Abstract:

Inter-molecular excited states are essentially inter-molecular electron-hole pairs with tunable electric and magnetic dipoles in organic semiconducting materials. It has been experimentally observed that inter-molecular excited states are sensitive to a low magnetic field (< 100 mT), leading to a magnetic field-dependent singlet/triplet ratio. Because the singlets and triplets have distinctly different optic, electric, and thermoelectric properties, magnetic field-dependent singlet/triplet ratio in intermolecular excited states can effectively exhibit spintronic effects. Therefore, intermolecular excited states have become a very encouraging research area towards magnetic control of optic, electric, and thermoelectric effects. We have found that inter-molecular excited states can exhibit an intrinsic coupling between electric permittivity and magnetic permeability. The intrinsic coupling between permittivity and permeability presents an essential mechanism to realize magneto-optic, magneto-electronic, and magneto-thermoelectric effects by using inter-molecular excited states. This presentation will discuss the recent progress and key issues in organic spintronics developed by inter-molecular excited states.
 
 
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