurate description.
1：Experimental Design and Method Selection:
The study utilized a combination of photoluminescence and absorption spectroscopy, luminescence microscopy, photon echo, transmission electronic microscopy, and Raman scattering to investigate the properties of quantum dots.
2：Sample Selection and Data Sources:
Core-double-shell colloidal CdSe/CdS/ZnS quantum dots coated by Si-organic ligands for better solubility in neutral solvents (toluene) were used.
3：List of Experimental Equipment and Materials:
Equipment included a JEM-2010 TEM device, Specord M400 spectrophotometer, Nikon Diaphot optical microscope, femto-picosecond laser TeMa-150, avalanche photodiode EGG SPCM-PQ-200, and a triple-grating TriVista 777 spectrometer.
4：Experimental Procedures and Operational Workflow:
Samples were prepared using a blade-coating technique, characterized by TEM, and studied using the aforementioned techniques across a range of temperatures.
5：Data Analysis Methods:
Data were analyzed using theoretical models to determine parameters like exciton energy, Huang–Rhys factor, and average energy of local optical phonons.
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-
JEM-2010
JEM-2010
JEOL
Transmission electron microscopy studies
暂无现货
预约到货通知
-
TeMa-150
TeMa-150
Avesta
Femto-picosecond laser operation in the visible and infrared ranges
立即获取同款设备
-
DPC-230
DPC-230
Becker & Hickl
Correlated photon counting
暂无现货
预约到货通知
-
LS-2131M-10-FF
LS-2131M-10-FF
LOTIS TII
Solid-state Nd:YAG pulse laser
立即获取同款设备 -
Specord M400
M400
Carl Zeiss Jena
Absorption spectra measurement
暂无现货
预约到货通知
-
Nikon Diaphot
Diaphot
Nikon
Optical microscopy combined with a confocal luminescence detection scheme
暂无现货
预约到货通知
-
EGG SPCM-PQ-200
SPCM-PQ-200
EGG
Avalanche photodiode operating in the photon counting mode
暂无现货
预约到货通知
-
SensiCam HighSpeed
HighSpeed
Cooke Corporation
High-speed CCD camera
暂无现货
预约到货通知
-
TriVista 777
777
TriVista
Triple-grating spectrometer
暂无现货
预约到货通知
-
Millenia
Millenia
Spectra Physics
532 nm solid-state laser
暂无现货
预约到货通知
-
登录查看剩余8件设备及参数对照表
查看全部
