Synthesis and Characterization of Lead-based Core-shell-shell Quantum Dots and Studies on Excitation-dependent Quantum Yield Measurement

Download or read book Synthesis and Characterization of Lead-based Core-shell-shell Quantum Dots and Studies on Excitation-dependent Quantum Yield Measurement written by Jieming Cao and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Nano-sized semiconductors, known as quantum dots (QDs), are one of the hottest research areas in recent years. The energy gaps of QDs change with their diameters, giving them size-dependent optical properties. By controlling reaction conditions, people are able to make QDs that can emit in certain wavelength ranges. So far, QDs have shown great potential in telecommunication, bio-imaging, single-photon laser source, etc. This thesis starts with Chapter 1, which first introduces the finding of QDs and why they have such special properties. The quantum confinement and energy gap are discussed, followed by the absorption and emission of QDs. Moreover, the synthesis methods and mechanism involved are reviewed in brief.