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首页> 外文期刊>RSC Advances >Raman scattering quantitative assessment of the anion composition ratio in Zn(O,S) layers for Cd-free chalcogenide-based solar cells
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Raman scattering quantitative assessment of the anion composition ratio in Zn(O,S) layers for Cd-free chalcogenide-based solar cells

机译：拉曼散射对基于氯化物的无氯化物基太阳能电池的Zn（O，S）层的阴离子组成比的定量评估

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摘要

This work reports the use of Raman scattering for the chemical characterization of Zn(O,S) layers that are being developed as a Cd-free alternative for the buffer layer in advanced chalcogenide solar cells. The nanometric thickness of these layers requests the use of resonant excitation conditions, which are strongly sensitive to the alloy composition. In this study Raman spectra were measured with different excitation wavelengths (325 nm, 532 nm) on a set of reference samples with chemical compositions covering the whole range from stoichiometric ZnS to stoichiometric ZnO. The results show the existence of a strong linear dependence of the frequency of the ZnO-like peak on the alloy composition, which provides a simple methodology for the quantitative assessment of the chemical composition in almost all the composition region. In the case of samples with a S-rich composition (0.5 <= S/(S + O) <= 1), the analysis of the relative intensity of the ZnS like peak allows for a complementary assessment of the S/(S + O) content ratio. The characterization of layers grown under conditions similar to those used for the fabrication of chalcogenide solar cells has allowed the demonstration of the viability of the proposed methodology for the non-destructive chemical assessment of these advanced buffer layers.
机译：该工作报告使用Raman散射用于Zn（O，S）层的化学表征，该层被开发为在高级硫属化物太阳能电池中的缓冲层的无镭替代方案。这些层的纳米厚度请求使用谐振激发条件，这对合金组合物非常敏感。在该研究中，用不同的激发波长（325nm，532nm）在一组参考样品上测量拉曼光谱，所述参考样品具有覆盖从化学计量Zns的整个范围到化学计量ZnO的化学组合物。结果表明，存在于合金组合物上ZnO样峰的频率的强线性依赖性，其为几乎所有组成区中的化学组成的定量评估提供了简单的方法。在具有富含S的组合物的样品（0.5 <= S /（S + O）<= 1）的情况下，ZnS的相对强度的分析如峰值允许对S /（S +的互补评估o）内容比。在类似于用于制备硫属化物太阳能电池的条件下生长的层的表征已经允许证明所提出的方法的可行性对于这些晚期缓冲层的非破坏性化学评估。

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  • 来源
    《RSC Advances》 |2016年第29期|共7页
  • 作者

    Guc M.; Neuschitzer M.; Hariskos D.; Bauer A.; Witte W.; Hempel W.; Calvo-Barrio L.; Pistor P.; Perez-Rodriguez A.; Izquierdo-Roca V.;

  • 作者单位

    Catalonia Inst Energy Res IREC Jardins Danes de Negre 1 Barcelona 08930 Spain;

    Catalonia Inst Energy Res IREC Jardins Danes de Negre 1 Barcelona 08930 Spain;

    Zentrum Sonnenenergie &

    Wasserstoff Forsch Baden Stuttgart Germany;

    Zentrum Sonnenenergie &

    Wasserstoff Forsch Baden Stuttgart Germany;

    Zentrum Sonnenenergie &

    Wasserstoff Forsch Baden Stuttgart Germany;

    Zentrum Sonnenenergie &

    Wasserstoff Forsch Baden Stuttgart Germany;

    Univ Barcelona Ctr Cient &

    Tecnol CCiTUB C Lluis Sole &

    Sabares 1 E-08028 Barcelona Spain;

    Catalonia Inst Energy Res IREC Jardins Danes de Negre 1 Barcelona 08930 Spain;

    Catalonia Inst Energy Res IREC Jardins Danes de Negre 1 Barcelona 08930 Spain;

    Catalonia Inst Energy Res IREC Jardins Danes de Negre 1 Barcelona 08930 Spain;

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  • 正文语种 eng
  • 中图分类 化学;
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