Charge- and energy-transfer processes at polymer/polymer interfaces: A joint experimental and theoretical study
نویسندگان
چکیده
When an exciton approaches the interface between two conjugated polymers, either energy or charge transfer can take place. We present a detailed experimental investigation of these processes in various binary polymer systems. The results are interpreted in the context of quantum-chemical calculations that provide estimates of the relative energies of intrachain versus interchain excited states in pairs of various PPV-related chains. In particular, we show that charge-transfer occurs at the interface between MEH-PPV and a cyanosubstituted PPV derivative, whereas energy transfer takes place at the interface of PPV with the same cyanosubstituted polymer. @S0163-1829~99!08031-5#
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