High Operation Stability of Ultraflexible Organic Solar Cells with Ultraviolet-Filtering Substrates
High Operation Stability of Ultraflexible Organic Solar Cells with Ultraviolet-Filtering Substrates
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DOI：
10.1002/adma.201808033
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发表时间：
2019-05-10
影响因子：
29.4
通讯作者：
Someya, Takao
中科院分区：
文献类型：
--
作者：
Kimura, Hiroki;Fukuda, Kenjiro;Someya, Takao
超轻和柔性电源对于驱动纺织品或可穿戴电子设备和软机器人至关重要，因为当它们附着在人体皮肤、纺织品或软致动器上时，它们不会引起不适或限制运动。有机太阳能电池（OSC）是开发此类电源的良好候选者，因为它们具有重量轻和灵活的优点。然而，同时实现操作稳定性和非线性形状仍然是困难的，因为非线性基底不能防止紫外（UV）光的穿透，这是OSC降解的主要原因。在这里，报告了表现出良好的操作稳定性和高性能的CNOSC。用作衬底的1.3 μ m厚的透明聚酰亚胺可以阻挡90%的UV范围内的350 nm波长的光。采用透明聚酰亚胺基板的太阳能电池可产生9.0%的功率转换效率（PCE），并实现了光稳定性和操作稳定性。在最大功率点跟踪测试中，PCE在3小时后保持在90%，表明比参考刚性OSC更好的操作稳定性。
Ultralightweight and flexible power sources are essential for driving textile or wearable electronic devices and soft robots because they do not induce discomfort or limit movement when they are attached to human skin, textiles, or soft actuators. Organic solar cells (OSCs) are good candidates for developing such power sources because they have the advantages of being lightweight and flexible. However, achieving operational stability and ultrathin shape simultaneously remains difficult because the ultrathin substrate cannot prevent the penetration of ultraviolet (UV) light, which is major a cause for the degradation of OSCs. Here, ultrathin OSCs that show great operational stability and high performance are reported. The 1.3 mu m thick transparent polyimide utilized as a substrate can block light of 350 nm wavelength in the UV range by 90%. The ultrathin OSCs with the transparent polyimide substrate produce a power conversion efficiency (PCE) of 9.0% and realize both photostability and operational stability. The PCE was maintained at 90% after 3 h in a maximum power point tracking test, indicating much better operational stability than the reference rigid OSCs.