Application of Graphene Oxide Quantum Dots in Planar Perovskite Solar Cell

Subject Areas : journal of New Materials

Zahra Hosseini ¹ (Faculty of Advanced Technologies, Shiraz University, Shiraz, Iran.)
Azin Babaei ² (Instituto de Ciencia Molecular, University of Valencia, 46980 Paterna, Spain.)

Received: 2021-08-25 Accepted : 2021-12-12 Published : 2021-08-23

Keywords: Solar Cell, Graphene oxide, Perovskite, Quantum Dot, Planar Structure,

Abstract :

Abstract Introduction: Carbon is cheap and abundant in nature which can significantly reduce the cost of solar cell fabrication. In recent years, carbon nanostructures have gained special attention for application in perovskite solar cells. Methods: In this research, graphene oxide quantum dots (GOQDs) have been used in a planar perovskite solar cell. For this purpose, GOQDs with sizes smaller than 10 nm were synthesized by the hydrothermal method. The GOQDs were spin coated on ITO to make a planar n-i-p perovskite solar cell with the structure ITO/GOQD/MAPbI₃/Spiro-OMETAD/Ag. Findings: The absorption spectrum of the GOQDs shows no overlap with absorption band of the MAPbI₃ perovskite layer. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis show that a uniform film of crystalline MAPbI₃ perovskite has been formed on the GOQD layer. The best device performance achieved in this research for the planar perovskite solar cell is as follows: Jsc=21.9 mA/cm², Voc=1.02 V, FF=0.67 and PCE=15%.  

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