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A facile process to prepare copper oxide thin films as solar selective absorbers

机译：制备氧化铜薄膜作为太阳能选择性吸收剂的简便方法

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摘要

Copper oxide thin films as solar selective absorbers were conveniently prepared by one-step chemical conversion method. X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-vis-NIR spectra and Fourier transform infrared (FTIR) spectra were employed to characterize the composition, structure and optical properties of thin films. The results indicated that the composition, structure and optical properties of thin films were greatly influenced by reaction temperature, time and concentration of NaOH. When reaction temperature was fixed at 40 °C, the as-prepared films consist of pure cubic CU2O. The surface morphology of thin films was changed from square-like structure (reaction times25min) to porous belt-like structure (reaction time > 30 min) with the elongation of reaction time. While for thin films prepared at 60°C and 80^, single Cu_2O was observed after 5 min reaction. When reaction time is longer than 5 min, CuO appears and the content of CuO is increasing with the elongation of reaction time. With the increase of reaction temperature, the belt-like structure was easily formed for 60°C/10min and 80 °C/5 min. Decreasing concentration of NaOH also could result in the formation of CuO and porous belt-like structure. Simultaneously, the film thickness is increasing with the increase of reaction time, temperature and concentration. Films containing CuO with belt-like structure exhibited high absorptance (>0.9), and the emissivity of films increased with elongation of reaction time. Combination of the composition, structure and optical properties, it can be deduced that the porous belt-like structure like as a light trap can greatly enhance absorbance (a), while the composition, thickness and roughness of thin films can greatly influence the emissivity (e). The highest photo-thermal conversion efficiency was up to 0.86 (
机译：通过一步化学转化法方便地制备了作为太阳能选择性吸收剂的氧化铜薄膜。利用X射线衍射（XRD），扫描电子显微镜（SEM），UV-vis-NIR光谱和傅立叶变换红外光谱（FTIR）来表征薄膜的组成，结构和光学性质。结果表明，薄膜的组成，结构和光学性质受反应温度，时间和NaOH浓度的影响很大。当反应温度固定在40°C时，所制备的薄膜由纯立方CU2O组成。随着反应时间的延长，薄膜的表面形貌由方形结构（反应时间25min）变为多孔带状结构（反应时间> 30min）。对于在60℃和80℃下制备的薄膜，反应5分钟后观察到单一的Cu_2O。当反应时间超过5分钟时，CuO出现并且CuO的含量随着反应时间的延长而增加。随着反应温度的升高，在60℃/ 10min和80℃/ 5min时容易形成带状结构。降低NaOH的浓度也可能导致形成CuO和多孔带状结构。同时，膜厚度随着反应时间，温度和浓度的增加而增加。含有带状结构的CuO的薄膜显示出高吸收率（> 0.9），并且随着反应时间的延长，薄膜的发射率增加。结合组成，结构和光学性能，可以推断出像光阱一样的多孔带状结构可以大大提高吸光度（a），而薄膜的组成，厚度和粗糙度可以极大地影响发射率（ e）。对于在80°C / 5min制备的薄膜，最高的光热转换效率高达0.86（

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  • 来源
    《Applied Surface Science》 |2011年第24期|p.10729-10736|共8页
  • 作者

    XiudiXiao; LeiMiao; GangXu; Limei Lu; ZhanminSu; NingWang; SakaeTanemura;

  • 作者单位

    Key Laboratory of Renewable Energy and Gas Hydrates, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China,Key Laboratory of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, PR China;

    Key Laboratory of Renewable Energy and Gas Hydrates, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China;

    Key Laboratory of Renewable Energy and Gas Hydrates, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China;

    South China University of Technology, Guangzhou 510640, PR China;

    South China University of Technology, Guangzhou 510640, PR China;

    State Key Lab of Electronic Thin Films & Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China;

    Key Laboratory of Renewable Energy and Gas Hydrates, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China,Nanostructures Research Laboratory, Japan Fine Ceramics Center, Nagoya 456-8587, Japan;

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  • 正文语种 eng
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  • 关键词

    copper oxide solar selective absorber absorbance emissivity;

    机译：氧化铜太阳选择性吸收剂吸收率;

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