Some Electrical and Photoelectrical Properties of Conducting Polymer Graphene Composite /n-Silicon Heterojunction Diode

Year 2022, Volume: 26 Issue: 5, 1000 - 1009, 20.10.2022

Elif Daş

https://doi.org/10.16984/saufenbilder.1129742

Abstract

In this study, polythiophene-graphene (PTh-G) composite thin film was prepared on the n-type silicon (n-Si) semiconductor wafer by the spin coating method. Subsequently, the current-voltage (I-V) measurements were made on the fabricated Au/PTh-G/n-Si/Al device to ascertain the impact of the PTh-G interfacial layer on the device performance. The main device parameters such as ideality factor (n), barrier height (b), series resistance (Rs) were calculated by using the thermionic emission (TE) and Norde functions, and then, the obtained results were discussed in detail. Additionally, the capacitance-voltage (C-V) characteristic of the device was examined as a function of the frequency, and the device parameters such as diffusion potential (Vd), Fermi energy level (Ef), carrier concentration (Nd), b were detemined. Finally, the light intensity-dependent I-V measurements were taken to obtain information about the photoelectrical characteristics of the fabricated device. The obtained results have shown that the prepared composite material has a good potential to be used in optoelectronic applications such as photodiode, and photodetector.

Keywords

Graphene, Polythiophene, Composite Material, Photoresponse, Photosensitivity

Supporting Institution

Yok

Project Number

Yok

Thanks

The author would like to thank the NANOGRAFI Company (Turkey) for supplying graphene in this study.

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