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首页> 外文会议>2014 Joint IEEE International Symposium on the Applications of Ferroelectrics, International Workshop on Acoustic Transduction Materials and Devices amp; Workshop on Piezoresponse Force Microscopy >High temperature induced mechanical degradation in flexible solar cell and its effect on reliability of the packaging module
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High temperature induced mechanical degradation in flexible solar cell and its effect on reliability of the packaging module

机译：柔性太阳能电池中高温诱导的机械降解及其对封装模块可靠性的影响

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Polymer based organic photovoltaic systems, which can be mass-produced by roll-to-roll printing technology, hold the promise for a cost-effective, lightweight and mechanical flexible solar energy conversion platform. Nevertheless, challenges still remain for large-scale applications of these flexible solar cells. One of the issues of great importance is the long-time reliability of solar cell module. It is demonstrated that organic solar cells can have wide range of applications, and therefore the surrounding temperature, humidity and load conditions vary. Rapidly changing thermo-mechanical loads often produce early failure of certain parts of the solar cell module, or even fracture of overall packaging which may result in the degradation of performance and life of solar cell. Therefore our work mainly focuses on the effect of elevated temperature on mechanical properties of materials in flexible solar cell panel. Temperature induced mechanical degradation and its effect on reliability of the packaging module are investigated. In our test, the samples made from flexible solar cell panel are stretched at a certain strain rate by test machine at 25°C, 75°C and 125°C, respectively. We find that Young's modulus of the materials decrease sharply with increasing temperature from the nominal stress-strain curve of materials and interfacial delamination occurs prior to material fracture at higher temperatures. Test results indicate that high temperature will not only reduce the mechanical stiffness of the materials in flexible solar cell, but also weaken the tensile strength of the material, which eventually undermined the reliability of solar cell packaging.
机译：可以通过卷对卷印刷技术批量生产的基于聚合物的有机光伏系统，有望实现具有成本效益，轻巧和机械灵活的太阳能转换平台。然而，这些柔性太阳能电池的大规模应用仍然面临挑战。极为重要的问题之一是太阳能电池模块的长期可靠性。已经证明有机太阳能电池可以具有广泛的应用范围，因此周围的温度，湿度和负载条件会发生变化。快速变化的热机械负载通常会导致太阳能电池模块某些部分的早期失效，甚至导致整体包装破裂，这可能会导致太阳能电池性能和寿命下降。因此，我们的工作主要集中在高温对柔性太阳能电池板材料机械性能的影响上。研究了温度引起的机械降解及其对包装模块可靠性的影响。在我们的测试中，将柔性太阳能电池板制成的样品分别通过试验机在25°C，75°C和125°C下以一定的应变率拉伸。我们从材料的标称应力-应变曲线中发现，材料的杨氏模量随温度的升高而急剧下降，并且在较高温度下，在材料破裂之前发生界面分层。测试结果表明，高温不仅会降低柔性太阳能电池中材料的机械刚度，而且会削弱材料的拉伸强度，最终破坏了太阳能电池包装的可靠性。

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