Photovoltaic Response of Liquid Phase Exfoliated Graphene - MoS2 Heterostructures

Date

2024-08-15

Author

Javaid, Asad
Karamat, Shumaila
Khalique, Uzma
Naseer, Hisham
Sharif, Parisa
Oral, Ahmet
Akram, Rizwan

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This work reports the utilization of a simple liquid exfoliation technique to synthesize graphene and MoS2 layers and their subsequent integration in a multilayer heterostructure device with a photovoltaic response. XRD diffraction supports the polycrystalline nature of graphene and MoS2 whereas Raman spectroscopy confirms the optical signatures of graphene, MoS2, and their heterostructure. SEM confirms the few-layer formation of small graphene and MoS2 flakes which give large area coverage when spin-coated on substrates. MoS2=graphene=n-type c-Si heterostructure solar cell was formed using the spin coating technique and thermal evaporation method. The photovoltaic performance of the cell was evaluated by current–voltage (I–V) characterization under illumination, resulting in an efficiency of 4.02%, an open circuit voltage (Voc) of 0.47 V, short circuit current density (Jsc) of 18.6 mA=cm2, and fill factor (FF) of ∼45.5. These results suggested that the fabricated MoS2=graphene heterostructure acts as a hole transport layer for n-type c-Si solar cells which could open the possibility of a large area and low-cost photovoltaics.

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https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85198115360&origin=inward
https://hdl.handle.net/11511/110221

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Department of Physics, Article