Photobleaching of quantum dots by non-resonant light

• DOI: 10.1039/c3cp43668c
• Publication Date: 2013-01-14T14:31:32Z
• Authors: Xingbo Shi; Yang Tu; Xiaojun Liu; Edward S. Yeung; Hongwei Gai
• Keywords: Photobleaching

Core–shell quantum dots suffer from photobleaching by light at wavelengths longer than their emission wavelengths. That is, QD can be triggered photons with low energies that are insufficient to pump electrons into the conduction band. The most probable reason is pumped a surface state and then nonradiatively decayed as in conventional photobleaching.