研究目的
Investigating the formation mechanism of three-dimensional PbSe quantum dot superlattices and their electronic properties.
研究成果
The study establishes the formation mechanism of three-dimensional QD epi-SLs and highlights the importance of surface chemistry in charge transport. It suggests that careful control of surface chemistry is essential for reducing energy disorder and enabling miniband formation in these materials.
研究不足
The study is limited by the understanding of surface chemistry's role in charge transport and the need for further optimization of spatial order and electrical properties.
1：Experimental Design and Method Selection:
The study uses X-ray scattering and correlative electron imaging and diffraction to determine the formation mechanism of three-dimensional PbSe QD epi-SL films.
2：Sample Selection and Data Sources:
Oleate-capped colloidal PbSe QDs with a diameter of 6.5 ± 0.3 nm were used.
3：5 ± 3 nm were used. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Materials include PbO, PbI2, Se shot, oleic acid, diphenylphosphine, 1-octadecene, ethylene glycol, acetonitrile, hexanes, toluene, ethanol, tetrachloroethylene, 3-mercaptopropyltrimethoxysilane, carbon tetrachloride, ferrocene, trimethylaluminium, ammonium thiocyanate, 1,2-ethanedithiol, dimethyl sulfoxide, 1,2-ethylenediamine, and deuterated solvents.
4：Experimental Procedures and Operational Workflow:
The fabrication process involved self-assembly of QD films on liquid ethylene glycol, ligand exchange with EDA, stamp transfer to a substrate, PbI2 treatment, and ALD infilling with alumina.
5：Data Analysis Methods:
Data were analyzed using GISAXS, SEM, TEM, SAED, FTIR, XPS, ICP-MS, and electrical measurements.
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Perkin-Elmer Lambda 950 spectrophotometer
Lambda 950
Perkin-Elmer
Optical absorbance measurements
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FEI Magellan 400L XHR SEM
Magellan 400L XHR
FEI
SEM imaging
