Annealing-Insensitive, Alcohol-Processed MoO x Hole Transport Layer for Universally Enabling High-Performance Conventional and Inverted Organic Solar Cells

作者：Can Song, Xiaofang Huang, Tao Zhan, Ling Ding, Yang Li, Xiaogang Xue, Xiangcheng Lin, Hongliang Peng, Ping Cai, Chunhui Duan, Junwu Chen · 发表于：ACS Applied Materials & Interfaces · 年份：2022 · DOI：10.1021/acsami.2c09413 · 被引用次数：27 · 研究领域：Organic Electronics and Photovoltaics、Conducting polymers and applications、Perovskite Materials and Applications

At present, most solution-processed molybdenum oxide (s-MoO x ) hole transport layers (HTLs) are still mainly used in conventional organic solar cells (OSCs) but unsuitable for inverted OSCs. Herein, we demonstrate for the first time an annealing-insensitive, alcohol-processed MoO x HTL that can universally enable high-performance conventional and inverted OSCs. The s-MoO x HTL is spin-coated from the MoO x nanoparticle dispersion in alcohol, where the MoO x nanoparticles are synthesized by simple nonaqueous pyrolysis conversion of MoO 2 (acac) 2 . The MoO x nanoparticles possess uniform and very small sizes of less than 5 nm and can be well dispersed in alcohol, so the s-MoO x HTLs on ITO and active layer both show an overall uniform and smooth surface, suitable for conventional and inverted OSCs. In addition, the s-MoO x HTL possesses decent optical transmittance and appropriate work function. Utilizing the s-MoO x HTL annealed between room temperature and 110 °C and PM6:Y6 active layer, the conventional OSCs show an excellent power conversion efficiency (PCE) of 16.64–17.09% and the inverted OSCs also show an excellent PCE of 15.74–16.28%, which indicate that the s - MoO x HTL could be annealing-insensitive and universal for conventional and inverted OSCs. Moreover, conventional and inverted OSCs with the s-MoO x HTLs annealed at 80 °C both exhibit optimal PCEs of 17.09 and 16.28%, respectively, which are separately superior than that of the PEDOT:PSS-based conventional OS...