Grain size dependence of degradation of aluminium/calcium cathodes in organic solar cells following exposure to humid air
Grain size dependence of degradation of aluminium/calcium cathodes in organic solar cells following exposure to humid air
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DOI：
10.1016/j.solmat.2015.03.015
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发表时间：
2015-09
影响因子：
6.9
通讯作者：
T. Glen;Nicholas W. Scarratt;Hunan Yi;A. Iraqi;Tao Wang;J. Kingsley;A. Buckley;David G Lidzey
中科院分区：
文献类型：
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作者：
T. Glen;Nicholas W. Scarratt;Hunan Yi;A. Iraqi;Tao Wang;J. Kingsley;A. Buckley;David G Lidzey
横截面 TEM 和 SEM 已用于研究有机太阳能电池暴露于高湿度环境时的降解。这种暴露造成了两个明显的影响：铝/钙界面处的空隙和顶表面上的大气泡状突起。发现进水主要从边缘发生，而不是通过铝膜中的针孔或缺陷。阴极中使用的铝的晶粒尺寸各不相同，并且发现小晶粒器件的退化速度更快。强调了通过阴极设计和材料选择来最大限度地减少水进入设备的重要性。
Cross-sectional TEM and SEM have been used to study the degradation of organic solar cells when exposed to a high humidity environment. Two obvious effects were caused by this exposure: voids at the aluminium/calcium interface and large bubble like protrusions on the top surface. Water ingress was found to occur mainly from the edge rather than through pinholes or defects in the aluminium film. The grain size of the aluminium used in the cathode was varied and small grained devices were found to have degraded faster. The importance of minimising water ingress into devices through cathode design and choice of materials is highlighted.