Quantum Dots and Their Multimodal Applications: A Review

Materials

Debasis Bera¹  Lei Qian²  Teng-Kuan Tseng² 

[1] Department of Materials Science and Engineering, University of Florida, Gainesville, FL, USA;

关键词: quantum dots;    semiconducting nanomaterials;    electroluminescence;    photoluminescence;    solar cells;    biological imaging;   

DOI  :  10.3390/ma3042260

来源: mdpi

【 摘 要 】

Semiconducting quantum dots, whose particle sizes are in the nanometer range, have very unusual properties. The quantum dots have band gaps that depend in a complicated fashion upon a number of factors, described in the article. Processing-structure-properties-performance relationships are reviewed for compound semiconducting quantum dots. Various methods for synthesizing these quantum dots are discussed, as well as their resulting properties. Quantum states and confinement of their excitons may shift their optical absorption and emission energies. Such effects are important for tuning their luminescence stimulated by photons (photoluminescence) or electric field (electroluminescence). In this article, decoupling of quantum effects on excitation and emission are described, along with the use of quantum dots as sensitizers in phosphors. In addition, we reviewed the multimodal applications of quantum dots, including in electroluminescence device, solar cell and biological imaging.

【 授权许可】

CC BY   
© 2010 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.