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首页> 外文期刊>Advanced energy materials >Thin Film Co3O4/TiO2 Heterojunction Solar Cells
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Thin Film Co3O4/TiO2 Heterojunction Solar Cells

机译：薄膜Co3O4 / TiO2异质结太阳能电池

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摘要

Co3O4 is investigated as a light absorber for all-oxide thin-film photovoltaic cells because of its nearly ideal optical bandgap of around 1.5 eV. Thin film TiO2/Co3O4 heterojunctions are produced by spray pyrolysis of TiO2 as a window layer, followed by pulsed laser deposition of Co3O4 as a light absorbing layer. The photovoltaic performance is investigated as a function of the Co3O4 deposition temperature and a direct correlation is found. The deposition temperature seems to affect both the crystallinity and the morphology of the absorber, which affects device performance. A maximum power of 22.7 μW cm−2 is obtained at the highest deposition temperature (600°C) with an open circuit photovoltage of 430 mV and a short circuit photocurrent density of 0.2 mA cm−2. Performing deposition at 600°C instead of room temperature improves power by an order of magnitude and reduces the tail states (Urbach edge energy). These phenomena can be explained by larger grains that grows at high temperature, as opposed to many nucleation events that occur at lower temperature.
机译：Co3O4因其接近1.5 eV的理想光学带隙而被研究用作全氧化物薄膜光伏电池的光吸收剂。薄膜TiO2 / Co3O4异质结是通过将TiO2作为窗口层进行喷雾热解，然后脉冲激光沉积Co3O4作为光吸收层而制得的。研究了光伏性能与Co3O4沉积温度的关系，并发现了直接相关性。沉积温度似乎会影响吸收体的结晶度和形态，从而影响器件性能。在最高沉积温度（600℃）下，在430 mV的开路光电压和0.2 mA cm-2的短路光电流密度下，可获得22.7μWcm-2的最大功率。在600°C而非室温下进行沉积，可将功率提高一个数量级，并减少尾态（Urbach边缘能）。这些现象可以用在高温下生长的较大晶粒来解释，这与在较低温度下发生的许多成核现象相反。

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  • 来源
    《Advanced energy materials》 |2015年第1期|1-5|共5页
  • 作者

    Benjamin Kupfer; Koushik Majhi; David A. Keller; Yaniv Bouhadana; Sven RÜhle; Hannah Noa Barad; Assaf Y. Anderson; Arie Zaban;

  • 作者单位

    Department of Chemistry Center for Nanotechnology Adv. Mater. Bar Ilan University Ramat Gan Israel;

    Department of Chemistry Center for Nanotechnology Adv. Mater. Bar Ilan University Ramat Gan Israel;

    Department of Chemistry Center for Nanotechnology Adv. Mater. Bar Ilan University Ramat Gan Israel;

    Department of Chemistry Center for Nanotechnology Adv. Mater. Bar Ilan University Ramat Gan Israel;

    Department of Chemistry Center for Nanotechnology Adv. Mater. Bar Ilan University Ramat Gan Israel;

    Department of Chemistry Center for Nanotechnology Adv. Mater. Bar Ilan University Ramat Gan Israel;

    Department of Chemistry Center for Nanotechnology Adv. Mater. Bar Ilan University Ramat Gan Israel;

    Department of Chemistry Center for Nanotechnology Adv. Mater. Bar Ilan University Ramat Gan Israel;

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  • 正文语种 eng
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  • 关键词

    all-oxide photovoltaic cells; cobalt oxide; solar cells; combinatorial materials science; titania;

    机译：全氧化物光伏电池;氧化钴;太阳能电池;组合材料科学;二氧化钛;

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