Work

Enhancing Mechanical Stability and Performance of Perovskite Solar Modules With MXene Interface Adhesives

Year: 2025

Type: article

Abstract: Perovskite solar modules feature inherently soft interfacial mechanical properties, making them more prone to failure than silicon‐based devices. The lattice mismatch between perovskite absorbers and π‐conjugated hole transport materials (HTMs) severely weakens adhesion and stability but remains insufficiently studied. Here, iodide‐capped Ti 3 C 2 T x MXene is synthesized and employed as a “bone‐joint” interfacial modulator to bridge perovskite and a π‐conjugated phthalocyanine HTM. Iodide terminals coordinate strongly with surface Pb 2 ⁺ ions, while the π‐conjugated basal plane forms π–π interactions with phthalocyanine, creating dual binding that enhances adhesion and relieves residual stress. Mechanical tests—including free‐fall impact, tape peeling, and bending—confirm substantially improved robustness. This dual interaction also optimizes energy‐level alignment at the perovskite/phthalocyanine interface, while the incorporation of conductive Ti 3 C 2 T x at the HTM/electrode interface enhances charge extraction, enabling the perovskite module with an active area of 21.54 cm 2 to achieve an efficiency of 22.51%—among the highest reported for such systems. This work demonstrates an effective interfacial strategy for enhancing both mechanical stability and performance, advancing the practical application of perovskite photovoltaics.

Source: Small Methods

DOI: 10.1002/smtd.202501696