Small molecule organic solar cells (SMOSCs) are at the forefront of organic solar cell research and have power conversion efficiencies that match the leading polymer:fullerene organic solar cells (>10%). However, the operating physics of SMOSCs is less understood than that of their polymer:fullerene counterparts. A stronger emphasis on understanding the working mechanisms of SMOSCs is thus required. This feature article aims to highlight methods for understanding a significant loss process in SMOSCs - charge carrier recombination - by using photo-induced transient optoelectronic techniques. These techniques make it is possible to probe the charge carrier density and lifetime in devices under working conditions. Employing these techniques alongside detailed morphological studies allows relationships between interfacial recombination processes, molecular packing and film nanomorphology to be obtained and can subsequently lead to more efficent devices being produced.

中文翻译：

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小分子有机太阳能电池中光诱导的电荷载流子复合动力学及膜纳米形态的影响

小分子有机太阳能电池（SMOSC）处于有机太阳能电池研究的最前沿，其功率转换效率与领先的聚合物：富勒烯有机太阳能电池（> 10％）相匹配。但是，与它们的聚合物：富勒烯对应物相比，对SMOSC的操作物理学知之甚少。因此，需要更加重视理解SMOSC的工作机制。这篇专题文章旨在重点介绍通过使用光感应瞬态光电技术来了解SMOSC中重大损耗过程的方法-载流子复合。这些技术使得有可能在工作条件下探测器件中的载流子密度和寿命。将这些技术与详细的形态学研究结合使用可实现界面重组过程之间的关系，