Fundamentals of Solar Cell Design. Rajender Boddula

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cells (DSSCs). Here, the simple construction and working mechanism besides various components of DSSCs are elaborately discussed. Also, the various materials used for electrolytes and natural dyes are explained briefly along with performances of DSSCs.

      Chapter 7 addresses various computational methodologies from molecular mechanics to quantum mechanics for evaluation of compounds in terms of structural and electronic properties. The main objective is the assessment of photovoltaic parameters including absorption spectra, charge transfer, open-circuit voltage, peak current density, efficiency in light, and molecular descriptors toward the efficient performance of solar cells.

      Chapter 9 describes the developments in photovoltaic materials and related devices. Brief description of solar cell generations and the factors that affect efficiency are reviewed. The prospects regarding practices to enhance the conversion efficiencies are shortly presented.

      Chapter 10 discusses the efficiencies and materials of conventional, modern, and emerging solar cell technologies. The use of inorganic, organic, and hybrid materials for a rational design of solar cells is discussed in detail. Additionally, the challenges faced by solar cell technologies and performance enhancement techniques are also discussed briefly.

      Chapter 11 highlights the latest and emerging characterization tools to study and investigate the properties and efficiency of solar cells. The emerging characterization tools discussed in this chapter are conductive atomic force microscopy, electron tomography, transient absorption spectroscopy, Kelvin probe microscopy, and surface morphology observation.

      Chapter 12 briefly describes the historic evolution, fundamental properties, and working principles of photovoltaic cells of various types. The discussion about the efficiency and applications of these solar cells helps the new researchers to develop new technologies and improve their work in the area of solar cell systems.

      Chapter 13 gives a detailed overview of the current efforts to enhance the stability of perovskite solar cell; moreover, the degradation causes and mechanisms are summarized. The strategies to improve device stability are portrayed in terms of structural effects, a photoactive layer, holeand electron-transporting layers, electrode materials, and device encapsulation.

      Chapter 14 presents the progress of solar cells and their latest developments. The major goal is to show how they can be utilized for photovoltaic energy generation as a renewable energy source. This will help to identify the challenges and drawing prospects for the researchers in this field to further improve and develop solar cells and their applications.

      Chapter 15 discusses the design, materials, and applications of semitransparent perovskite solar cells. Different device architectures and the performance evaluation parameters are discussed in detail. The materials used in the photoactive layer, charge transport layers, and transparent electrodes are also presented in addition to the major applications and future scope of semitransparent perovskite solar cells.

       Inamuddin

       Mohd Imran Ahamed

       Rajender Boddula

       Mashallah Rezakazemi

      June 2021

      1

      Organic Solar Cells

       Yadavalli Venkata Durga Nageswar1* and Vaidya Jayathirtha Rao2

       1CSIR - Indian Institute of Chemical Technology, Hyderabad, India

       2Hetero Research Foundation, TSIE, Balanagar, Hyderabad, India

       Abstract

      Limitations faced in using fullerene as an acceptor molecule in BHJOSCs directed research toward non-fullerene–based acceptors in BHJOSCs. Polymer donor and small-molecule acceptor combination is successfully explored to develop higher performance BHJOSCs. Various novel small acceptor organic materials are synthesized and fabricated as sBHJOSCs in combination with suitable polymer donors available. Performances of organic solar cells improved to over 17%, and further, it may cross even 20%. Simultaneously, researchers explored fullerene all small molecules for BHJOSCs. All small-molecule BHJOSCs do not use polymer donor due to certain limitations. Progress achieved from these investigations is remarkable and the efficiency displayed is around 14%. Both the research lines are found to be exceptional and will provide further improvement in the solar cell efficiency. Various examples discussed in this chapter deal with the recent research results reported in the literature on both the research domains.

      Keywords: UV-visible absorption, device architecture, film morphology, non-fullerene blends, all small organic molecules, optical band-gap, photovoltaic parameters, photo conversion efficiency

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