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AuthorShikoh A.S.
AuthorAhmad Z.
AuthorTouati F.
AuthorAl-Muhtaseb S.A.
Available date2019-10-17T07:44:39Z
Publication Date2018
Publication NameOptical Materials
AbstractThis paper deals with the electrical, optical and electrochemical properties of a metal-free dye C78H74O8 (AS-2), which has been used to improve the photo-detection properties of C58H86N8O8RuS2 (N719) based Dye sensitized photo-sensors (DSPSs). Both dyes were mixed together in various proportions and the most promising ratio N719/AS-2 (1:0.25) was selected for staining photo-anodes for DSPS integration. The fabricated DSPSs were studied in terms of electrical parameters and photodetection properties. The N719/AS-2 (1:0.25) based DSPS were found to have a reduced leakage current, increased breakdown voltage and a closer proximity to an ideal diode, as compared to the N719 based DSPS. Further, the N719/AS-2 (1:0.25) based DSPS was also found to have better linearity at high irradiance levels, thus rendering the co-sensitized device useful as a photosensor in various applications. Electrochemical Impedance Spectroscopy (EIS) analysis was also performed to explain the interfacial charge recombination process. - 2018 Elsevier B.V.
SponsorThis publication was made possible by NPRP grants ( NPRP 5-546-2-222 ) and ( NPRP 6-175-2-070 ) from Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors. We acknowledge Professor Mohammad Khaja Nazeeruddin at Group for Molecular Engineering of Functional Materials, Ecole Polytechnique F�d�rale de Lausanne (EPFL) Switzerland for supplying the AS-2 sensitizer.
PublisherElsevier B.V.
SubjectDye sensitized photo sensor
SubjectDye sensitized solar cells
SubjectElectrochemical impedance spectroscopy
TitleEnhancement of electrical and optical performance of N719 by co-sensitization
Volume Number78

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