研究目的
Investigating the impact of mobile ions on the steady-state performance of perovskite solar cells, focusing on carrier collection efficiency and the influence of dopants and energy band alignment.
研究成果
Mobile ions in perovskite solar cells can screen the internal electric field, leading to carrier transport dominated by diffusion. This transformation only adversely affects device efficiency when the carrier mobility-lifetime product is limited. High dopant concentrations are necessary to measurably impact performance, while energy band alignment can induce a doping-like effect, generally detrimental to efficiency. The study underscores the importance of minimizing non-radiative recombination and optimizing carrier mobility to mitigate the negative effects of mobile ions.
研究不足
The study focuses on steady-state conditions and does not extensively explore transient phenomena. The simulations are based on representative values for MAPbI3, and the findings may not directly apply to all perovskite materials. The impact of interface recombination is not considered, focusing solely on bulk effects.
