混溶性
材料科学
液相线
无定形固体
热力学
聚合物
低临界溶液温度
渗透(认知心理学)
旋节分解
相(物质)
化学工程
化学物理
有机化学
化学
复合材料
合金
物理
工程类
生物
神经科学
共聚物
作者
Long Ye,Brian A. Collins,Xuechen Jiao,Jingbo Zhao,He Yan,Harald Ade
标识
DOI:10.1002/aenm.201703058
摘要
Abstract Polymer solar cells (PSCs) continue to be a promising low‐cost and lead‐free photovoltaic technology. Of critical importance to PSCs is understanding and manipulating the composition of the amorphous mixed phase, which is governed by the thermodynamic molecular interactions of the polymer donor and acceptor molecules and the kinetics of the casting process. This progress report clarifies and defines nomenclature relating to miscibility and its relevance and implications to PSC devices in light of new developments. Utilizing a scanning transmission X‐ray microscopy method, the temperature dependences of “molecular miscibility” in the presence of fullerene crystals, now referred to liquidus miscibility, are presented for a number of representative blends. An emphasis is placed on relating the amorphous miscibility of high‐efficiency PSC blends at a given processing temperature with their actual device performance and stability. It is shown and argued that a system with an amorphous miscibility close to percolation exhibits the most stable morphology. Furthermore, an approach is outlined to convert liquidus miscibility to an effective Flory–Huggins interaction parameter χ. Crucially, determination of temperature‐dependent amorphous miscibility paves a way to rationally optimize the stability and mixing behaviors of PSCs at actual processing and operating temperatures.
科研通智能强力驱动
Strongly Powered by AbleSci AI