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- W4284667767 abstract "Abstract Water ingress is one of the major environmental stresses to cause the degradation of device performance in organic photovoltaic (OPVs) and is one of the major barriers impeding their commercialization. This work demonstrates that combining the use of a nanoparticle titanium dioxide (np‐TiO 2 ) electron transporting layer (ETL) and an all‐polymer bulk heterojunction (BHJ) photoactive layer can endow the derived OPV with a much better water resistivity than the commonly employed zinc oxide (ZnO) ETL or polymer:small molecule BHJ blends. Polymer donors/acceptors are first shown to possess better water‐immersion than the small molecule counterparts. Hence, the all‐polymer blend exhibits the lowest absorbance losses after water immersion among the studied BHJ systems. Furthermore, the result reveals that tailoring the structure of the TiO 2 ETL from planar to nanoparticles effectively strengthens the adhesion at the ETL/BHJ interface to prevent physical delamination. Finally, the np‐TiO 2 /all‐polymer blend (half‐cell) is demonstrated to have superior stability under water immersion, i.e., unchanged morphology and charge carrier transfer, as well as no efficiency changes in the complete cells. This work demonstrates the great potential of the all‐polymer blends and np‐TiO 2 ETL for improving the durability of unencapsulated OPVs under high humidity environments and even water immersion." @default.
- W4284667767 created "2022-07-08" @default.
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- W4284667767 date "2022-07-05" @default.
- W4284667767 modified "2023-09-26" @default.
- W4284667767 title "Water‐Insensitive Electron Transport and Photoactive Layers for Improved Underwater Stability of Organic Photovoltaics" @default.
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- W4284667767 doi "https://doi.org/10.1002/adfm.202203487" @default.
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