Intrinsically stretchable organic solar cells (IS-OSCs) are a promising class of wearable power sources. Although the power conversion efficiency (PCE) and mechanical stretchability of IS-OSCs have significantly improved, the current stretchability level still falls short of meeting the demands of wearable electronics. The power output (PCE × photoactive area) of these OSCs is a key figure of merit in determining their potential as power sources. However, the impact of stretching on changes in the photoactive area and the resulting power output has not been investigated. In this study, we construct highly stretchable and efficient photoactive systems by designing a polymer donor, PBET-TF. IS-OSCs based on PBET-TF maintain over 80% of their original PCE up to 50% strain (strain at PCE_80% = 50%), which significantly outperforms the reference PBDB-TF-based IS-OSCs (strain at PCE_80% = 11%). Importantly, for the first time, we demonstrate strain-induced power output increases in IS-OSCs using the developed PBET-TF-based photoactive systems.

中文翻译：

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本征可拉伸有机太阳能电池的应变诱导功率输出增强


本质可拉伸有机太阳能电池 （IS-OSC） 是一类很有前途的可穿戴电源。尽管 IS-OSC 的功率转换效率 （PCE） 和机械拉伸性得到了显著提高，但目前的拉伸性水平仍未满足可穿戴电子产品的需求。这些 OSC 的功率输出（PCE ×光活性面积）是确定其作为电源潜力的关键品质因数。然而，拉伸对光活性区域变化和由此产生的功率输出的影响尚未得到研究。在这项研究中，我们通过设计聚合物供体 PBET-TF 构建了高度可拉伸和高效的光活性系统。基于 PBET-TF 的 IS-OSC 保持其原始 PCE 的 80% 以上，最高 50% 菌株（PCE_80% = 50% 菌株），明显优于基于 PBDB-TF 的参考 IS-OSC（PCE_80% = 11% 菌株）。重要的是，我们首次展示了使用开发的基于 PBET-TF 的光活性系统在 IS-OSC 中应变诱导的功率输出增加。