Monday, 19 June 2006 - 4:40 PM Eng Ctr 245 (University of Colorado at Boulder) 126
Photoluminescence Properties of Colloidal PbS Quantum Dots
Guangcun SHAN, Fudan University and Ohio University, Shanghai, China and Shuying BAO, Fudan University, Shanghai, China.
Quantum dots (QDs) of narrow-gap semiconductors such as PbS are nice candidates for investigating strong quantum confinement effects because of very large exciton Bohr radii. Furthermore, it is possible to control drastically the photoluminescence(PL) properties under appropriate conditions. In the present study, we have investigated systematically the PL properties of colloidal PbS QDs by measuring the temperature dependence of PL spectra and time-resolved PL spectra.