Achieving high-performance room-temperature organic ferromagnetic semiconductor films via topochemical reduction

-nearly an order of magnitude higher than conventional organic magnetic materials-while retaining semiconducting properties. Generality of this strategy has also been demonstrated in naphthalene-based systems, underscoring its broad applicability. Theoretical calculations reveal that this enhanced performance originates from optimized ferromagnetic coupling between adjacent radicals through controlled twisted stacking configurations. This work provides a practical route to high-performance ferromagnetic semiconductors.