In this work, the effects of island-shaped spin detectors and interlayers on spin pumping and the inverse spin-Hall-effect in NM/FM and NM/IL/FM structures are investigated. The used methods are ferromagnetic resonance (FMR) and inverse spin-Hall (ISH) voltage measurement. The first part of the thesis examines the effects of a non-uniform, thin-film Sr2RuO4 layer on YIG, which acts as an example of a non-continuous spin-detector deposited on a magnetic layer. It is shown that the spin pumping and the ISH-voltage differ significantly from uniform thin-film spin detectors, depending on the density of islands. In the second part of the thesis, a layer grown as islands is deposited between a homogeneous spin detector and a spin injector. The fact that both the island surface coverage and the geometry of the interlayer islands have a significant influence of the spin pumping and the measured ISH-voltage, due to a change in the pumped spin current vector, is exemplified by the layer systems Pt/C60/YIG and Pt/DH4T/YIG. Based on the presented characterizations, a model is developed which qualitatively reproduces the shown damping constants and ISH voltages.