Triplet exciton annihilation process on two dimensional lattice of naphthalene choleic acid crystals

A random walk simulation was used to determine the triplet exciton density and annihilation rate for a two dimensional lattice of naphthalene choleic acid with small amount of beta-methylnaphthalene (BMN). The results demonstrate that energy transfer efficiency (alpha) increases as density increases and the annihilation begins to become significant at triplet exciton densities higher then 10(-3)/sites. Another simulation was carried out to determine annihilation rate and unimolecular decay rate in the absence of BMN. The results indicate that the annihilation rate is equal to the unimolecular decay rate at the density of 1.2X10(-3)/sites.