Are super-exponential luminescence decays possible?

作者：Palmeira Tiago; Berberan Santos Mario N^*

来源：Chemical Physics, 2014, 445: 14-20.

DOI：10.1016/j.chemphys.2014.10.011

• Luminescence decay
• Stretched exponential
• Relaxation kinetics
• Fluorescence
• Phosphorescence
• Triplet-triplet absorption

Luminescence decay functions describe the time dependence of radiation emitted by a sample after excitation. An overview of the mathematical aspects and systematics of luminescence decays is presented. In particular, super-exponential (faster-than-exponential) decays are defined and the possibility of their observation in single species physicochemical systems discussed. It is shown that this type of behavior can be both spontaneous and induced (by acting upon the system in real time). Spontaneous super-exponentiality is identified for the first time in experimental decays, these being phosphorescence decays affected by triplet-triplet absorption.

• 出版日期2014-12-5