Impact of interfacial molecular orientation on radiative recombination and charge generation efficiency.

ABSTRACT: A long standing question in organic electronics concerns the effects of molecular orientation at donor/acceptor heterojunctions. Given a well-controlled donor/acceptor bilayer system, we uncover the genuine effects of molecular orientation on charge generation and recombination. These effects are studied through the point of view of photovoltaics-however, the results have important implications on the operation of all optoelectronic devices with donor/acceptor interfaces, such as light emitting diodes and photodetectors. Our findings can be summarized by two points. First, devices with donor molecules face-on to the acceptor interface have a higher charge transfer state energy and less non-radiative recombination, resulting in larger open-circuit voltages and higher radiative efficiencies.

SUBMITTER: Ran NA 

PROVIDER: S-EPMC5517510 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature