Study of Diffusion Length of Charge Carriers in Perovskite Solar Cells
Hooman Mehdizadeh Rad a, Jai Singh a
a Charles Darwin University
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV19)
Roma, Italy, 2019 May 12th - 15th
Organizers: Prashant Kamat, Filippo De Angelis and Aldo Di Carlo
Poster, Hooman Mehdizadeh Rad, 002
Publication date: 11th February 2019


Solving the drift- diffusion equations the diffusion length of charge carriers in the active layer of a perovskite solar cell (PSC) of the structure Glass/PEDOT: PSS/ CH3NH3PbI3 /PC60BM/Al is modelled. Calculations of the diffusion length of charge carriers as a function of position x in the active layer show that the diffusion length within the active layer changes from one position to another by more than two orders of magnitude under the short circuit current condition (zero applied voltage). Also, it is shown that the dependence of diffusion length on the position x in the active layer reduces by increasing the applied voltage. The combined influence of applied voltage and temperature on the diffusion length of charge carriers is investigated and it is found that at low applied voltage the diffusion length is temperature independent but by increasing the applied voltage the influence of temperature on the diffusion length becomes significant.

Keywords: Perovskite solar cells, Diffusion length, Position in the active layer, Applied voltage, Temperature,

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