Influence of donor-donor transport on excitation energy transfer in binary system C102-C6 doped in Poly (methylmethacrylate)

Energy transfer and migration from Coumarin102 to Coumarin6 in Poly (methylmethacrylate) have been investigated using steady-state and time domain fluorescence spectroscopy. It is found that the influence of energy migration in energy transfer can be described quite convincingly on the basis of theories of Loring, Anderson and Fayer (LAF) and Huber. At higher acceptor concentrations direct donor-acceptor transfer occurs through Förster mechanism. It is suggested to use a mixture of these two dyes in the LSCs.