Water-Insensitive Electron Transport and Photoactive Layers for Improved Underwater Stability of Organic Photovoltaics

Chieh-Ting Lin; Cheng-Tien Hsieh; Thomas J. MacdonaldJia-Fu ChangPo-Chen LinHyojung ChaLudmilla SteierAndrew WadsworthIain McCullochChu-Chen ChuehJames R Durrant

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Water-Insensitive Electron Transport and Photoactive Layers for Improved Underwater Stability of Organic Photovoltaics

机译：Water-Insensitive Electron Transport and Photoactive Layers for Improved Underwater Stability of Organic Photovoltaics

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Water ingress is one of the major environmental stresses to cause thedegradation of device performance in organic photovoltaic (OPVs) andis one of the major barriers impeding their commercialization. This workdemonstrates 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 muchbetter water resistivity than the commonly employed zinc oxide (ZnO) ETLor polymer:small molecule BHJ blends. Polymer donors/acceptors are firstshown to possess better water-immersion than the small molecule counterparts.Hence, the all-polymer blend exhibits the lowest absorbance lossesafter water immersion among the studied BHJ systems. Furthermore, theresult reveals that tailoring the structure of the TiO2 ETL from planar tonanoparticles effectively strengthens the adhesion at the ETL/BHJ interfaceto prevent physical delamination. Finally, the np-TiO2/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 noefficiency changes in the complete cells. This work demonstrates the greatpotential of the all-polymer blends and np-TiO_2 ETL for improving the durabilityof unencapsulated OPVs under high humidity environments and evenwater immersion.

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来源
《Advanced functional materials》 |2022年第40期|2203487.1-2203487.11|共11页
作者
Chieh-Ting Lin; Cheng-Tien Hsieh; Thomas J. MacdonaldJia-Fu ChangPo-Chen LinHyojung ChaLudmilla SteierAndrew WadsworthIain McCullochChu-Chen ChuehJames R Durrant;
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Department of Chemistry and Centre for Processable ElectronicsImperial College LondonLondon SW7 2AZ, UK Department of Chemical EngineeringNational Chung Hsing UniversityTaichung 40227, Taiwan;

Department of Chemical EngineeringNational Taiwan UniversityTaipei 10617, Taiwan;

Department of Chemistry and Centre for Processable ElectronicsImperial College LondonLondon SW7 2AZ, UK School of Engineering and Materials ScienceQueen Mary University of LondonLondon E1 4NS, UKDepartment of Chemistry and Centre for Processable ElectronicsImperial College LondonLondon SW7 2AZ, UK Department of Hydrogen & Renewable EnergyKyungpook National UniversityDaegu 41566, KoreaDepartment of ChemistryUniversity of OxfordOxford OX1 4BH, UKDepartment of Chemistry and Centre for Processable ElectronicsImperial College LondonLondon SW7 2AZ, UK SPECIFIC IKCCollege of EngineeringSwansea UniversitySwansea SA2 7AX, UK;

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正文语种英语
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all-polymer solar cells; electron transport layers; nanoparticle TiO_2; organic photovoltaics; underwater stability;

Water-Insensitive Electron Transport and Photoactive Layers for Improved Underwater Stability of Organic Photovoltaics

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