Unveiling the Impact of Light-Induced Acceptor-Generated ROS on Device Stability in Organic Photovoltaics,ACS Applied Materials & Interfaces

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Unveiling the Impact of Light-Induced Acceptor-Generated ROS on Device Stability in Organic Photovoltaics
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2024-03-21 , DOI: 10.1021/acsami.3c19612
Chao Yang ₁ , Sheng-Yu Shi ₂ , Jie Zhang ₁ , Lianke Wang ₁ , Zhi-Peng Yu ₁ , Hongping Zhou _{1,

2}

Affiliation

The intrinsic stability of the acceptor is a crucial component of the photovoltaic device stability. In this study, we investigated the efficiency and stability of the nonfused-ring acceptors LC8 and BC8 under indoor light conditions. Interestingly, we found that devices based on BC8 with terminal side chains exhibited a higher indoor efficiency and stability. Through accelerated aging experiments, we discovered that the acceptors generate singlet oxygen under light exposure with BC8 demonstrating lower levels of ROS compared to LC8. We attribute this difference to the modulation of the acceptor aggregation orientation. Furthermore, the generated reactive oxygen species (ROS) further deteriorate the acceptor structure, and this phenomenon is also observed in high-efficiency acceptor structures, such as Y6. Our research reveals important mechanisms of acceptor photo-oxidation processes, providing a theoretical basis for enhancing the intrinsic stability of acceptors.

中文翻译：

揭示光诱导受体产生的 ROS 对有机光伏器件稳定性的影响

受体的固有稳定性是光伏器件稳定性的关键组成部分。在这项研究中，我们研究了非稠环受体 LC8 和 BC8 在室内光照条件下的效率和稳定性。有趣的是，我们发现基于BC8、带有终端侧链的设备表现出更高的室内效率和稳定性。通过加速老化实验，我们发现受体在光照下产生单线态氧，与 LC8 相比，BC8 表现出较低水平的 ROS。我们将这种差异归因于受体聚集方向的调制。此外，产生的活性氧（ROS）进一步恶化受体结构，这种现象在高效受体结构（例如Y6）中也观察到。我们的研究揭示了受体光氧化过程的重要机制，为增强受体的内在稳定性提供了理论基础。

更新日期：2024-03-21

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