二胺受体的环融合使得高效的非烯有机太阳能电池具有较小的电压损失
Jianquan Zhang1, Yunke Li1, Jiachen Huang1
1Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration & Reconstruction, Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong.
Journal of the American Chemical Society
|November 8, 2017
概括
研究人员开发了一种用于有机太阳能电池的新型融合小分子受体 (FTTB-PDI4). 这种基于PDI的材料实现了创纪录的10.58%的功率转换效率,
科学领域:
- 材料科学
- 有机电子
- 太阳能发电
背景情况:
- 小分子受体 (SMA) 对有机太阳能电池 (OSC) 的性能至关重要.
- 二胺 (PDI) 衍生物是广泛研究的SMA,但它们的效率通常受到分子包装和能量水平的限制.
- 基于PDI的SMA优化策略对于推进OSC技术至关重要.
研究的目的:
- 设计和合成一种基于PDI四聚体核的新型环融合小分子受体 (FTTB-PDI4).
- 研究环融合对基于PDI的SMA的光电子特性和形态的影响.
- 评估FTTB-PDI4在有机太阳能电池中的性能,并为基于PDI的设备建立一个新的基准.
主要方法:
- 通过在四乙核上化和PDI单元合成FTTB-PDI4.
- 光物理性质的表征,包括能量水平和光吸收.
- 使用评估域纯度和分子包装的技术进行形态分析.
- 使用FTTB-PDI4作为SMA的有机太阳能电池的制造和测试.
- 理论计算以了解分子几何和电子结构.
主要成果:
- FTTB-PDI4的电压损失小于0.53V,功率转换效率高达10.58%.
- 环融合导致了更有利的能量水平,增强了光吸收,与非融合类型相比,分子间包装更强.
- 融合的分子表现出更高的域纯度,改善了分子包装和混合物中持续的电子流动性.
- 理论计算显示FTTB-PDI4具有独特的"双层"几何形状,与高度扭曲的PDI四面体不同.
结论:
- 环融合是设计基于PDI的高性能小分子受体的高效策略.
- FTTB-PDI4是一个显著的进步,实现了迄今为止基于PDI的设备的最高效率.
- 独特的"双层"几何和增强的分子间相互作用有助于FTTB-PDI4的卓越性能.
- 这项工作为未来高效的有机太阳能电池提供了有希望的分子设计方法.
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