Abstract
The emission decay curves from ( [tetramethylammonium manganese chloride (TMMC)] crystals doped with small amounts of deviate dramatically from simple exponential form. Consistent with the linear chain structure of TMMC, the curves are adequately described by decay expressions derived for exciton trapping in one-dimensional systems. Analysis of the data indicates that exciton migration in TMMC is nearly one-dimensional with an intrachain hopping frequency at room temperature of to and an interchain hopping frequency of only to . The presence of small concentrations of , a scattering impurity, greatly reduces the rate of exciton trapping. The temperature dependence of the decay curves suggests an energy barrier of 800 to 1000 for migration along the chains in TMMC.
- Received 1 November 1985
DOI:https://doi.org/10.1103/PhysRevB.33.6815
©1986 American Physical Society