Heat mitigation in perovskite solar cells: The role of grain boundaries

Hooman Mehdizadeh-Rad, Farhad Mehdizadeh-Rad, Fu Rong Zhu, Jai Singh*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

11 Citations (Scopus)


We have simulated a perovskite solar cell by developing a comprehensive mathematical model which incorporates drift-diffusion and heat transfer equations. This model incorporates all the heat transfer mechanisms, including the thermal power generation due to the tail state recombination and thermalization of charge carriers. Our model is validated by calculating the current-voltage characteristics of a PSC of the structure of Glass/PEDOT: PSS/CH3NH3PbI3/PC60BM/Al and finding it in very good agreement with the experimental results. The influence of grain boundary diameter on the operating temperature of the PSC is investigated in detail. It is found that by increasing the diameter of the grain boundaries, the operating temperature of the PSC decreases at higher voltages and the open circuit voltage increases slightly. The thermal power generated by the thermalization is found to play the dominant role in the operating temperature followed by the thermal power generated at the grain boundaries due to the highest tail state recombination in the region. This study is expected to provide a deeper understanding about different factors that influence the operating temperature of perovskite solar cells.

Original languageEnglish
Article number110837
JournalSolar Energy Materials and Solar Cells
Early online date10 Oct 2020
Publication statusPublished - Jan 2021

Scopus Subject Areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

User-Defined Keywords

  • Grain boundaries
  • Operating temperature
  • Perovskite solar cells
  • Thermalization


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