Markus Koini

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The formation of crystalline para-sexiphenyl (6P) films on Cu(110) and Cu(110)-(2 × 1)O (Cu-O) has been studied by low energy electron diffraction, X-ray absorption spectroscopy and both in situ and ex situ X-ray diffraction methods to elucidate the transition from the initial monolayers to crystalline thin films. It is found that, for Cu-O, a single and,(More)
In high power density single-phase PV inverter systems, active auxiliary circuits are installed, shifting the double line-frequency power pulsation away from the dc link to a dedicated buffer capacitor. Being relieved from strict voltage ripple requirements, a larger voltage ripple is allowed at the buffer capacitor, significantly reducing the capacitance(More)
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