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Erschienen in:
07.09.2015
Mesopore-structured anatase-TiO2 thin films for the electron transport layer in inverted-type polymer solar cells
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 1/2016
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Abstract
Mesopore-structured TiO2 thin films for the electron transport layer in inverted-type polymer solar cells have been investigated. The mesopore structure with a diameter of ca. 25 nm was formed on fluorine-doped tin oxide/glass substrates by anodic oxidation. X-ray diffraction measurement reveals that anatase-type TiO2 was formed by the annealing at 500 °C in air. We found that the power conversion efficiency of the inverted-type polymer solar cells was improved by applying a filling process of the photovoltaic materials into the mesopores of TiO2. The power conversion efficiency of 1.58 % was obtained in the solar cell with a filling process for 60 min. The power conversion efficiency of the inverted polymer solar cells with electron transport layer of mesopore-structured TiO2 maintains 97 % of the maximum value even after light irradiation for 300 min.