对于高VOC的有机太阳能电池,基于诺素的非富勒伦受体中的中心核心大小效应
Xinya Ran1,2, Yanan Shi1, Dingding Qiu1,2
1CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. lvk@nanoctr.cn.
Nanoscale
|November 9, 2023
概括
研究人员通过设计具有不同核心尺寸的非富勒林受体 (NFAs) 来优化有机太阳能电池 (OSC). 在Qx-BO-3中更小的核心提高了设备性能,达到17.03%的高功率转换效率 (PCE).
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 太阳能光伏发电是如何实现的
背景情况:
- 有机太阳能电池 (OSC) 面临着开放电路电压 (VOC) 和功率转换效率 (PCE) 之间的权衡.
- 通过骨干结合和侧链工程优化非富勒烯受体 (NFAs) 对于提高OSC性能至关重要.
研究的目的:
- 设计和合成基于昆素核的不同核心大小的新型NFAs.
- 调查中央核心大小对NFA分子几何学,膜形态学和OSC设备性能的影响.
主要方法:
- 三个不同中央核心大小的NFAs (Qx-BO-1,Qx-BO-2,Qx-BO-3) 的合成.
- 使用PM6作为捐赠材料和合成的NFAs的OSC设备的制造和表征.
- 对设备参数的分析,包括VOC,JSC,FF和PCE.
主要成果:
- 具有较小的中央核心的Qx-BO-3表现出更好的平面性和结晶性.
- PM6:Qx-BO-3装置显示了优化的相位分离,激子解离和电荷传输.
- 基于PM6:Qx-BO-3的OSC实现了高的PCE17.03%,超过了具有更大的核心的设备 (10.57%和11.34%).
结论:
- 微调NFA的中央核心大小是一种有效的策略,可以优化OSC中的分子几何和膜形态.
- 本研究展示了一种设计高性能NFA的方法,用于具有高VOC的OSC.
- 结果强调了分子设计在平衡光伏关键参数以改善PCE方面的重要性.
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