State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
Department of Chemistry, Northeast Normal University, Changchun, Jilin, 130024, P. R. China.
Adv Mater. 2018 Aug;30(35):e1801718. doi: 10.1002/adma.201801718. Epub 2018 Jul 15.
Currently, solution-processed MoO anode interfacial layers (AILs) can only be fabricated by the spin-coating method in organic solar cells (OSCs), which severely limits their use in practical productions where large-area printing techniques are used. Herein, a facile method is demonstrated to prepare highly conductive MoO (denoted EG:Mo) that can be processed by printing methods such as wire-bar and blade coatings. The EG:Mo films are prepared by depositing an aqueous solution containing ammonium heptamolybdate (VI) tetrahydrate (NMo) and ethylene glycol (EG) and annealing at 200 °C. UV-vis absorption and X-ray photoelectron spectroscopy measurements confirm that Mo (VI) can be reduced to Mo (V) by EG, resulting in the n-doped EG:Mo. Using the EG:Mo as AILs, an OSC based on a PB3T:IT-M active layer exhibits a power conversion efficiency (PCE) of 12.1%, which is comparable to that of the PEDOT:PSS modified devices. More importantly, EG:Mo AILs can be processed by wire-bar and blade-coating methods, and the corresponding devices show PCEs of 11.9% and 11.5%, respectively. Furthermore, the EG:Mo AIL is processed by wire-bar coating to fabricate a large area device (1.0 cm ), and a PCE of 10.1% is achieved.
目前，溶液处理的 MoO 阳极界面层（AIL）只能通过旋涂法在有机太阳能电池（OSC）中制备，这严重限制了它们在使用大面积印刷技术的实际生产中的应用。本文展示了一种简便的方法来制备高导电性的 MoO（表示为 EG:Mo），它可以通过印刷方法如丝棒和刀片涂布进行处理。EG:Mo 薄膜是通过沉积含有四水合钼酸铵（VI）（NMo）和乙二醇（EG）的水溶液并在 200°C 下退火制备的。UV-vis 吸收和 X 射线光电子能谱测量证实，EG 可以将 Mo（VI）还原为 Mo（V），从而导致 n 型掺杂的 EG:Mo。使用 EG:Mo 作为 AIL，基于 PB3T:IT-M 活性层的 OSC 表现出 12.1%的功率转换效率（PCE），与 PEDOT:PSS 改性器件相当。更重要的是，EG:Mo AIL 可以通过丝棒和刀片涂布方法进行处理，相应的器件分别表现出 11.9%和 11.5%的 PCE。此外，EG:Mo AIL 通过丝棒涂布进行处理，以制造大面积器件（1.0 cm ），并实现了 10.1%的 PCE。
