Efficient Exciton Concentrators Built from Colloidal Core/Crown CdSe/CdS Semiconductor Nanoplatelets

• Published in: Nano letters Vol. 14; no. 1; pp. 207 - 213
• Main Authors: Tessier, Mickaël D, Spinicelli, Piernicola, Dupont, Dorian, Patriarche, Gilles, Ithurria, Sandrine, Dubertret, Benoit
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 08.01.2014
• Subjects: Applied sciences; Cadmium selenides; Cadmium sulfides; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Electron states; Electronics; Exact sciences and technology; Excitons and related phenomena; Heterostructures; Intermetallics; Materials science; Molecular electronics, nanoelectronics; Nanoscale materials and structures: fabrication and characterization; Nanostructure; Optical properties; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures; Physics; Quantum dots; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Semiconductors; Nanoplatelets; 2D geometry; fluorescence; heterostructure; quantum wells; nanosheets; Nanoplate; Excitons; Semiconductor materials; Quantum dots; Optical properties; Monolayers; Nanostructured materials; Heterostructures
• ISSN: 1530-6984; 1530-6992
• DOI: 10.1021/nl403746p

We present the synthesis and the optical properties of a new type of two-dimensional heterostructure: core/crown CdSe/CdS nanoplatelets. They consist of CdSe nanoplatelets that are extended laterally with CdS. Both the CdSe core and the CdS crown dimensions can be controlled. Their thickness is controlled at the monolayer level. These novel nanoplatelet-based heterostructures have spectroscopic properties that can be similar to nanoplatelets or closer to quantum dots, depending on the CdSe core lateral size.