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Intrinsic traps, carrier transport

The dissociation of an exciton in a polymer/fullerene BHJ does occur within tens of fs. This may allow both the presence of hot excitons and for electron transfer to a distribution of electron-hole distances. The subsequent transport of the free holes delocalised on polymer chains is also very fast and has two contributions. The initial hole mobility is comparable to the polymer intrinsic mobility and is assigned to hot holes. These cool down at a fast rate of (1/180) fs and are trapped at an initial rate of (1/860) fs [69]. At longer times, the conductivity decreases and represents the equilibrium population of mobile and trapped charge carriers. [Pg.286]

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See also in sourсe #XX -- [ Pg.390 ]



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