期刊
IEEE JOURNAL OF PHOTOVOLTAICS
卷 10, 期 1, 页码 250-254出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOTOV.2019.2945196
关键词
In2O3:Sn; photovoltaic cells; reflective back contacts; ultrathin Cu(In,Ga)Se-2
资金
- ARCIGS-M Project, as part of the European Union's Horizon 2020 Research and Innovation Program [720887]
We report on the development of highly reflective back contacts (RBCs) made of multilayer stacks for ultrathin CIGS solar cells. Two architectures are compared: they are made of a silver mirror coated either with a single layer of In2O3:Sn (ITO) or with a bilayer of ZnO:Al/ITO. Due to the improvement of CIGS rear reflectance, both back contacts result in a significant external quantum efficiency enhancement, in agreement with optical simulations. However, solar cells fabricated with Ag/ITO back contacts exhibit a strong shunting behavior. The key role of the ZnO:Al layer to control the morphology of the top ITO layer and to avoid silver diffusion through the back contact is highlighted. For a 500-nm-thick CIGS layer, this optimized RBC leads to a best cell with a short-circuit current of 27.8 mA/cm(2) (+2.2 mA/cm(2) as compared to a Mo back contact) and a 12.2%-efficiency (+2.5% absolute).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据