The Effect of Magnetic Field on Thick Ir(ppy) $_{\bf 3}$ : Ir(mpp) $_{\bf 3}$ Nonmagnetic Organi

In this paper, we examined the influence of magnetic field with different substrate temperatures during the deposition of the Ir(ppy):Ir(mpp) blend layer heterojunction organic nonmagnetic organic transistor. It is shown that substrate heating treatment during evaporation leads to a significant improvement in the nonmagnetic metal-base transistor performance mainly due to an increase in current gain and ON-to-OFF current ratio. This is attributed to the improvement of thermal energy. Upon heating the substrate to 110°C in the presence of magnetic field, current gain and ON-to-OFF current ratio of 281 and 3.30 × 10⁶ were obtained compared to 219 and 2.06 × 10⁶ for an identical device prepared at 26°C, respectively. Magnetocurrent effect of ~28% was obtained with applied 2 T and 110°C.