Variable range cluster model of exciton migration: Dimensionality and critical exponents for naphthalene

Abstract

Relative luminescence intensities for randomly substituted ternary systems with two major components and a minor one (sensor), for four triplet and one singlet exciton systems, identify the maximal effective exciton interaction distance for each system. The critical exponents [beta] and [gamma] show an effective 2-dimensional exciton topology and are consistent with dynamic exciton percolation.