Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV19)
Publication date: 6th February 2020
We present theoretical work linking two models of organic solar cells, the Gaussian disorder model as well as differential equations describing the drift, diffusion, generation and recombination of charge carriers. In the Gaussian disorder model, the charge carriers are localised at randomly distributed sites, with possible energies following a Gaussian distribution. The hopping rates between any two sites depend on their distance as well as on the corresponding energies and can be taken as Marcus rates. We show that in a continuum limit, the Gaussian disorder model can be mapped first to master equations for electrons and holes and then after Taylor expansion of the integrand to differential equations. This approach establishes relations between the free parameters of both models and yields corrections to the differential equations. In particular it allows to study the dependence of the electron and hole concentration on energy, and investigate the energies for which states contribute most strongly to the transport of charge carriers.
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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