The performance of conjugated polymer (CP)-based electronic devices relies on optimal charge carrier mobilities, which are determined by monomeric architecture, degree of polymerization, chain conformation, and the nano- and mesoscale morphologies. With regard to the latter, we discuss two effects that have received limited attention in the literature, yet important for device performance optimization: (1) the role of morphological disorder and of CP/substrate interactions on the in-plane and out-of-plane carrier transport in CPs; (2) the impact of morphological disorder on charge transfer at the CP/substrate interface. The emergence of film thickness-dependent carrier mobilities, varying over two orders of magnitude within a length scale of 200 nm, and band-bending phenomena, extending tens of nanometers within the CP, are associated with these effects. These findings suggest areas for further research in order to enable widespread applications of next-generation CP-based devices. Graphical abstract

中文翻译：

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共轭聚合物薄膜中的电荷载流子传输：形态和聚合物/基材相互作用的影响

基于共轭聚合物 (CP) 的电子器件的性能依赖于最佳电荷载流子迁移率，这取决于单体结构、聚合度、链构象以及纳米和中尺度形态。关于后者，我们讨论了在文献中受到有限关注但对器件性能优化很重要的两种影响：（1）形态无序和 CP/衬底相互作用对平面内和平面外的作用CP 中的飞机航母运输；(2) 形态无序对CP/衬底界面电荷转移的影响。出现了依赖于薄膜厚度的载流子迁移率，在 200 nm 的长度范围内变化超过两个数量级，以及在 CP 内延伸数十纳米的带弯曲现象，与这些影响有关。这些发现提出了进一步研究的领域，以实现下一代基于 CP 的设备的广泛应用。图形概要