Effect of Chlorine in Perovskite Layers Morphology and Efficiency of Perovskite Solar Cells in One step & Spin-Dip Deposition Methods

Subject Areas : journal of New Materials

Hamaneh Zarenezhad ¹ (Sharif University of Technology, International Campus-Kish Island, Iran)
Mohammad Halali ² (Faculty of Department of Materials Science and Engineering, Sharif University of Technology, Tehran)
Masoud Askari ³ (Faculty of Department of Materials Science and Engineering, Sharif University of Technology, Tehran)

Received: 2018-06-14 Accepted : 2018-12-15 Published : 2019-01-21

Keywords: perovskite solar cells, efficiency, morphology, chlorine, spin coating,

Abstract :

Global energy crisis caused by the rapid growth in world population and industrial growth as well as the rapid development of the society and electricity-consuming devices increases day by day and may become a crisis. Among all renewable energies, solar energy is the most promising and easy access to the energy resource to solve the global energy crisis. Perovskite solar cells have been developed as a superior photovoltaic device owing to their high photovoltaic performance and low cost of manufacturing. In all structure of perovskite solar cells, the morphology of perovskite layers plays an important role for photovoltaic performance. The formation of a compact and uniform perovskite layer with large crystal size is a significant factor to get the best device performance and efficiently. In this work, chlorine was used in precursor perovskite solution of common perovskite structure(CH3NH3PbI3) in one step deposition method (OSD) and spin-dip deposition method (SDM) to prepare mesoporous perovskite solar cells to increase cells efficiency by getting compact and smooth perovskite layers. SEM, XRD and current density-voltage (J-V) measurements by solar cell characterization were used to investigate cell performance. As a result, in the presence of chlorine in both OSD and SDM methods power conversion efficiency has been enhanced from 3.87% to 6.76% and from 7.84% to 10.27% respectively.

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