Effects of ion migration and improvement strategies for the operational stability of perovskite solar cells

Abstract

The fundamental factor (ion migration) affecting the stability of perovskite solar cells and improvement strategies have been reviewed.

Halogen‐Bonded Hole‐Transport Material Suppresses Charge Recombination and Enhances Stability of Perovskite Solar Cells

“…It is believed that ion migration is one of the primary sources for PCSs' intrinsic degradation. [61,62] Indeed this phenomenon leads to vacancies and other defects, therefore increasing the number of recombination centers. Moreover, ions can accumulate at interfaces and create unfavorable electric fields.…”

Thermodynamic stability screening of IR-photonic processed multication halide perovskite thin films

“…The JV parameters shown by the device denote an efficient solar cell that is quite similar to other related results reported in the literature with other specic compositions. 12,13,92 However, the little hysteresis shown can be related to the typical roughness of the perovskite crystal growth, impeding a smoother interface with the holetransport material. Other phenomena related to the hysteresis of the cell are the photoinduced bulk polarization effect, which can be attributed to the rotational barrier of the cations upon photoexcitation.…”

“…Other phenomena related to the hysteresis of the cell are the photoinduced bulk polarization effect, which can be attributed to the rotational barrier of the cations upon photoexcitation. 92,93 It would be considered for future device correlation studies focusing on reducing defect points rather than material detection.…”

Organic–inorganic hybrid perovskite for low-cost and high-performance xerographic photoreceptors

“…And also, I À and MA + ions in the perovskite layer would migrate across the device under an electric eld. [22][23][24][25] Therefore, both the charge carriers and the mobile ions may be responsible for the high dark conductivity in the pristine perovskite device.…”