Direct observation of surface polarization at hybrid perovskite/Au interfaces by dark transient experiments

• Published in: Applied physics letters Vol. 116; no. 18
• Main Authors: Caram, Jorge, García-Batlle, Marisé, Almora, Osbel, Arce, Roberto D., Guerrero, Antonio, Garcia-Belmonte, Germà
• Format: Journal Article
• Language: English
• Published: Melville American Institute of Physics 04.05.2020
• Subjects: Applied physics; Bias; Capacitance; Charging; Circuits; Electric potential; Electrode polarization; Electromagnetic absorption; Interface stability; Ion currents; Modulation; Perovskites; Perturbation; Steady state; Voltage

A distinctive feature of hybrid perovskite light-absorbing materials is the non-negligible ionic conductivity influencing photovoltaic performance and stability. Moving ions or vacancies can naturally accumulate at the outer interfaces (electrode polarization) upon biasing. Contrary to that approach...