Space environmental testing of flexible coverglass alternatives based on siloxanes

作者：Smeenk N J^*; Mooney C; Feenstra J; Mulder P; Rohr T; Semprimoschni C O A; Vlieg E; Schermer J J

来源：Polymer Degradation and Stability, 2013, 98(12): 2503-2511.

DOI：10.1016/j.polymdegradstab.2013.09.008

• Siloxanes
• UV degradation
• Electron irradiation
• Discolouration

With the development of thin-film, high-efficient III-V solar cells using the epitaxial lift-off technique, flexible solar panels for space applications can be designed. Besides new deployment options, this also reduces the mass and thus launch costs of a satellite. One requirement for such a flexible panel configuration is the replacement of the brittle coverglass, which shields the solar cells from the harsh space environment, by a flexible alternative. In this work we have tested several compositions of a polysiloxane candidate material for a flexible shielding layer by exposing them to high energy UV and electron radiation at elevated temperatures. It was found that irradiation by electrons with a fluence corresponding to 15 years in space produces little degradation. UV radiation, on the other hand, has a more pronounced impact on the material properties, causing a discolouration of the transparent material and for some compositions even cracking of the samples.

• 出版日期2013-12