Max-Planck-Institut für Eisenforschung, Max-Planck-Straße 1, 40237 Düsseldorf, Germany.
Ultramicroscopy. 2011 May;111(6):552-6. doi: 10.1016/j.ultramic.2010.12.034. Epub 2011 Jan 11.
Atom Probe Tomography was employed to investigate the distribution of impurities, in particular sodium and oxygen, in a CuInSe(2)-based thin-film solar cell. It could be shown that sodium, oxygen, and silicon diffuse from the soda lime glass substrate into the CuInSe(2) film and accumulate at the grain boundaries. Highly dilute concentrations of sodium and oxygen were measured in the bulk. Selenium was found to be depleted at the grain boundaries. These observations could be confirmed by complementary energy dispersive X-ray spectroscopy studies. Our results support the model proposed by Kronik et al. (1998) [1], which explains the enhanced photovoltaic efficiency of sodium containing CuInSe(2) solar cells by the passivation of selenium vacancies at grain boundaries.
原子探针层析技术被用于研究杂质（特别是钠和氧）在铜铟硒（CuInSe₂）基薄膜太阳能电池中的分布。结果表明，钠、氧和硅从钠钙玻璃衬底扩散到铜铟硒（CuInSe₂）薄膜中，并在晶界处聚集。在体相中测量到钠和氧的浓度非常低。在晶界处发现硒耗尽。这些观察结果可以通过补充能量色散 X 射线光谱研究来证实。我们的结果支持 Kronik 等人（1998）提出的模型[1]，该模型通过在晶界处钝化硒空位来解释含钠的铜铟硒（CuInSe₂）太阳能电池光电效率的提高。
