Highly Robust Anode Interlayer for Water-Proof and Stretchable Organic Solar Cells

• • PTN-POM anode interlayer achieves a PCE of 19.59% in binary OSCs, the highest for cross-linked AILs, demonstrating superior photovoltaic performance. • • PTN-POM films exhibit electrical conductivity of 3.30×10−3 S/m and high stretchability, outperforming PEDOT:PSS in mechanical strength, enabling robust flexible devices. • • Water-proof OSCs with PTN-POM show no performance degradation after 42 days underwater, indicating exceptional environmental stability for wearable applications. • • Stretchable OSCs with PTN-POM retain 81% of initial PCE under 50% tensile strain, proving mechanical robustness critical for wearable integration.