Xie Di, Xiang Huang, Yi Jin, Rui Hu, Xiaojie Ren, Yitong Ji, Xiaotong Liu, Xueyuan Yang, Wenchao Huang
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A Facile Anti-Solvent Method to Simultaneously Improve Efficiency and Reproducibility of Layer-by-Layer Organic Solar Cells
Layer-by-layer (LBL) spin-coating is a widely recognized method for developing high-efficiency organic solar cells (OSCs). However, in the LBL device with a conventional architecture, the residual solvents trapped in the underlying donor film will affect the interface between donor and acceptor materials as well as the morphology of upper acceptor materials, thus leading to poor reproducibility and efficiency. This study provides a facile strategy that spin-coats a mixed solvent of methanol and acetic acid, facilitating the removal of residual solvents from the donor material. The introduction of the mixed anti-solvent can also optimize the roughness, facilitate the crystallization of the donor material, and improve interfacial properties. The devices without any further treatment exhibit a power conversion efficiency (PCE) of 17.8%, while devices treated with pristine methanol achieve an efficiency up to 18.4%. Notably, devices treated with mixed methanol and acetic acid further boost efficiency to 19.3%. Furthermore, this approach is also applicable to flexible OSCs, yielding an efficiency of 18.0%.
Solar RRLPhysics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
12.10
自引率
6.30%
发文量
460
期刊介绍:
Solar RRL, formerly known as Rapid Research Letters, has evolved to embrace a broader and more encompassing format. We publish Research Articles and Reviews covering all facets of solar energy conversion. This includes, but is not limited to, photovoltaics and solar cells (both established and emerging systems), as well as the development, characterization, and optimization of materials and devices. Additionally, we cover topics such as photovoltaic modules and systems, their installation and deployment, photocatalysis, solar fuels, photothermal and photoelectrochemical solar energy conversion, energy distribution, grid issues, and other relevant aspects. Join us in exploring the latest advancements in solar energy conversion research.