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首页> 外文期刊>Advanced Functional Materials >A Facile Preparative Route of Nanoscale Perovskites over Mesoporous Metal Oxide Films and Their Applications to Photosensitizers and Light Emitters
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A Facile Preparative Route of Nanoscale Perovskites over Mesoporous Metal Oxide Films and Their Applications to Photosensitizers and Light Emitters

机译：介孔金属氧化物薄膜上纳米钙钛矿的简便制备路线及其在光敏剂和发光剂中的应用

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摘要

By two-step sequential Pb2+ adsorption and reaction with methylammonium-iodide (MAI) or -bromide (MABr) at a low concentration level of 0.06-0.10 m over mesoporous TiO2 or ZrO2 film, a well-defined nanoscale CH3NH3PbI3 (MAPbI(3)) photosensitizer or CH3NH3PbBr3 (MAPbBr(3)) light emitter could be prepared in situ, respectively in a reproducible and atom-economical way. The as-prepared nanoscale perovskites are compared with their thin film counterparts in terms of light absorption/emission, crystallinity, surface morphology, and energy-conversion efficiency. The nanoscale perovskite-decorated films display more transparency than the bulky film due to the much lower amount deposited, while blueshifted and overwhelmingly brighter photoluminescence is observed in the nano relative to the bulk due to quantum size confinement. Transmission electron microscopy images also clearly show that a few nanometer-sized perovskite dots are deposited homogeneously over the surface of TiO2- or ZrO2-particulate film in the course of the current preparative route. When the nano-MAPbI(3) is tested as a photosensitizer in a solid-state dye-sensitized solar cell configuration with a very thin (approximate to 650 nm) TiO2 mesoporous film, it has a promising initial power conversion efficiency of 6.23%, which outperformed the result of 2.28% from a typical organic molecular dye coded as MK-2.
机译：通过两步连续的Pb2 +吸附并与中孔TiO2或ZrO2膜上低浓度水平为0.06-0.10 m的甲基碘化碘（MAI）或溴化甲烷（MABr）反应，形成了定义明确的纳米级CH3NH3PbI3（MAPbI（3） ）光敏剂或CH3NH3PbBr3（MAPbBr（3））发光体可分别以可重现和原子经济的方式原位制备。将所制备的纳米钙钛矿与它们的薄膜钙钛矿在吸光/发射，结晶度，表面形态和能量转换效率方面进行了比较。纳米钙钛矿装饰膜由于体积要低得多，因此比膨体膜具有更高的透明度，而由于量子尺寸的限制，相对于本体，纳米级观察到的是蓝移且压倒性更亮的光致发光。透射电子显微镜图像还清楚地表明，在当前的制备路线中，一些纳米尺寸的钙钛矿点均匀地沉积在TiO2-或ZrO2-微粒膜的表面上。当nano-MAPbI（3）在具有非常薄的TiO2介孔膜的固态染料敏化太阳能电池配置中作为光敏剂进行测试时，其初始功率转换效率有望达到6.23％，该结果优于编码为MK-2的典型有机分子染料的2.28％的结果。

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  • 来源
    《Advanced Functional Materials》 |2018年第39期|1803801.1-1803801.9|共9页
  • 作者

    Lee Hyo Joong; Cho Kyung Taek; Paek Sanghyun; Lee Yonghui; Huckaba Aron J.; Queloz Valentin I. E.; Zimmermann Iwan; Grancini Giulia; Oveisi Emad; Yoo So-Min; Lee Seul-Yi; Shin Taeho; Kim Myoung; Nazeeruddin Mohammad Khaja;

  • 作者单位

    Chonbuk Natl Univ, Dept Chem, Jeonju 561756, South Korea;

    EPFL VALAIS, Inst Chem Sci & Engn, Grp Mol Engn Funct Mat, CH-1951 Sion, Switzerland;

    EPFL VALAIS, Inst Chem Sci & Engn, Grp Mol Engn Funct Mat, CH-1951 Sion, Switzerland;

    EPFL VALAIS, Inst Chem Sci & Engn, Grp Mol Engn Funct Mat, CH-1951 Sion, Switzerland;

    EPFL VALAIS, Inst Chem Sci & Engn, Grp Mol Engn Funct Mat, CH-1951 Sion, Switzerland;

    EPFL VALAIS, Inst Chem Sci & Engn, Grp Mol Engn Funct Mat, CH-1951 Sion, Switzerland;

    EPFL VALAIS, Inst Chem Sci & Engn, Grp Mol Engn Funct Mat, CH-1951 Sion, Switzerland;

    EPFL VALAIS, Inst Chem Sci & Engn, Grp Mol Engn Funct Mat, CH-1951 Sion, Switzerland;

    Ecole Polytech Fed Lausanne, Interdisciplinary Ctr Electron Microscopy, CH-1015 Lausanne, Switzerland;

    Chonbuk Natl Univ, Dept Chem, Jeonju 561756, South Korea;

    Chonbuk Natl Univ, Dept Chem, Jeonju 561756, South Korea;

    Chonbuk Natl Univ, Dept Chem, Jeonju 561756, South Korea;

    Chonbuk Natl Univ, Dept Chem, Jeonju 561756, South Korea;

    EPFL VALAIS, Inst Chem Sci & Engn, Grp Mol Engn Funct Mat, CH-1951 Sion, Switzerland;

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  • 关键词

    dye-sensitized solar cells; light emitters; nanoscale perovskites; sensitizers;

    机译：染料敏化太阳能电池;发光体;纳米钙钛矿;敏化剂;

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