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Efficient solar fuel production enabled by an iodide oxidation reaction on atomic layer deposited MoS_(2)

Carbon Energy 2023年第12期5卷 200-214页

作者： Young Sun Park Gyumin Jang Inkyu Sohn Hyungsoo Lee Jeiwan Tan Juwon Yun sunihl ma Jeongyoub Lee Chan Uk Lee Subin Moon Hayoung Im Seung-Min Chung Seungho Yu Hyungjun Kim Jooho Moon Department of materials Science and Engineering Yonsei UniversitySeoulRepublic of Korea School of Electrical and Electronic Engineering Yonsei UniversitySeoulRepublic of Korea Energy Storage Research Center Korea Institute of Science and TechnologySeoulRepublic of Korea

Oxygen evolution reaction(OER)as a half-anodic reaction of water splitting hinders the overall reaction efficiency owing to its thermodynamic and kinetic *** oxidation reaction(IOR)with low thermodynamic barrier and rapid reaction kinetics is a promising alternative to the ***,we present a molybdenum disulfide(MoS_(2))electrocatalyst for a high-efficiency and remarkably durable anode enabling ***_(2)nanosheets deposited on a porous carbon paper via atomic layer deposition show an IOR current density of 10 ma cm^(–2)at an anodic potential of 0.63 V with respect to the reversible hydrogen electrode owing to the porous substrate as well as the intrinsic iodide oxidation capability of MoS_(2)as confirmed by theoretical *** lower positive potential applied to the MoS_(2)-based heterostructure during IOR electrocatalysis prevents deterioration of the active sites on MoS_(2),resulting in exceptional durability of 200 ***,we fabricate a two-electrode system comprising a MoS_(2)anode for IOR combined with a commercial Pt@C catalyst cathode for hydrogen evolution ***,the photovoltaic–electrochemical hydrogen production device comprising this electrolyzer and a single perovskite photovoltaic cell shows a record-high current density of 21 ma cm^(–2)at 1 sun under unbiased conditions.

关键词： iodide oxidation reaction molybdenum sulfide photovoltaic-electrochemical hydrogen production solar hydrogen

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Rapid crystallization-driven high-efficiency phase-pure deep-blue Ruddlesden–Popper perovskite light-emitting diodes

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Advanced Photonics 2023年第1期5卷 8-18页

作者： Gyumin Jang Hyowon Han sunihl ma Junwoo Lee Chan Uk Lee Wooyong Jeong Jaehyun Son Dongki Cho Ji-Hee Kim Cheolmin Park Jooho Moon Yonsei University Department of Materials Science and EngineeringSeoulRepublic of Korea Sungkyunkwan University Department of Energy ScienceSuwonRepublic of Korea Institute for Basic Science Center for Integrated Nanostructure PhysicsSuwonRepublic of Korea

Perovskite light-emitting diodes(PeLEDs)are considered as promising candidates for nextgeneration solution-processed full-color ***,the external quantum efficiencies(EQEs)and operational stabilities of deep-blue(3 is hampered completely,so that phase-pure 2D-RPP films with bandgaps suitable for deep-blue PeLEDs can be obtained *** uniquely developed rapid crystallization method also enables formation of randomly oriented 2D-RPP crystals,thereby improving the transfer and transport kinetics of the charge ***,high-performance deep-blue PeLEDs emitting at 437 nm with a peak EQE of 0.63%are successfully *** color coordinates are confirmed to be(0.165,0.044),which match well with the Rec.2020 standard blue gamut and have excellent spectral stability.

关键词： Ruddlesden–Popper perovskite rapid crystallization deep-blue light-emitting diodes phase purity randomly oriented crystals

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