Solution-processed MoO3:PEDOT:PSS hybrid hole transporting layer for inverted polymer solar cells.
Solution-processed MoO3:PEDOT:PSS hybrid hole transporting layer for inverted polymer solar cells.
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DOI：
10.1021/am509049t
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发表时间：
2015-03
影响因子：
9.5
通讯作者：
Yiling Wang;Qun Luo;Na Wu;Qian-Kun Wang;Hongfei Zhu;Liwei Chen;Yanqing Li;Li-Qiang Luo
中科院分区：
文献类型：
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作者：
Yiling Wang;Qun Luo;Na Wu;Qian-Kun Wang;Hongfei Zhu;Liwei Chen;Yanqing Li;Li-Qiang Luo
制备了由MoO3纳米粒子和PEDOT:PSS组成的溶液处理有机-无机杂化物，用于倒置有机太阳能电池的空穴传输层（HTL）。将PEDOT:PSS水溶液与MoO3乙醇悬浮液简单混合，制备了MoO3:PEDOT:PSS杂化油墨。提出了MoO3:PEDOT:PSS混合墨水的核壳结构，其中PEDOT链作为核心，与PSS链连接的MoO3纳米颗粒作为复合壳。与PEDOT:PSS的混合抑制了MoO3纳米粒子的聚集，使表面更光滑。此外，由于亲水PSS链通过与MoO3优先连接而钝化，MoO3纳米颗粒与光活性层之间的附着力增强，提高了MoO3:PEDOT:PSS杂化油墨的成膜能力。因此，MoO3:PEDOT:PSS杂化HTL无需任何表面处理即可沉积在疏水性光活性聚合物层上。使用MoO3:PEDOT:PSS混合HTL，优化后的P3HT:PC61BM-和PTB7:PC61BM-基倒置有机太阳能电池的功率转换效率分别为3.29%和5.92%，与使用热蒸发MoO3 HTL的控制装置的功率转换效率（分别为3.05%和6.01%）相当。此外，基于html的混合设备对设备性能的html厚度依赖性较小，使其更适合卷对卷印刷工艺。最后，仔细研究了MoO3与PEDOT:PSS的掺合比例对光伏性能和器件稳定性的影响，结果表明，随着MoO3掺合比例的增加，器件性能下降，但长期稳定性提高。
Solution-processed organic-inorganic hybrids composing of MoO3 nanoparticles and PEDOT:PSS were developed for use in inverted organic solar cells as hole transporting layer (HTL). The hybrid MoO3:PEDOT:PSS inks were prepared by simply mixing PEDOT:PSS aqueous and MoO3 ethanol suspension together. A core-shell structure was proposed in the MoO3:PEDOT:PSS hybrid ink, where PEDOT chains act as the core and MoO3 nanoparticles connected with PSS chains act as the composite shell. The mixing with PEDOT:PSS suppressed the aggregation of MoO3 nanoparticles, which led to a smoother surface. In addition, since the hydrophilic PSS chains were passivated through preferentially connection with MoO3, the stronger adhesion between MoO3 nanoparticles and the photoactive layer improved the film forming ability of the MoO3:PEDOT:PSS hybrid ink. The MoO3:PEDOT:PSS hybrid HTL can therefore be feasibly deposited onto the hydrophobic photoactive polymer layer without any surface treatment. The use of the MoO3:PEDOT:PSS hybrid HTL resulted in the optimized P3HT:PC61BM- and PTB7:PC61BM-based inverted organic solar cells reaching highest power conversion efficiencies of 3.29% and 5.92%, respectively, which were comparable with that of the control devices using thermally evaporated MoO3 HTL (3.05% and 6.01%, respectively). Furthermore, less HTL thickness dependence of device performance was found for the hybrid HTL-based devices, which makes it more compatible with roll-to-roll printing process. In the end, influence of the blend ratio of MoO3 to PEDOT:PSS on photovoltaic performance and device stability was studied carefully, results indicated that the device performance would decrease with the increase of MoO3 blended ratio, whereas the long-term stability was improved.