High Pressure luminescence (Modern aspects of physical chemistry at high pressure : the 50th commemorative volume)

Abstract

In this review we discuss high pressure luminescence in liquids and polymer films to 10-12 kbar pressure, as well as studies in polymer films and crystalline solids to over 100 kbar. We use these results to characterize excitations and to test theories concerning radiative and non-radiative processes. The organic systems discussed include: (a) several polyenes where a theory relating the effective Stokes shift to the radiative rate is tested; (b) several dyes in liquid solution where a theory relating viscosity to luminescence efficiency is tested; (c) polymer films involving polyvinylcarbazole, where the two excimer states are characterized. The inorganic systems include: (a) ZnS with appropriate dopants, where a theory of the luminescence efficiency is tested; (b) Europium doped oxysulfides where a model describing emission from the various excited states is tested.