POS6-1601
Hindered Phenols Enable Dual-Action Passivation and Reactive Oxygen Species Mitigation for Perovskite Solar Cells
When and Where
Nov 30, -0001
00:00 - 00:00
Room 301 (Grand Ballroom)
Presenter(s)
Qurrotun Ayuni Khoirun Nisa (Pukyong National University)
Co-Author(s)
Abstract
The efficiency of perovskite solar cells (PSCs) are critically limited by interfacial defects and environmental degradation induced by reactive oxygen species (ROS) and moisture. To address these challenges, we introduce multifunctional hindered phenol antioxidant (AO) series at the perovskite/electron transport layer interface. The AO molecule serves a dual function by chemically passivating uncoordinated Pb²⁺ defects through coordinate bonding while also neutralizing ROS. Its bulky tert-butyl groups further create a hydrophobic barrier and provide steric hindrance which further enhance resistance to moisture-induced degradation. This physical barrier not only protects the perovskite from moisture and ROS, but also successfully suppresses interfacial ion migration and trap-assisted non-radiative recombination. By resolving these fundamental electrical and chemical issues, the AO-modified PSCs achieve higher short-circuit current density of 27.1 mA/cm² and achieve a champion power conversion efficiency (PCE) of 19.3%. In addition, the minimized hysteresis demonstrates that the PCE remains consistent regardless of the voltage scan direction, ensuring stable charge extraction[3] . As a result, this work provides a simple and highly effective strategy for developing efficient and stable perovskite photovoltaics.
