Improved Ga grading of sequentially produced Cu(In,Ga)Se2 solar cells studied by high resolution X-ray fluorescence
Improved Ga grading of sequentially produced Cu(In,Ga)Se2 solar cells studied by high resolution X-ray fluorescence
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通过高分辨率 X 射线荧光研究连续生产的 Cu(In,Ga)Se2 太阳能电池的 Ga 分级得到改善
DOI：
10.1063/1.4905347
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发表时间：
2015
影响因子：
4
通讯作者：
C. Ronning
中科院分区：
文献类型：
--
作者：
Philipp Schöppe;C. Schnohr;M. Oertel;Alexander Kusch;A. Johannes;S. Eckner;M. Burghammer;G. Martínez;U. Reislöhner;C. Ronning
对Cu(In,Ga)Se2太阳能电池吸收剂的成分不均匀性进行了研究。我们介绍了一种用高度聚焦的同步x射线束扫描聚焦离子束制备的完整太阳能电池器件薄层的方法。分析产生的荧光辐射确保高分辨率的成分分析结合高空间分辨率。因此，我们能够在亚微米尺度上检测到Ga/(Ga + In)比低至0.01的细微变化。我们观察到，对于顺序加工的太阳能电池，较高的硒化温度导致吸收体具有几乎均匀的Ga/(Ga + In)比，显著提高了转换效率。
There is particular interest to investigate compositional inhomogeneity of Cu(In,Ga)Se2 solar cell absorbers. We introduce an approach in which focused ion beam prepared thin lamellas of complete solar cell devices are scanned with a highly focused synchrotron X-ray beam. Analyzing the resulting fluorescence radiation ensures high resolution compositional analysis combined with high spatial resolution. Thus, we are able to detect subtle variations of the Ga/(Ga + In) ratio down to 0.01 on a submicrometer scale. We observed that for sequentially processed solar cells a higher selenization temperature leads to absorbers with almost homogenous Ga/(Ga + In) ratio, which significantly improved the conversion efficiency.