Browsing by Author "Mehmood, Umer"
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Enhanced photovoltaic performance of dye-sensitized solar cells using TiO2-graphene microplatelets hybrid photoanode
Mehmood, Umer; Harrabi, Khalil; Hussein, Ibnelwaleed A.; Ahmed, Shakeel ( IEEE Electron Devices Society , 2016 , Article)Hybrid photoanodes for dye-sensitized solar cells (DSSCs) were prepared by simple addition of graphene (GR) microplatelets to TiO 2 nanoparticulate paste. Transmission electron microscopy was used to confirm the presence ... -
Enhanced photovoltaic performance with co-sensitization of a ruthenium(ii) sensitizer and an organic dye in dye-sensitized solar cells
Mehmood, Umer; Hussein, Ibnelwaleed A.; Harrabi, Khalil; Tabet, Nouar; Berdiyorov, G. R. ( Royal Society of Chemistry , 2016 , Article)Co-sensitization is demonstrated to be an effective technique to enhance the efficiency of dye-sensitized solar cells, where an efficiency of 9.23% is achieved by mixing N3 and RK-1 dyes. The assembled solar cells are ... -
Enhancing Power Conversion Efficiency of Dye-Sensitized Solar Cell Using TiO2-MWCNT Composite Photoanodes
Mehmood, Umer; Hussein, Ibnelwaleed A.; Al-Ahmed, Amir; Ahmed, Shakeel ( IEEE Electron Devices Society , 2016 , Article)The aim of this work is to improve the power conversion efficiency (PCE) of dye-sensitized solar cells (DSSCs) using composite films consisting of titanium oxide (TiO2) nanoparticles and multiwalled carbon nanotubes (MWCNTs). ... -
Improvement in Photovoltaic Performance of Dye Sensitized Solar Cell Using Activated Carbon-TiO2 Composites-Based Photoanode
Mehmood, Umer; Aslam, M. Zaheer; Shawabkeh, R. A.; Hussein, Ibnelwaleed A.; Ahmad, Waqar; Rana, Adeem Ghaffar... more authors ... less authors ( IEEE Electron Devices Society , 2016 , Article)In this study, the activated carbon (AC) is synthesized from the oil fly ash (FA). Noncarbonaceous impurities were eliminated by acidic treatment of oil FA. Brunauer-Emmett-Teller and scanning electron microscopy ...