Photoelectrochmeical Cell Based on Natural Pigments and ZnO Nanoparticles
Getachew Yirga,
Sisay Tadesse,
Teketel Yohannes
Issue:
Volume 5, Issue 1, February 2016
Pages:
1-10
Received:
4 November 2015
Accepted:
12 November 2015
Published:
21 January 2016
Abstract: Natural pigments extracts from Bougainvillea spectabilis, Carissa Ovata, Hibiscus sabdariffa, Amarathus iresine herbisti, Beta vulgaris, are used as natural sensitizers for a dye sensitized solar cell (DSSC). ZnO nanoparticles were synthesized using sol-gel method and the size of the nanoparticle was determined using effective mass approximation model. Devices were Assembled using ZnO nanoparticles and natural sensitizers. DSSCs based on ZnO nanoparticles and ethanol extract of Amarathus iresine sensitizers have shown relatively better conversion efficiency of 0.039. Incident photon to current conversion efficiency (IPCE), short circuit current density (Jsc) and open circuit voltage (Voc) were measured for all the sensitizers.
Abstract: Natural pigments extracts from Bougainvillea spectabilis, Carissa Ovata, Hibiscus sabdariffa, Amarathus iresine herbisti, Beta vulgaris, are used as natural sensitizers for a dye sensitized solar cell (DSSC). ZnO nanoparticles were synthesized using sol-gel method and the size of the nanoparticle was determined using effective mass approximation mo...
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Dye-Sensitized Solar Cells Using Natural Dyes Extracted from Roselle (Hibiscus Sabdariffa) Flowers and Pawpaw (Carica Papaya) Leaves as Sensitizers
Eli Danladi,
Muhammad Sani Ahmad,
Maxwell Idodo,
Ezra Bako Danladi,
Francis Aungwa,
Sunday Habila Sarki
Issue:
Volume 5, Issue 1, February 2016
Pages:
11-15
Received:
30 January 2016
Accepted:
9 February 2016
Published:
24 February 2016
Abstract: Dye-sensitized solar cells (DSSCs) were fabricated using natural dyes extracted from roselle flowers and carica papaya leaves extract as photosensitizers. The photovoltaic perfomance of the DSSCs were evaluated under 100 mAcm-2 light intensity. The roselle (Hibiscus Sabdariffa) extract sensitized solar cell gave a short circuit current density (Jsc) of 0.180 mAcm-2, an open circuit voltage (Voc) of 0.470 V, a fill factor (FF) of 0.552, and an overall solar energy conversion efficiency (η) of 0.046%. Also, the pawpaw leaves extract sensitized cell gave a Jsc of 0.094 mAcm-2, Voc of 0.433 V, FF of 0.544 yielding a conversion efficiency of 0.022%. The cell sensitized by the roselle extract shows better sensitization, which was in agreement with the broadest spectrum of the extract adsorbed on TiO2 film. The sensitization performance related to interaction between the dye and TiO2 surface is discussed.
Abstract: Dye-sensitized solar cells (DSSCs) were fabricated using natural dyes extracted from roselle flowers and carica papaya leaves extract as photosensitizers. The photovoltaic perfomance of the DSSCs were evaluated under 100 mAcm-2 light intensity. The roselle (Hibiscus Sabdariffa) extract sensitized solar cell gave a short circuit current density (Jsc...
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