Assoc. Prof. Dr. Md. Akhtaruzzaman
The National University of Malaysia
Research area: New cell structure, Intelligent materials, Solar cells, Photovoltaic device
Title: The Advancement of Inorganic Hole Transport Materials Towards Emerging ThirdGeneration Thin Flim Solar cells
Abstarct: Organic-inorganic hybrid solar cells (OIHSCs) such as perovskite solar cells (PSCs), dye-sensitized solar cells (DSCs) and bulk heterojunction solar cells (BHJSCs) have a growing interest in thin-film photovoltaic technology due to their lightweight, flexible and low-cost manufacturing processes [1,2]. However, there are a number of issues that currently restrict the commercialization of OIHSCs due to their efficiency, stability and reproducibility and fabrication in a large area. Numerous hole transport materials (HTMs) such as spiro-OMeTAD, poly(triarylamine), PEDOT: PSS, which are mostly organic derivatives, have already been established and incorporated into OIHSCs. Organic HTMs are unstable in water, heat and light, which ultimately reduces the stability of OIHSC. The synthesis and complex purification costs of organic hole transport materials are also another drawbacks in exiting OIHSCs. As a result, various inorganic metal oxides such as CuO, MoO3, WO3, NiOx, Cr2O3, etc. as HTMs have promising outcomes such as improving the carrier transporting properties within solar cell devices with higher life-time and stability. Among them, NiOx has recently gained significant attention due to its excellent optical, and electrical properties, along with its good chemical stability and easy fabrication of optically transparent dense films by several techniques. To further enhance the operational stability of OIHS, simultaneous system engineering such as interface modification of HTL / absorber layer, tuning of the crystallinity, morphology, and defect engineering should be considered to realize their full potential. Various experimental techniques would be investigated to find both the stability and performance of organic-inorganic hybrid solar cells towards the flexible solar energy revolution.