首页> 美国卫生研究院文献>Nanoscale Research Letters >WO3 Nanoparticles or Nanorods Incorporating Cs2CO3/PCBM Buffer Bilayer as Carriers Transporting Materials for Perovskite Solar Cells
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WO3 Nanoparticles or Nanorods Incorporating Cs2CO3/PCBM Buffer Bilayer as Carriers Transporting Materials for Perovskite Solar Cells

机译:掺有Cs2CO3 / PCBM缓冲双层的WO3纳米颗粒或纳米棒作为钙钛矿太阳能电池的载体运输材料

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摘要

In this work, we demonstrate a novel carrier transporting combination made of tungsten trioxide (WO3) nanomaterials and Cs2CO3/PCBM buffer bilayer for the fabrication of perovskite solar cells (PSCs). Two different types of WO3, including nanoparticles and nanorods, were prepared by sol-gel process and hydrothermal method, respectively. Cs2CO3/PCBM buffer bilayer was inserted between WO3 and perovskite layers to improve charge transfer efficiency and formation of pinhole-free perovskite layer. Besides, the leakage current of the devices containing Cs2CO3/PCBM buffer bilayer was significantly suppressed. The optimized device based on WO3 nanoparticles and Cs2CO3/PCBM bilayer showed an open-circuit voltage of 0.84 V, a short-circuit current density of 20.40 mA/cm2, a fill factor of 0.61, and a power conversion efficiency of 10.49 %, which were significantly higher than those of PSCs without Cs2CO3/PCBM buffer bilayer. The results revealed that the combination of WO3 nanomaterials and Cs2CO3/PCBM bilayer provides an effective solution for improving performances of PSCs.
机译:在这项工作中,我们演示了由三氧化钨(WO3)纳米材料和Cs2CO3 / PCBM缓冲双层制成的新型载流子传输组合,用于制造钙钛矿太阳能电池(PSC)。分别通过溶胶-凝胶法和水热法制备了两种不同类型的WO3,包括纳米颗粒和纳米棒。将Cs2CO3 / PCBM缓冲双层插入WO3和钙钛矿层之间,以提高电荷转移效率并形成无针孔的钙钛矿层。此外,含有Cs2CO3 / PCBM缓冲双层的器件的漏电流得到了显着抑制。基于WO3纳米颗粒和Cs2CO3 / PCBM双层薄膜的优化器件显示开路电压为0.84V,短路电流密度为20.40mA / cm 2 ,填充系数为0.61,功率转换效率为10.49%,显着高于没有Cs2CO3 / PCBM缓冲双层的PSC。结果表明,WO3纳米材料和Cs2CO 3 / PCBM双层膜的结合为提高PSC的性能提供了有效的解决方案。

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