Interplays between charge and electric field in perovskite solar cells: charge transport, recombination and hysteresis

Abstract

Interplays between charge and electric field, which play a critical role in determining the charge transport, recombination, storage and hysteresis in the perovskite solar cell, have been systematically investigated by both electrical transient experiments and theoretical calculations. It is found that the light illumination can increase the carrier concentration in the perovskite absorber, thus enhancing charge recombination and causing the co-existence of high electric field and free carriers. Meanwhile, the cell shows a similar charge storage and junction mechanism to that of the multicrystalline silicon solar cell, where the junction electric field determines the charge collection and distribution. Furthermore, it is demonstrated that the static charge of both the doping and defect coming from ion (vacancy) migration can significantly influence the electric field inside the cell, thus affecting the charge collection and recombination, which could be the origins for the widely-concerned hysteresis behaviors.

Cited by in corpus (6)

• A precisely regulating phase evolution strategy for highly efficient kesterite solar cells
• Exploiting Electrical Transients to Reveal Charge Loss Mechanism of Junction Solar Cells
• Multinary Alloying Suppresses Defect Formation in Emerging Inorganic Solar Cells
• Controlling selenization equilibrium enables high-quality Cu2ZnSn(S, Se)4 absorbers for efficient solar cells
• Defect Regulation by Palladium Incorporation towards Grain Boundaries of Kesterite solar cells
• Heterojunction interface regulation to realize high-performance flexible Kesterite solar cells