Effect of Poly (Linolenic acid)-g-Poly (Caprolactone)-g-Poly (t-butyl acrylate) (PLilPCLPtBA) Graft Copolymer Interfacial Layer on Au/n-Si Diode Parameters

Poly (linolenic acid)-g-poly (caprolactone)-g-poly (t-butyl acrylate) (PLilPCLPtBA) graft copolymers were used as interfacial layer in Au/n-Si Schottky diodes. Au/n-Si (MS) and Au/PLilPCLPtBA/n-Si (MPS) diodes were fabricated to explore the usability of this graft copolymer as interfacial layer and investigate its electro-optical effects on the diodes. PLilPCLPtBA polymer layer was coated on n-Si single crystal by electrospinning method. Surface morphology and nano fiber characteristics of this layer were investigated using an electron microscope. The current-voltage (I-V) measurements of the MS and MPS diodes were performed under dark, halogen lamp and UV (365 nm) illumination conditions at room temperature. Main electrical parameters such as reverse bias saturation current (Io), zero bias barrier height (ФBo), ideality factor (n), series resistance (Rs), shunt resistance (Rsh) and interface state density (Nss) of the diodes were extracted from I-V measurements. The obtained values are given as a comparison for each illumination conditions.