Toughened Hybrid Electron-Transporting Interlayers for Efficient and Durable Organic Solar Cells.

Authors

Lingchen Kong, Baobing Fan, Qian Li, Xiaofeng Huang, Ming Liu, Huanhuan Gao, Lingzhi Guo, Tianqi Chen, Bin Kan, Yanming Sun, Alex K-Y Jen

Published in

Advanced materials (Deerfield Beach, Fla.). Pages e74415. Aug 03, 2026. Epub Aug 03, 2026.

Abstract

Electron-transporting layers (ETLs) are crucial in determining the performance of organic solar cells (OSCs). However, it is challenging to achieve desired efficiency and stability simultaneously for devices based on single-component ETLs. Here, we demonstrate the application of polyoxometalate (POM)-doped hybrid ETLs to achieve significantly mitigated efficiency-stability trade-off in OSCs. By tailoring the doping behaviors, hybrid ETLs exhibit cascade energy-level alignment, increased conductivity, improved electrode adhesion, strong thickness tolerance, and suppressed self-aggregation. These combined merits enable excellent efficiency (20.4%) and outstanding stability (a T₉₃/T₉₂ lifetime of 1500/1000 h under MPP tracking at 40°C/65°C) to be achieved for OSCs. A further elevated efficiency of 20.8% (20.4%, certified) and a T₉₀ lifetime of 1000 h can also be achieved when PDIN-EME is used as the new organic component in the hybrid ETL, demonstrating the easy tunability of these hybrid interlayers for more efficient and robust OSCs.

PMID:
42545822
Bibliographic data and abstract were imported from PubMed on 04 Aug 2026.

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