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Traces of non‐magnetic atoms at the grain boundaries can effectively increase the coercivity of sintered Nd–Fe–B magnets. These atoms also have chance to occupy crystallographic Fe sites in NdFeB, which may force the unbound Fe to precipitate at the grain boundaries and thus destroy the nonmagnetic properties of the grain boundaries. In order to provide the thermodynamic evidences of Fe migration...
White organic light‐emitting diodes with three successively spin‐coated layers, poly(3,4‐ethylenedioxythiophene):polystyrene sulfonate, poly(N‐vinylcarbazole) and small‐molecule emissive layer (EML) in turn, and a vacuum‐deposited electron‐transporting layer (ETL) have been prepared. The EML includes a host bis[2‐(4‐(N,N‐diphenylamino)phenyl)vinyl]biphenyl, blue dopant 4,4′‐bis[2‐(4‐(N,N‐diphenylamino)phenyl)vinyl]biphenyl...
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