Multifunctional AO‐245 Antioxidant Enables UV‐Resistant and High‐Efficient Perovskite Solar Cells
Year: 2026
Type: article
Abstract: ABSTRACT Ultraviolet (UV) radiation greatly affects the stability of perovskite solar cells (PSCs), limiting their application in extreme environments such as plateaus and deserts. Herein, the antioxidant [triethylene glycol bis (3‐tert‐butyl‐4‐hydroxy‐5‐methylphenyl) propionate] (AO‐245) is introduced into the perovskite layer by anti‐solvent method to improve the UV stability. AO‐245 not only demonstrates UV absorption properties but also neutralizes harmful superoxide radicals () through a hydrogen atom transfer mechanism (HAT), thereby mitigating the photodegradation damage of perovskite. Additionally, the −OH group in AO‐245 can form hydrogen bonds with I − , inhibit the migration of iodide ions due to photoaging, and synergistically enhance the UV stability of the device. As a result, even after 120 h of exposure to UV light at 275 and 365 nm, the AO‐245‐modified PSCs retain more than 88% and 83% of their initial power conversion efficiency (PCE), respectively. AO‐245 additive passivates the uncoordinated Pb 2+ through C═O and C─O bonds, thereby enhancing the film's quality and the device's stability. Consequently, the device achieves a PCE of 19.76%, which is among the highest efficiencies observed hole transport material (HTM)‐free carbon‐based PSCs (C‐PSCs). This study provides a simple solution to improve the durability of PSCs under UV radiation, facilitating their application in extreme environments.
Source: Small
Institutions: Guangxi University, Southeast University, Chongqing University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W7124244002