Influence of the ITO current spreading layer on efficiencies of InGaN-based solar cells
Influence of the ITO current spreading layer on efficiencies of InGaN-based solar cells
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DOI：
10.1016/j.solmat.2015.10.026
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发表时间：
2016-02
影响因子：
6.9
通讯作者：
J. Bai;M. Athanasiou;Tao Wang
中科院分区：
文献类型：
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作者：
J. Bai;M. Athanasiou;Tao Wang
系统地研究了在InGaN基太阳电池上使用氧化铟锡(ITO)作为电流扩散层(CSL)的表面有无织构的情况，结果表明ITO对器件性能的影响是不同的。研究发现，对于平面器件，采用ITO CSL提高了转换效率；而对于表面纹理器件，它降低了转换效率。因此，表面织构太阳能电池在不使用ITO CSL的情况下获得了最佳的性能，与不使用ITO的平面电池相比，转换效率提高了75%。我们的反射率测量表明，对于平面器件，ITO CSL可以有效地抑制表面反射，而对于表面纹理器件，ITO CSL的抑制效果较差。此外，还进行了透射率测量，以估计ITO CSL的吸收。从ITO遮挡效应引起的表面反射和光损失以及与没有ITO CSL相关的功率损失方面讨论了ITO CSL的影响。
A systematic investigation of the utilization of indium-tin-oxide (ITO) as a current spreading layer (CSL) with and without a textured surface has been performed on InGaN-based solar cells, demonstrating a difference in the influence on the performance of the devices. It is found that employing an ITO CSL improves the conversion efficiency for devices with planar surfaces; whereas it reduces the efficiency for the surface textured devices. Consequently, best performance is achieved for the surface-textured solar cell without employing an ITO CSL, with an enhancement of 75% in the conversion efficiency compared to the planar cell without ITO. Our reflectance measurements show that the ITO CSL can effectively suppress surface reflection for the planar devices, while it becomes less effective for the surface-textured devices. Furthermore, a transmission measurement is carried out to estimate the absorption of the ITO CSL. The influence of the ITO CSL is discussed in terms of surface reflection and light loss due to the ITO shading effect as well as power loss associated with the absence of the ITO CSL.