Single-molecule optoelectronic devices: physical mechanism and beyond

Single-molecule devices not only promise to provide an alternative strategy break through the miniaturization and functionalization bottlenecks faced by traditional semiconductor devices, but also a reliable platform for exploration of intrinsic properties matters at single-molecule level. Because regulation electrical will be key factor in enabling further advances development molecular electronics, it is necessary clarify interactions between charge transport occurring device external fields, particularly optical field. This review mainly introduces optoelectronic effects that are involved including photoisomerization switching, photoconductance, plasmon-induced excitation, photovoltaic effect, electroluminescence. We summarize mechanisms with particular emphasis on photoisomerization, photoexcitation, photo-assisted tunneling processes. Finally, we focus discussion opportunities challenges arising optoelectronics field propose possible breakthroughs.