The Influence of the Relaxation Time on the Dynamic Hysteresis in Perovskite Solar Cells

The Influence of the Relaxation Time on the Dynamic Hysteresis in Perovskite Solar Cells

Publication Type:

Book Chapter

Source:

Mathematical Modeling and Computational Physics 2017, Volume 173 (2018)

ISBN:

978-2-7598-9034-7

Abstract:

<p>We investigate the dynamic behavior of perovskite solar cells by focusing on the relaxation time tau, which corresponds to the slow de-polarization process from an initial bias pre-poled state. The dynamic electrical model (DEM) is employed for simulating the J-V characteristics for different bias scan rates and pre-poling conditions. Depending on the sign of the initial polarization normal or inverted hysteresis may be induced. For fixed pre-poling conditions, the relaxation time, in relation to the bias scan rate, governs the magnitude of the dynamic hysteresis. In the limit of large tau the hysteretic effects are vanishing for the typical range of bias scan rates considered, while for very small tau the hysteresis is significant only when it is comparable with the measurement time interval.</p>