Bottom-Up Approaches for Precisely Nanostructuring Hybrid Organic/Inorganic Multi-Component Composites for Organic Photovoltaics
Bottom-Up Approaches for Precisely Nanostructuring Hybrid Organic/Inorganic Multi-Component Composites for Organic Photovoltaics
复制标题
用于有机光伏的精确纳米结构混合有机/无机多组分复合材料的自下而上方法
DOI：
10.1557/adv.2020.196
复制
发表时间：
2020-01-01
期刊：
影响因子：
0.8
通讯作者：
Qin, Yang
中科院分区：
文献类型：
--
作者：
Meng, Lingyao;Fan, Hongyou;Qin, Yang
在纳米尺度上实现对共轭聚合物（CP）共混物形态的控制对于提高其在各种有机光电器件（包括薄膜晶体管、光伏器件和发光二极管）中的性能至关重要。然而，复杂的CP化学结构和分子内相互作用往往使得这种控制难以实施。我们在此证明，非共价相互作用的协同组合，包括氢键、配位相互作用和π-π相互作用等，可用于有效地定义CP共混膜的形貌，特别是能够实现CP纳米结构内纳米粒子的精确空间排列。通过紫外可见吸收光谱和透射电子显微镜，我们发现富勒烯分子、CdSe 量子点和氧化铁纳米粒子在明确的 CP 纳米纤维上有很强的附着力。所得的核/壳杂化纳米纤维在用于光伏器件时表现出明确的供体/受体界面，这也有助于增强电荷分离和传输。这些发现提供了一种改善CP/纳米粒子界面特性和控制共混物形态的简便新方法。当前研究中证明的这种方法的通用性指出了一种设计基于有机聚合物和无机纳米粒子的混合材料的新方法，以应用于现代电子设备。
Achieving control over the morphology of conjugated polymer (CP) blends at nanoscale is crucial for enhancing their performances in diverse organic optoelectronic devices, including thin film transistors, photovoltaics, and light emitting diodes. However, the complex CP chemical structures and intramolecular interactions often make such control difficult to implement. We demonstrate here that cooperative combination of non-covalent interactions, including hydrogen bonding, coordination interactions, and pi-pi interactions, etc., can be used to effectively define the morphology of CP blend films, in particular being able to achieve accurate spatial arrangement of nanoparticles within CP nanostructures. Through UV-vis absorption spectroscopy and transmission electron microscopy, we show strong attachment of fullerene molecules, CdSe quantum dots, and iron oxide nanoparticles, onto well-defined CP nanofibers. The resulting core/shell hybrid nanofibers exhibit well-defined donor/acceptor interface when employed in photovoltaic devices, which also contributes to enhanced charge separation and transport. These findings provide a facile new methodology of improving CP/nanoparticle interfacial properties and controlling blend morphology. The generality of this methodology demonstrated in current studies points to a new way of designing hybrid materials based on organic polymers and inorganic nanoparticles towards applications in modern electronic devices.