Abstract
This chapter serves as an introduction to the general working principles of solar cells. It starts from the thermodynamics of terrestrial solar cells and fundamentals of semiconductor-based photovoltaics, where the theoretical limits of efficiency and open-circuit voltage as a function of the bandgap are discussed. The chapter describes the prediction of the open-circuit voltage when the photovoltaic action spectra and the electroluminescence quantum efficiency are known. The role of subgap states and several sources of nonradiative recombination, including interfaces to the charge-transport layers, are investigated at open-circuit voltage and fill factor of state-of-the-art perovskite solar cells. Based on these factors, organic–inorganic perovskite solar cells with different architectures and compositions are compared with other solar cell technologies. Low disorder and weak nonradiative recombination are shown to be responsible for the superior performance of mixed cation mixed halide perovskite solar cells, allowing for open-circuit voltages of 1.2 V to be achieved at a bandgap of 1.6 eV.
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Acknowledgments
I thank Amita Ummadisingu for carefully reading the text and suggesting improvements regarding language. Marko Stojanovic, Juan Pablo Correa Baena, T. Jesper Jacobsson, Yiming Cao, and Somayyeh Gholipour are acknowledged for commenting on the manuscript. I thank Dongqin Bi for providing I:Br samples, and Clémentine Renevier and Björn Niessen for the collaboration regarding the characterization of those samples. Financial support from SNF-NanoTera (SYNERGY) is kindly acknowledged.
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Tress, W. (2016). Maximum Efficiency and Open-Circuit Voltage of Perovskite Solar Cells. In: Park, NG., Grätzel, M., Miyasaka, T. (eds) Organic-Inorganic Halide Perovskite Photovoltaics. Springer, Cham. https://doi.org/10.1007/978-3-319-35114-8_3
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DOI: https://doi.org/10.1007/978-3-319-35114-8_3
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