Steady-State Photoconduction in Amorphous Organic Solids

摘要: By applying various experimental techniques, e.g., transient absorption in a strong electric field and delayed collection of charge carriers, it has been proven that neat conjugated polymers singlet excitations can dissociate into pairs free carriers field. Random walk theory developed to treat this process analytically. At variance conventional 3D Onsager is assumed an exciton with finite lifetime first transfer endothermically electron adjacent site, thereby generating state whose energy above the initial exciton. In second step latter fully accordance Onsager’s concept Brownian motion. The results indicate that, depending on required for jump, jump contributes significantly dependence dissociation yield. Disorder weakens temperature yield dramatically precludes extracting information binding from it. chapter will also address problem photogeneration donor–acceptor blends used organic photovoltaic cells emphasize crucial role geminate recombination electron–hole pair at internal interface.