Ye Mao, Searson Peter C
Department of Materials Science and Engineering, and Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA.
Department of Materials Science and Engineering, and Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA ; Institute for Nanobiotechnology (INBT), Johns Hopkins University, Baltimore, Maryland 21218, USA.
Phys Rev B Condens Matter Mater Phys. 2011 Sep 16;84:125317. doi: 10.1103/PhysRevB.84.125317.
Quantum dot (QD) blinking is characterized by switching between an "on" state and an "off" state, and a power-law distribution of on and off times with exponents from 1.0 to 2.0. The origin of blinking behavior in QDs, however, has remained a mystery. Here we describe an energy-band model for QDs that captures the full range of blinking behavior reported in the literature and provides new insight into features such as the gray state, the power-law distribution of on and off times, and the power-law exponents.
量子点(QD)闪烁的特征是在“开”状态和“关”状态之间切换,以及开和关时间的幂律分布,指数范围为1.0至2.0。然而,量子点闪烁行为的起源仍然是个谜。在这里,我们描述了一种量子点的能带模型,该模型涵盖了文献中报道的全部闪烁行为范围,并为诸如灰色状态、开和关时间的幂律分布以及幂律指数等特征提供了新的见解。