3-Mercaptopropionic, 4-Mercaptobenzoic, and Oleic Acid-Capped CdSe Quantum Dots: Interparticle Distance, Anchoring Groups, and Surface Passivation
作者： José Augusto Lucena dos Santos , Fabio Baum , Emerson Cristofer Kohlrausch , Fabiele C Tavares , Tatiane Pretto
DOI: 10.1155/2019/2796746
关键词:
摘要: The optoelectronic properties of quantum dots are strongly controlled by the chemical nature their surface-passivating ligands. In this work, we present synthesis, characterization, and surface modification CdSe (QDs) application in solar cells. QDs were capped oleic acid (OA), 3-mercaptopropionic (MPA), 4-mercaptobenzoic (MBA). characterized transmission electron microscopy (TEM), UV-Vis absorption emission spectrophotometry, thermogravimetric analyses, 1H 13C NMR. From TEM analysis, it has been observed that interparticle distance can be effectively presence different molecular size NMR, specific types interactions between Cd2+ ligands have observed. Although CdSe/OA presented larger as compared to CdSe/MPA CdSe/MBA, photocatalytic oxidation thiol groups on MPA- MBA-based resulted poor stabilization, ultimately resulting power conversion efficiencies which ca. 70% smaller than OA-based cell.
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