To reduce the noxious outcome of fossil fuel combustions, renewable sources of energy should be put into practice among which the solar energy is most accessible. Solar cells can convert solar energy to electricity directly and they have different types. One of the novelest and most efficient solar cells is perovskite solar cells (PSCs). The power conversion efficiency (PCE) of PSCs has grown drastically in the last few years and reached higher than 23% [1, 2]. However, the poor stability of PSCs hinders their commercialisation.
One of the factors that can influence the PCE and stability of PSCs is their operating temperature. High temperatures may reduce PCE as well as may lead to degradation of the active perovskite layer. In this research, by developing a mathematical model, the temperature of PSCs under different operating conditions has been calculated. It is found that by reducing the density of tail states at the interfaces through some passivation mechanisms, the temperature of operation can be decreased significantly. The results show that if the density of tail states at the interfaces is reduced by three orders of magnitude through some passivation mechanisms, the stability of PSCs may increase significantly. It is expected that this study culminate in an increase in the stability of PSCs.