Enhanced Charge Collection in Non-Fullerene Organic Solar Cells Using Iridium Complex as an Electron Extraction Layer,Advanced Materials Interfaces

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Enhanced Charge Collection in Non-Fullerene Organic Solar Cells Using Iridium Complex as an Electron Extraction Layer
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2021-09-13 , DOI: 10.1002/admi.202100850
Pengchao Zhou ₁ , Yuling Liu ₁ , Jialu Gu ₁ , Hong Lian ₂ , Weixia Lan ₁ , Yingjie Liao ₁ , Huayan Pu ₁ , Bin Wei ₁

Affiliation

Ultrathin iridium (Ir) complexes (e.g., bis[2-(4,6-difluorophenyl)pyridinato-C2,N](picolinato)iridium(III) (FIrpic)) are first introduced as electron extraction layers (EELs) in non-fullerene organic photovoltaics (OPVs), and a set of devices based on non-fullerene materials is fabricated. It is demonstrated that this approach can rationally enhance the corresponding short current density and open circuit voltage and finally improve the photovoltaic performance of OPVs. Furthermore, optimized bilayer EELs using combined FIrpic and 8-hydroxyquinoline lithium (Liq) are investigated. The resulting device presents excellent power conversion efficiency (PCE) of 15.85%, which is much higher than that of control device without FIrpic layer (14.6%). Moreover, Ir complexes show great universality when combined with other materials serving as EELs. This may provide an extra direction for further enhancement of OPVs performance.

中文翻译：

使用铱配合物作为电子提取层增强非富勒烯有机太阳能电池的电荷收集

超薄铱 (Ir) 配合物（例如，双[2-（4,6-二氟苯基）吡啶-C2，N]（吡啶甲基）铱（III）（FIrpic））首先作为电子提取层（EEL）引入非富勒烯有机光伏 (OPV) 和一组基于非富勒烯材料的器件被制造出来。结果表明，该方法可以合理提高相应的短路电流密度和开路电压，最终提高OPV的光伏性能。此外，研究了使用组合的 FIrpic 和 8-羟基喹啉锂 (Liq) 优化的双层 EEL。所得器件具有 15.85% 的出色功率转换效率 (PCE)，远高于没有 FIrpic 层的控制器件 (14.6%)。此外，当与用作 EEL 的其他材料结合时，Ir 配合物显示出极大的普遍性。

更新日期：2021-10-08

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