The Effect of Magnetic Field on Thick Ir(ppy)$_{\bf 3}$ : Ir(mpp)$_{\bf 3}$ Nonmagnetic Organic Transistor With Improved Performance by Film Deposition on Heated Substrate

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 × 10
⁶
were obtained compared to 219 and 2.06 × 10
⁶
for an identical device prepared at 26°C, respectively. Magnetocurrent effect of ~28% was obtained with applied 2 T and 110°C.