Hendrik Holscher

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Grain boundaries in the Cu(In, Ga)Se<inf>2</inf> absorber layer are investigated applying Kelvin probe force microscopy. Potential distributions at grain boundaries on the absorber surface and on untreated cross section of the solar cell are compared. Depending on potential variation, three types of grain boundaries can be classified at the absorber(More)
Thin-film solar cells that are based on Cu(In,Ga)Se<inf>2</inf> (CIGS) absorbers with Ga/(Ga+In)-ratios from 0 to 1 are fabricated, and their optical and electrical properties are investigated by macroscopic (current density-voltage, external quantum efficiency) and microscopic (Kelvin probe force microscopy on untreated cross sections of solar cells)(More)
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