Abstract
We report formation of polycarbazole (PCz)–graphene nanocomposite over indium tin oxide (ITO) coated glass substrate using electrochemical technique for fabrication of high performance Schottky diodes. The synthesized nanocomposite is characterized before fabrication of devices for confirmation of uniform distribution of graphene nanosheets in the polymer matrix. Pure PCz and PCz-graphene nanocomposites based Schottky diodes are fabricated of configuration Al/PCz/ITO and Al/PCz-graphene nanocomposite/ITO, respectively. The current density–voltage (J-V) characteristics and diode performance parameters (such as the ideality factor, barrier height, and reverse saturation current density) are compared under ambient condition. Al/PCz-graphene nanocomposite/ITO device exhibits better ideality factor in comparison to the device formed using pure PCz. It is also observed that the Al/PCz-graphene nanocomposite/ITO device shows large forward current density and low turn on voltage in comparison to Al/PCz/ITO device.
Highlights
Tunable functionality, flexibility, low cast, easy processibility and synthesis of conducting polymer, mainly conjugated polymer,[1,2,3] over inorganic semiconductors are attraction for researchers for fabrications of electronic device.[4,5,6,7] These features of organic conductors have opened a new possibility of replacing conventional expensive inorganic devices
We report formation of polycarbazole (PCz)–graphene nanocomposite over indium tin oxide (ITO) coated glass substrate using electrochemical technique for fabrication of high performance Schottky diodes
In view of above we explored electrochemical synthesis of conducting polymer-nanofiller composite and chosen PCz-graphene system as it is not developed and characterized yet to the best of our knowledge
Summary
Flexibility, low cast, easy processibility and synthesis of conducting polymer, mainly conjugated polymer,[1,2,3] over inorganic semiconductors are attraction for researchers for fabrications of electronic device.[4,5,6,7] These features of organic conductors have opened a new possibility of replacing conventional expensive inorganic devices. Organic material based field effect transistors (OFET), solar cell, light emitting diode (OLED), Schottky diode, sensor etc are the most important electronic devices for real life applications. These devices have already been developed by researchers in the recent years mainly using solution proccessible conducting polymers or organic conductors.[8,9,10,11,12]. To overcome mecahanical properties and stability problem, researchers have used insulating materials.[22] The use of such material which enhances the performance of poor semiconducting polymer devices as well as stability and mechanical property just by presence of smaller amount without changing its property This concept motivated the researchers to use composite material which consist of a high conducting material as filler.[23,24,25] There
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