Zhou, Y.Y.ZhouRiehle, F.S.F.S.RiehleYuan, Y.Y.YuanSchleiermacher, Hans-FriederHans-FriederSchleiermacherNiggemann, M.M.NiggemannUrban, G.A.G.A.UrbanKrüger, M.M.Krüger2022-03-042022-03-042010https://publica.fraunhofer.de/handle/publica/22124810.1063/1.3280370We report on bulk-heterojunction hybrid solar cells based on blends of non-ligand-exchanged CdSe quantum dots (QDs) and the conjugated polymer poly(3-hexylthiophene) with improved power conversion efficiencies of about 2% under AM1.5G illumination after spectral mismatch correction. This is the highest reported value for a spherical CdSe QD based photovoltaic device. After synthesis, the CdSe QDs are treated by a simple and fast acid-assisted washing procedure, which has been identified as a crucial factor in enhancing the device performance. A simple model of a reduced ligand sphere is proposed explaining the power conversion efficiency improvement.enSolarthermie und OptikFarbstoffOrganische und Neuartige SolarzellenAlternative Photovoltaik-TechnologienPhotonenmanagementFarbstoff und Organische Solarzellen621journal article