Carbon nanotubes are versatile applicable. They can be used within measurement instrumentations (as tips for scanning tunneling microscopy), displays (as component for flat and luminous field emission screens) and for the enhancement of synthetic materials (improvement of their mechanical behavior). Furthermore, there are transistors and accumulators made out of carbon nanotubes (CNT). Due to the versatility and the achievements of CNTs, it is also interesting to manufacture nanotubes and -fibers out of different materials. Martin Steinhart et al. succeeded to fabricate nanotubes and nanofibers out of various polymer materials by template wetting [1-3]. The template wetting is affected by the basic principles of surface coating/wetting and capillarity. The wetting emerges when low-energy liquids like polymer solutions or melts interact with porous substrates with high surface energies like aluminum oxide membranes (AAO) or macro-porous silicon. After wetting of the membrane walls, the nanotubes or –fibers need to cure before removing the template with sodium hydroxide (when using AAO) or acid. With help of the template wetting method, it is also possible to manufacture nanofibers and –tubes out of classical bulk-heterojunction solar cell materials (PCBM: Pheny-C61-butyric acid methyl ester and P3HT: Poly(3-hexylthiophene-2,5-diyl)). Therefore a device has been developed, which should be introduced in this paper (Figure 1a)). With this element (Vacuum-supported Suction-System, VSS) [4], it is also possible to synthesize Core-Shell-nanotubes, it can be used with educt melts as well as educt solutions. Assemblies of well-defined, uniform and almost defect free nanotubes can be synthesized by this method. The VSS facilitates a simple fabrication of nanotubes filled with nanoparticles. Also PCBM/P3HT-Core-Shell-nanotubes are synthesized in this way (Figure 1 b) & c)) and are prepared and optimized for the application within Bulk-Heterojunction solar cells. Figure 1: a) Layout of vacuum-supported suction-system, VSS [4], b & c) TEM-images of Core (PCBM, red)-Shell-(P3HT, white)-nanotubes [4]