Polyolefin Elastomer as the Anode Interfacial Layer for Improved Mechanical and Air Stabilities in Nonfullerene Solar Cells
Polyolefin Elastomer as the Anode Interfacial Layer for Improved Mechanical and Air Stabilities in Nonfullerene Solar Cells
复制标题
聚烯烃弹性体作为阳极界面层可改善非富勒烯太阳能电池的机械和空气稳定性
DOI：
10.1021/acsami.9b18095
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发表时间：
2020-03-04
影响因子：
9.5
通讯作者：
Chen, Yiwang
中科院分区：
文献类型：
--
作者：
Ge, Yansong;Hu, Lin;Chen, Yiwang
尽管有机太阳能电池（OSC）的功率转换效率（PCE）值有所突破，但另一个重要问题涉及稳定性，这是潜在商业化迫切需要解决的问题。一种商业和化学稳定的聚烯烃弹性体（POE）被纳入高性能PBDB-T：ITIC，PM6：IT-4F，和PM6：Y6非富勒烯系统作为阳极界面层，提供显着改善的机械和空气稳定性相比，大多数研究的MoO3界面层。由于活性层的表面接触电位升高以及活性层与电极之间的欧姆接触更好，POE选择性地传输空穴而不是电子。除了银原子扩散到活性层之外，用作封装层的POE还应该抑制水和氧气的渗透。在湿度约为70%的空气环境中储存150天后，具有POE阳极界面层的基于PM6：IT-4F的器件的PCE从11.88%下降到9.60%，保持其原始PCE值的80.8%。使用MoO 3作为阳极界面层的器件在储存仅30天后，PCE值就从12.31%急剧下降到2.98%。POE可以用于灵活和大规模的器件制造，加速OSC的商业化。
Despite the breakthroughs in power conversion efficiency (PCE) values of organic solar cells (OSCs), the other important issue concerns stability, which is urgently needed to be resolved for potential commercialization. A commercial and chemically stable polyolefin elastomer (POE) was incorporated into high-performance PBDB-T:ITIC, PM6:IT-4F, and PM6:Y6 nonfullerene systems to serve as the anode interfacial layer, affording remarkably improved mechanical and air stabilities when compared with those of the most studied MoO3 interfacial layer. The POE was found to selectively transport holes rather than electrons due to the upshifted surface contact potential of the active layer and the better ohmic contact between the active layer and the electrode. The POE serving as an encapsulating layer is supposed to suppress the penetration of water and oxygen in addition to the diffusion of Ag atoms into the active layer. After storing in an air environment with a humidity of approximately 70% for 150 days, the PCE of the device based on PM6:IT-4F with the POE anode interfacial layer decreased from 11.88 to 9.60%, retaining 80.8% of its original PCE value. The device using MoO3 as the anode interfacial layer showed a PCE value that was sharply reduced from 12.31 to 2.98% after storing for only 30 days. The POE could be potentially useful for flexible and large-scale device fabrication, accelerating the commercialization of OSCs.