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주임교수 인사말 학과소개 연혁 비전 및 진로 학과를 위한 기부 PCE 어울림 소식지 홍보자료 찾아오시는길
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    화공과 궁금하니? PCE졸업생 인터뷰 우리들의 활동 PCE 스튜디오 너화아
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    미래를 창조하는 포스텍 화학공학과

    Enhanced Efficiency and Stability of an Aqueous Lead-Nitrate-Based Organometallic Perovskite Solar Cell

    Title of paper
    Enhanced Efficiency and Stability of an Aqueous Lead-Nitrate-Based Organometallic Perovskite Solar Cell
    Author
    [박태호교수 연구실]
    Publication in journal
    ACS Applied Matererial and Interfaces 9, pp14023-14030.
    Publication date
    20170331
     
    [abstract]
    We investigate the stability of an active organometallic perovskite layer prepared from a two-step solution procedure, including spin coating of aqueous lead nitrate (Pb(NO3)2) as a Pb2+ source and
    sequential dipping into a methylammonium iodide (CH3NH3I) solution. The conversion of CH3NH3PbI3 from a uniform Pb(NO3)2 layer generates PbI2-free and large-grain perovskite crystallites owing to an intermediate ionexchange reaction step, resulting in improved humidity resistance and, thereby, improved long-term stability with 93% of the initial power conversion efficiency (PCE) after a period of 20 days. The conventional fast-converted PbI2-dimethylformamide solution system leaves small amounts of intrinsic PbI2 residue on the resulting perovskite and MAPbI3 crystallites with uncontrollable sizes. This accelerates the generation of PbI2 and the decomposition of the perovskite layer, resulting in poor stability with less than 60% of the initial PCE after a period of 20 days.
     
    DOI: 10.1021/acsami.7b01864