迁移率-寿命关系将旋涂与凹版印刷有机太阳能电池的光降解联系起来
Mobility-lifetime relation links photodegradation in spin-coated and gravure-printed organic solar cells
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中文总结 AI 辅助
该研究通过对比旋涂与凹版印刷有机太阳能电池的千小时光照老化，发现迁移率-寿命乘积统一描述光降解，并揭示印刷器件中寿命延长但迁移率下降的反常现象。
中文摘要 AI 辅助
有机太阳能电池（OSCs）的降解机制主要在旋涂的实验室规模器件中研究，而可扩展加工会改变器件架构、活性层形貌以及底层电荷传输和复合特性。这些变化是否也会改变太阳能电池的降解方式仍不清楚。在此，我们比较了旋涂和完全兼容卷对卷工艺的凹版印刷PM6:Y12太阳能电池在约1000小时连续光照下的表现。尽管初始特性和降解特征不同，功率转换效率的损失系统地遵循迁移率-寿命乘积μτ。值得注意的是，印刷器件的老化增加了复合寿命，同时大幅降低了电荷载流子迁移率，表明更长的寿命本身并不意味器件性能的提升。迁移率降低伴随PM6层状有序度下降，而额外的开路电压损失主要源于非辐射复合增加。暗态恢复进一步揭示了印刷架构特有的亚稳态贡献。这些结果确定迁移率-寿命乘积是光降解的统一物理描述符，将老化引起的微观变化与旋涂和可扩展印刷OSCs的宏观性能损失联系起来。
英文摘要
The degradation mechanisms of organic solar cells (OSCs) have been studied primarily in spin-coated, laboratory-scale devices, whereas scalable processing modifies the device architecture, active-layer morphology, and underlying charge-transport and recombination properties. Whether these changes also alter how solar cells degrade remains unclear. Here, we compare spin-coated and fully roll-to-roll-compatible gravure-printed PM6:Y12 solar cells during $\sim$1000 h of continuous illumination. Despite distinct initial properties and degradation signatures, the loss of power-conversion efficiency systematically follows the mobility-lifetime product $μτ$. Remarkably, ageing of the printed devices increases the recombination lifetime while strongly reducing charge-carrier mobility, showing that a longer lifetime alone does not imply improved device performance. The mobility reduction is accompanied by decreased PM6 lamellar order, whereas the additional open-circuit voltage loss originates predominantly from increased non-radiative recombination. Dark recovery further reveals a metastable contribution specific to the printed architecture. These results identify the mobility-lifetime product as a unifying physical descriptor for photodegradation, linking ageing-induced microscopic changes to macroscopic performance loss across spin-coated and scalable printed OSCs.
发表机构
- Technische Universität Chemnitz（开姆尼茨工业大学）
- Friedrich-Alexander University Erlangen-Nürnberg（埃尔朗根-纽伦堡弗里德里希·亚历山大大学）
- University of Bayreuth（拜罗伊特大学）
- University of Potsdam（波茨坦大学）
- Paul Drude Institute for Solid State Electronics（保罗·德鲁德固态电子研究所）
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