Dependence of the photophysical properties of the exciplex in the polymer blends on the composite ratio and the excitation wavelengths

We investigate the dependence of the optical spectral properties of the exciplex in a polymer blend consisting of Poly(9,9´-dioctylfluorene-co-benzotiadiazole)(ADS133YE) and poly(9,9´-dioctylfluorene-co-bis-N,N´-(4-butylphenyl)-bis-N,N´-phenyl-l,4-phenylenediamine)(ADS232GE) on the excitation wavelengths and on the composite ratio using steady-state and transient spectroscopy. Experimental results show the most efficient exciplex´s emission at 1∶6 (ADS133YE: ADS232GE) in 380 nm.