A work-function tunable polyelectrolyte complex (PEI:PSS) as a cathode interfacial layer for inverted organic solar cells
A work-function tunable polyelectrolyte complex (PEI:PSS) as a cathode interfacial layer for inverted organic solar cells
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DOI：
10.1039/c4ta00289j
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发表时间：
2014-01-01
影响因子：
11.9
通讯作者：
Zhu, Chunxiang
中科院分区：
文献类型：
--
作者：
Lin, Zhenhua;Chang, Jingjing;Zhu, Chunxiang
高效率的倒置聚合物太阳能电池（PSC）的复合物，聚乙烯亚胺：聚（苯乙烯磺酸盐）（PEI：PSS），作为阴极界面层，有效的电子提取证明。通过将带负电荷的PSS-作为抗衡离子引入PEI中，可以调节亚胺质子化，从而导致PEI：PSS涂覆的ITO的功函数可调。PSS在PEI中的掺入增强了器件的光电流和功率转换效率（PCE），这是由于在PEI：PSS-活性层界面处改善的电子提取。此外，TiOx-PEI：PSS组合界面层进一步提高了电池性能，并且由于界面层中的空穴阻挡和表面态钝化的改善，消除了对TiOx的光浸泡处理的需要。所实现的高电池性能、更好的稳定性、低成本材料和TiOx-PEI：PSS界面层的低温溶液工艺证明了用于实现高效和长寿命PSC的有前景的阴极配置。
High-efficiency inverted polymer solar cells (PSCs) with a polyelectrolyte complex, polyethylenimine: poly(styrenesulfonate) (PEI:PSS), as the cathode interfacial layer for efficient electron extraction are demonstrated. By introducing the negatively charged PSS- as the counter ions into PEI, the imine protonation could be tuned, leading to tunable work-function of the PEI: PSS coated ITO. The incorporation of PSS in PEI enhances the photocurrent and power conversion efficiency (PCE) of the devices, due to an improved electron extraction at the PEI: PSS-active-layer interfaces. Furthermore, a TiOx-PEI: PSS combined interfacial layer further enhances the cell performance and eliminates the need for light-soaking treatment for TiOx, owing to the improved hole-blocking and surface-state passivation in the interfacial layer. The achieved high cell performance, better stability, low-cost materials, and low-temperature solution processes of the TiOx-PEI: PSS interfacial layers demonstrate a promising cathode configuration for realizing efficient and long lifetime PSCs.