I'm looking for any scientific work showing long distance diffusion (> 50 nm) length of singlet excitons in organic electronic materials like: conjugated polymers or crystalized organic small molecules.
The paper titled: Dependence of Exciton Diffusion Length on Crystalline Order in Conjugated Polymers could be useful to you. It investigates the effect of the crysatllinty of the polymer on the exciton diffusion length.
You can follow the link for details:http://pubs.acs.org/doi/abs/10.1021/jp409776s?journalCode=jpccck