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Utilizing insulating nanoparticles as the spacer in laminated flexible polymer solar cells for improved mechanical stability

机译：在层压柔性聚合物太阳能电池中使用绝缘纳米颗粒作为隔离层以提高机械稳定性

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摘要

Roll-to-roll lamination is one promising technique to produce large-area organic electronic devices such as solar cells with a large through output. One challenge in this process is the frequent electric point shorting of the cathode and anode by the excess or concentrated applied stress from many possible sources. In this paper, we report a method to avoid electric point shorting by incorporating insulating and hard barium titanate (BaTiO_ 3) nanoparticles (NPs) into the active layer to work as a spacer. It has been demonstrated that the incorporated BaTiO_ 3 NPs in poly(3- hexylthiophene):[6,6]-phenyl-c-61-butyric acid methyl ester (P3HT:PCBM) bulk heterojunction solar cells cause no deleterious effect to the power conversion process of this type of solar cell. The resulting laminated devices with NPs in the active layer display the same efficiency as the devices without NPs, while the laminated devices with NPs can sustain a ten times higher lamination stress of over 6MPa. The flexible polymer solar cell device with incorporated NPs shows a much smaller survivable curvature radius of 4mm, while a regular flexible device can only sustain a bending curvature radius of 8mm before fracture.
机译：卷对卷层压是一种有前途的技术，用于生产大面积有机电子器件，例如具有大通量输出的太阳能电池。该过程中的一个挑战是由于来自许多可能来源的过量或集中的施加应力而导致阴极和阳极的频繁电点短路。在本文中，我们报告了一种通过将绝缘且坚硬的钛酸钡（BaTiO_3）纳米粒子（NPs）掺入有源层中作为隔离层来避免电点短路的方法。已经证明，在聚（3-己基噻吩）：[6,6]-苯基-c-61-丁酸甲酯（P3HT：PCBM）本体异质结太阳能电池中掺入BaTiO_3 NP对功率没有有害影响这种类型的太阳能电池的转换过程。所得的在有源层中具有NP的层压器件显示出与不具有NP的器件相同的效率，而具有NP的层压器件可以承受超过6MPa的十倍高的层压应力。掺有NP的柔性聚合物太阳能电池器件的生存曲率半径要小得多，为4mm，而常规柔性器件在断裂前只能保持8mm的弯曲曲率半径。

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