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Morphology Analysis of Lead Iodide- And Lead Acetate based Perovskite Layers for Solar Cell Application

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Description

Download Morphology Analysis of Lead Iodide- And Lead Acetate based Perovskite Layers for Solar Cell Application. Materials Science and Engineering students who are writing their projects can get this material to aid their research work.

Abstract

Organolead trihalide perovskite solar cells have shown success as light absorbers in photovoltaic cells due to their efficiency increasing from 3.5% to over 20% within only five years.

However, pinhole formation and incomplete coverage of solution-processed perovskite film results in increased current leakage, reducing efficiency. Hence the surface morphology of perovskite film is important for high performance of perovskite solar cells.

Here the morphology is carefully controlled by varying processing conditions, perovskite films were prepared using two different lead sources: lead acetate (Pb(OAc)2) and lead iodide (PbI2), with methylammonium iodide (CH3NH3I) as the source material.

The structural, optical and absorbance properties of the perovskite films varied with the lead sources used, perovskite from a Pb(OAc)2.3 H2O source annealed at 90oC gave the best structure compared to Pb(OAc)2.3H2O annealed at 80oC and anhydrous Pb(OAc)2 annealed at 90oC.

Introduction

The growing global population and industrialisation have led to the continuous increase in demand for energy. Global energy demand is predicted to be as high as 1GW/day, which places substantial pressure on current energy infrastructures (Wang, Wright, Elumalai & Uddin, 2016).

The supply of fossil fuels is consistently declining and cannot satisfy the huge energy demands in the nearest future.

These challenges, in addition to the danger of climate change, have necessitated the development of energy from renewable energy sources, which are environmentally friendly and sustainable.

Among the probable renewable energy technologies, photovoltaic (PV) solar cells, which convert sunlight into electricity, provide a promising solution; solar power is the most abundant energy source in the world (Zulkifli & Bahtiar, 2016).

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