Recent advances in optoelectronics are often based on thin-film organic semiconductors. Interesting organic semiconductors are given by squaraines, small molecules that show excitonic coupling with visible light and are thus suitable for applications in solar cells and light sensors. While such squaraine thin films have already been proven to be suitable for stimulation of neuronal model cells, the integration into, e.g., the human eye to support blind people necessitates forming thin layers on seamless substrates. Herein, squaraine films are spin-coated on electrospun nanofiber mats and nanomembranes, prepared from polyacrylonitrile, and made conductive by spin coating with poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS). The fibrous non-woven texture of the nanofiber mats and membranes alters the thin film formation of the squaraine compound considerably compared with preparation on planar, nonsoaking substrates such as glass and polyethylene terephthalate (PET) foil demanding further engineering regarding material's choice and processing conditions.

中文翻译：

---

用于无缝有机光电容传感器的光学指数匹配、柔性电纺基板

光电子学的最新进展通常基于薄膜有机半导体。有趣的有机半导体由方酸提供，小分子显示与可见光的激子耦合，因此适用于太阳能电池和光传感器。虽然此类方酸薄膜已被证明适用于刺激神经元模型细胞，但集成到例如人眼以支持盲人需要在无缝基材上形成薄层。在此，方酸薄膜旋涂在由聚丙烯腈制备的电纺纳米纤维垫和纳米膜上，并通过旋涂聚（3,4-亚乙基二氧噻吩）聚苯乙烯磺酸盐（PEDOT：PSS）使其导电。