Effect of Gadolinium on Electrical Properties of Polyethyleneimine Functionalized and Nitrogen-Doped Graphene Quantum Dot Nanocomposite Based Diode

Date

2023-01-01

Author

ORHAN, ELİF
ANTER, ASLIHAN
ULUSOY, MURAT
Polat, Barış
Okuyucu, Can
YILDIZ, MUSTAFA
ALTINDAL, ŞEMSETTİN

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Carbon, especially graphene quantum dots (GQDs) based electronics have become an attractive technology in recent years. The controlled modification of the electrical and optoelectronic properties of GQDs by physical/chemical processes or synthetic methods may lead to new applications. Gadolinium-doped polyethyleneimine (PEI) functionalized and nitrogen-doped graphene quantum dots (GdNPs-PEI@N-GQDs) are synthesized by a hydrothermal method to determine how doping carbon-based materials with Gd alters the electrical properties of the structure. The electrical properties of the GdNPs/PEI@N-GQDs nanocomposite-based diode are investigated using the current–voltage (I–V) technique and the capacitance and conductance voltage (C–V & G/ω–V) technique at 300 K in the frequency range of 0.5 to 500 kHz at ± 5 V. The rectification ratio (RR) is found to be 14 at a voltage of ±5 V. The rectifying behavior of the diode changes to an ohmic behavior after doping with Gd, compared to the Gd-free PEI@N-GQDs sample (2.8 × 104 at ±5 V). The results are expected to have an impact on the understanding of carbon-based electronics technology.

Subject Keywords

diodes, gadolinium, graphene quantum dots, PEI@N/GQDs, polyethyleneimine functionalized nitrogen-doped graphene quantum dots

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85164192333&origin=inward
https://hdl.handle.net/11511/104703

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Department of Metallurgical and Materials Engineering, Article