增强厚度不敏感的小分子阴极介层的内置电场,以实现高效和稳定的有机太阳能电池
Yuxing Wang1, Junjie Wen1, Zhe Shang1
1State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, P.R. China.
Angewandte Chemie (International ed. in English)
|April 28, 2025
概括
在有机太阳能电池 (OSC) 中优化小分子阴极介层材料 (SM-CIM) 是通过增强内置电场 (BEF) 来实现的. 新的A-D-A三位数显著提高了OSC的效率和稳定性.
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:
- 小分子阴极介层材料 (SM-CIMs) 对有机太阳能电池 (OSC) 的性能至关重要.
- 优化内置电场 (BEF) 是增强SM-CIM的一个关键策略.
- 现有的SM-CIM通常需要进一步提高效率和运营稳定性.
研究的目的:
- 调查分子设计,特别是捐赠者-接受者 (D-A) 电子框架对SM-CIM中的BEF的影响.
- 开发具有增强BEF,导电性,工作功能的调节性和能量水平对齐性的新型SM-CIM.
- 通过优化SM-CIM来提高有机太阳能电池 (OSC) 的效率和运行稳定性.
主要方法:
- 合成和表征三种伊米达功能化三元体: (TBT) 2NDI, (NDI) 2TBT和 (PDI) 2TBT,具有不同的D-A配置 (D-A-D到A-D-A).
- 在ADA结构中修改缺电子部分以调整BEF和电子特性.
- 用合成的SM-CIM组合的OSC设备的制造和测试,以及理论模拟和设备物理分析.
主要成果:
- 与D-A-D三元组 ((TBT) 2NDI) 相比,A-D-A三元组 ((NDI) 2TBT和 (PDI) 2TBT) 显示出明显增强的BEF.
- 在AD-A结构中观察到更好的导电性,工作功能的可调性,能量水平对齐和结晶性.
- 采用 (PDI) 2TBT和 (NDI) 2TBT的OSC设备显示出更高的效率 (在一个案例中为20.10%) 和运行稳定性,保持了85.0%和82.3%的峰值效率.
结论:
- 在SM-CIM中对D-A电子框架的战略修改对于提高BEF至关重要.
- 开发的AD-A三合体提供了具有活性层的优质电子通信,从而提高了光刺激利用率和减少了三重状态.
- 这项工作表明了设计先进的SM-CIM实现高性能和稳定的有机太阳能电池的有希望的途径.
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