Berlin 2024 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 36: Poster III

HL 36.15: Poster

Mittwoch, 20. März 2024, 18:00–20:30, Poster E

Investigating the Electrical Performance of Exfoliated Mono-Layer and Few-Layer Graphene — •Yasaman Jarrahi Zadeh, Felix Schaumburg, Jens Kerski, Günther Prinz, Martin Paul Geller, and Axel Lorke — Faculty of Physics, University of Duisburg-Essen and CENIDE, Germany

The groundbreaking discovery of two-dimensional (2D) graphene in 2004 sparked immense interest owing to its extraordinary electrical properties. Graphene's exceptional electron mobility makes it an ideal material for semiconductor devices that require fast response times. Additionally, the number of layers of graphene affects its different properties [1]. This study investigates the electrical behavior of exfoliated mono-layer and few-layer graphene structures on a Si substrate with SiO_2 top layer. To accomplish this, we employ the Van der Pauw method and Hall effect measurements to comprehend conductivity, carrier mobility, and quantum transport phenomena in both mono-layer and few-layer graphene. However, the characterization of ultrathin 2D material-based devices using electrical techniques poses challenges, and the conventional methods of characterization require optimization. By obtaining the electrical properties of graphene most optimally, further steps will be to enhance the performance of semiconductor devices like transistors and photodetectors.

[1] Urade, A.R., Lahiri, I. & Suresh, K.S. Graphene Properties, Synthesis and Applications: A Review. JOM 75, 614-630 (2023).

Keywords: Graphene; Electrical Properties; Conductivity; Mobility