Temperature effects on the electrical characteristics of Al/PTh−SiO$_2$/p-Si structure

Bulletin of Materials Science

关键词: Schottky barriers;    polymers and organics;    composite materials;    metal–insulator–semiconductor structures.;   

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The temperature-dependent current–voltage ($I –V$) and capacitance–voltage ($C–V$) characteristics of the fabricated Al/p-Si Schottky diodes with the polythiopene–SiO$_2$ nanocomposite (PTh–SiO$_2$) interlayer were investigated.The ideality factor of Al/PTh–SiO$_2$/$p$-Si Schottky diodes has decreased with increasing temperature and the barrier heighthas increased with increasing temperature. The change in the barrier height and ideality factor values with temperaturewas attributed to inhomogeneties of the zero-bias barrier height. Richardson plot has exhibited curved behaviour due totemperature dependence of barrier height. The activation energy and effective Richardson constant were calculated as0.16 eV and $1.79 \times 10^{−8}$ A cm$^{−2}$ K$^{−2}$ from linear part of Richardson plots, respectively. The barrier height values determined from capacitance–voltage–temperature ($C–V–T$) measurements decrease with increasing temperature on the contrary of barrier height values obtained from $I –V–T$ measurements.

【 授权许可】

CC BY