Ahmed Mourtada Elseman

By Ahmed Esmail Shalan, Ahmed Mourtada Elseman and Mohamed Mohamed Rashad

In this chapter, we review the controlling of the microstructures, the properties, and the different methods to obtain titanium dioxide and the application of these materials on solar cells. We will concentrate on the application of efficient solar cells including dye-sensitized solar cells (DSSCs). In the first section, we provide a background on energy, including its sources—photovoltaics and titanium dioxide—and the advantages of their application in solar cells. The second section outlines the different methods to obtain TiO2 nanoparticles. The shapes of titanium dioxide are explored in the third section. In the fourth section, we discuss the use and effect of the titanium dioxide in the efficient dye-sensitized solar cells, and the last section is a summary of the current state of the art and perspectives of titanium dioxide for efficient solar cells.

Part of the book: Titanium Dioxide

By Ahmed Mourtada Elseman, Sajid, Dong Wei, Ahmed Esmail Shalan, Mohamed Mohamed Rashad and Meicheng Li

The power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) have been reached the initial value when they emerged as dye sensitized solar cell (DSSC) in 2012. Immediately, the interests were drawn in this field worldwide. The researchers have improved the efficiency of PSCs up-to 22%, which was originally started from its initial value of 3.8%, just in 7 years. The rendering of long‐term stabilization and effective cost have special importance for PSCs since the instability issue remained idle in spite of those recently increased efficiency values attained by various research groups. In this way, the better improvements of PSC may increase extraordinary exhibitions as compared to alternate solar cells like organic solar cell (OSC) or DSSC devices. This chapter begins with a general discussion on the requirement for an economical clean energy conversion device. In section 2, fundamental properties of PSC are fit together with their device architecture and working mechanism. In section 3 proceeds with a review on fundamental photovoltaic parameters joined by current-voltage hysteresis. Furthermore, the stability and cost issues will be discussed in Sections 4 and 5. In the end of this chapter, we are discussing the challenges and opportunities based on the chapter content.

Part of the book: Emerging Solar Energy Materials

By Ahmed Mourtada Elseman

The organometal halide perovskite solar cells (PSCs) have attracted attention and achieved efficiencies compared with traditional solar cells. There are several ways to develop perovskite solar cells like effect of moisture, degradation, and understanding the reason for instability of perovskite. In this chapter, we are specified how to make coating and film fabrication are affected by the existing methods. Improvement in the photovoltaic performance of PSCs can be achieved by enhanced processing technique. These techniques include the spin-coating PbI2 solution controlling the substrate temperature and crystal quality of the morphology for perovskite films. There is no doubt that film coating indicates that the crystallization and morphology of perovskite films affect the absorption intensity and obviously influence the short-circuit current density. This study points out an enhancement of the stability of perovskite films and solar cells by reducing residual strains in perovskite films.

Part of the book: Coatings and Thin-Film Technologies

By Alaa E. Abd El-Samad, Radwa S. Mostafa, Hager H. Zeenelabden, Menahtullah M. Mabrouk, Ahmed Mourtada Elseman, Nasr Gad, Mostafa El-Aasser and Mohamed M. Rashad

The 3D-perovskite halides have gained a considerable reputation versus their counterpart semiconductor materials since they achieved a remarkable high-power conversion efficiency of 25.2% within a decade. Perovskite solar cells also have some problems as lattice degradation and sensitivity against moisture, oxygen, and strong irradiation. The perovskite instability is the drawback in front of this emerging technology towards mass production and commercialization. 2D-perovskites, with the general formula A2Bn − 1MnX3n + 1, have been recently introduced to overcome some of the drawbacks of the stability of 3D-perovskites; however, this is at the expense of sacrificing a part of the power conversion efficiency. Mixed 2D/3D perovskites could solve this dilemma towards the way to high stability-efficiency perovskites. The research is expected to obtain highly stable and efficient mixed 2D/3D perovskite solar cells in the few coming years. This chapter reviews 2D-perovskites’ achieved progress, highlighting their properties, current trends, challenges, and future prospects.

Part of the book: Solar Cells