Anion-Induced Catalytic Reaction in a Solution-Processed Molybdenum Oxide for Efficient Inverted Ternary Organic Photovoltaics

Taeyoon Ki; Changhoon Lee; Jehan KimIn-Wook HwangChang-Mok OhKiyoung ParkSanseong LeeJu-Hyeon KimChandran BalamuruganJaemin KongHyeon-Seok JeongSooncheol KwonKwanghee Lee

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Anion-Induced Catalytic Reaction in a Solution-Processed Molybdenum Oxide for Efficient Inverted Ternary Organic Photovoltaics

机译：Anion-Induced Catalytic Reaction in a Solution-Processed Molybdenum Oxide for Efficient Inverted Ternary Organic Photovoltaics

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Solution-processed transition metal oxides (TMOs) prepared from complexion precursors are developed as promising scalable interfacial layers fornon-fullerene organic photovoltaics (OPVs); however, challenges remain inachieving defect-free and highly oriented metal-oxygen networks withoutpost-deposition treatments due to the presence of residual organic metalbindingligands in films. Herein, the novel strategy that the problematicorganic metal-binding ligands in TMO precursors can be successfully eliminatedby an anion-induced catalytic reaction (ACR) at room temperature isdemonstrated, in which the low-level anions induce electron redistributionand instability of TMO precursors, expediting binding ligand removal duringthe hydrolysis reaction. The subsequent condensation process facilitates adimensionally confined and continuous metal-oxygen network with a 20-foldincrease in electrical conductivity (from 8.4 × 10~(?4) to 1.8 × 10~(?2) S m~(?1)) andsuperior work function tunability (from 5.1 to 5.3 eV) compared to the pristinefilm. The ACR-derived TMO thin film on top of a ternary PBDB-TF:Y6:PC71BMphotoactive layer enables an inverted device configuration with improved efficiencyof 17.6%, as well as enhanced stability over 70% of the initial efficiencyfor up to 100 h AM 1.5G illumination.

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《Advanced functional materials》 |2022年第35期|2204493.1-2204493.10|共10页
作者
Taeyoon Ki; Changhoon Lee; Jehan KimIn-Wook HwangChang-Mok OhKiyoung ParkSanseong LeeJu-Hyeon KimChandran BalamuruganJaemin KongHyeon-Seok JeongSooncheol KwonKwanghee Lee;
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Heeger Center for Advanced Materials (HCAM)Gwangju Institute of Science and TechnologyGwangju 61005, Republic of Korea School of Materials Science and EngineeringGwangju Institute of Science and TechnologyGwangju 61005, Republic of Korea Research Institut;

Heeger Center for Advanced Materials (HCAM)Gwangju Institute of Science and TechnologyGwangju 61005, Republic of Korea School of Materials Science and EngineeringGwangju Institute of Science and TechnologyGwangju 61005, Republic of Korea;

Max Planck POSTECH Center for Complex Phase of MaterialsPohang University of Science and TechnologyPohang 37673, Republic of KoreaPohang Accelerator Laboratory (PAL)Pohang University of Science and TechnologyPohang 37673, Republic of KoreaAdvanced Photonics Research Institute (APRI)Gwangju Institute of Science and TechnologyGwangju 61005, Republic of KoreaHeeger Center for Advanced Materials (HCAM)Gwangju Institute of Science and TechnologyGwangju 61005, Republic of Korea Department of Energy and Materials EngineeringDongguk University-SeoulSeoul 04620, Republic of KoreaResearch Institute for Solar and Sustainable Energies (RISE)Gwangju Institute of Science and TechnologyGwangju 61005, Republic of KoreaDepartment of Energy and Materials EngineeringDongguk University-SeoulSeoul 04620, Republic of Korea;

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正文语种英语
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anion catalyses; charge transport layers; metal oxides; molybdenum oxides; polymer solar cells; room temperature sol-gel process;

Anion-Induced Catalytic Reaction in a Solution-Processed Molybdenum Oxide for Efficient Inverted Ternary Organic Photovoltaics

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