<br>用于高效有机光伏电池的完全非熔融中宽禁带受体的设计与合成,ACS Applied Materials & Interfaces

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用于高效有机光伏电池的完全非熔融中宽禁带受体的设计与合成
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2024-12-19 , DOI: 10.1021/acsami.4c17283
Shuohan Cheng _{1,

2} , Ni Yang _{1,

2} , Yong Cui ₁ , Wenxuan Wang _{1,

2} , Yang Xiao _{1,

2} , Jiangbo Dai _{1,

2} , Junzhen Ren _{1,

2} , Yafei Wang _{1,

2} , Jianqiu Wang _{1,

2} , Zhihao Chen ₁ , Yue Yu _{1,

2} , Jianhui Hou _{1,

2}

Affiliation

中宽禁带（MWBG）有机光伏（OPV）电池已成为一个前景广阔的类别，具有独特的应用可能性，尤其是在以特定光照条件为特征的环境中，例如室内空间。然而，高效的 MWBG 受体很少，而且大多是通过高成本的熔断中心单元构建的，这限制了 MWBG OPV 电池的产业化。在这里，合成了两个完全未熔融的 MWBG 受体 TBT-38 和 TBT-43，它们在噻吩环上具有不同的烷氧基取代基位置。由于合成路线简单且产率高，TBT-38 在高效 MWBG 受体中实现了最低的仅材料成本。当与高性能供体 PBQx-TF 混合时，基于 TBT-43 的 OPV 电池的功率转换效率（PCE）仅为 8.33%。相比之下，主要是由于更高的激子解离效率、电荷传输能力和良好的形态，基于 TBT-38 的 OPV 电池在一次阳光照射下提供 13.5% 的 PCE，这是吸收开始低于 800 nm 的完全未融合 OPV 细胞的最高结果之一。此外，基于 PBQx-TF：TBT-38 的 OPV 电池在室内照明下表现出 24.1% 的 PCE。我们的工作提出了一种设计具有成本效益的 MWBG 受体的实用策略。

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Design and Synthesis of Completely Nonfused Medium-Wide-Bandgap Acceptors for Efficient Organic Photovoltaic Cells

Medium-wide-bandgap (MWBG) organic photovoltaic (OPV) cells have emerged as a promising category with distinctive application possibilities, especially in environments characterized by specific light conditions, such as indoor spaces. However, there are few high-efficiency MWBG acceptors, and most of them are constructed through high-cost fused central units, which limits the industrialization of MWBG OPV cells. Here, two completely nonfused MWBG acceptors, TBT-38 and TBT-43 with different alkoxy substituent positions on the thiophene rings, are synthesized. Due to the simple synthetic route and high yield, TBT-38 achieves the lowest material-only cost among high-efficiency MWBG acceptors. When blended with high-performance donor PBQx-TF, the TBT-43-based OPV cell exhibits a power conversion efficiency (PCE) of only 8.33%. In contrast, primarily due to higher exciton dissociation efficiency, charge transport capability, and favorable morphology, the TBT-38-based OPV cell delivers a PCE of 13.5% under one sun illumination, which is one of the highest results for completely nonfused OPV cells with absorption onset below 800 nm. Besides, the PBQx-TF:TBT-38-based OPV cell exhibits a PCE of 24.1% under indoor lighting. Our work presents a practical strategy for designing cost-efficient MWBG acceptors.

更新日期：2024-12-19

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