Zinc oxide-based dye-sensitized solar cells using natural and synthetic sensitizers

Ossai, Amarachukwu N.; Alabi, Aderemi Babatunde; Ezike, Sabastine C.; Aina, Adebayo

doi:10.1016/j.crgsc.2020.100043

Cited by 34 publications

(7 citation statements)

References 35 publications

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“…Among the dye properties to consider are absorption coefficient and anchoring ability [11]. High absorption coefficient of dye means more light energy able to be absorbed per unit mass or thickness of the photoanode layer [12]. Plus, dyes with carbonyl or hydroxyl group are observed to attach well to metal oxide layers.…”

Section: Types Of Dyesmentioning

confidence: 99%

“…However, they are expensive and difficult to synthesise [2]. Natural dyes are cheap [5], easily available, completely biodegradable [12] and highly absorbent of UV light or infrared (IR) rays which compose a large range in the solar spectrum [3]. High efficiency natural dyes include chlorophyll, carotenoid, flavonoid and anthocyanin -chlorophyll especially so since it naturally absorbs ultraviolet (UV) and visible light [2].…”

Section: Types Of Dyesmentioning

confidence: 99%

“…Fabricated DSSCs using different types of dyes resulted in greatest η and output power for the dye with the highest absorbance or absorption coefficient [8][11] [12]. When two dyes of low absorbances are mixed, they add up and further increase overall efficiency because light can be absorbed across a wider spectrum of solar power [3].…”

Section: Effects Of Types Of Dyesmentioning

confidence: 99%

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Simulation of Dye-Sensitised Solar Cell with Mesoporous Zinc Oxide Layer of Different Thicknesses and with Dye-Sensitisers of Different Absorption Coefficients

Arumugam¹,

Low²,

Yeoh³

et al. 2022

Proceedings of the Multimedia University Engineering Conference (MECON 2022)

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Dye-sensitised solar cells (DSSCs) are an important part of research on renewable energy sources as they are less complicated to manufacture and cost less than several other types of solar cells. The performance of DSSC with a combination of mesoporous zinc oxide and natural dyes are simulated using COMSOL Multiphysics. Numerical expression of the electrical properties of a dye-sensitised solar cell is applied to a two-dimensional structure to form an electrical model. Optical properties of the natural dyes are then coupled with this electrical model. The variables tested are thickness of the photoanode layer and absorption coefficient of dyes. Efficiency of the simulated zinc oxide solar cell with N719 dye is 12.4%. Maximum power of 0.309 µW is obtained at a photoanode thickness of 600 nm with current density of 16.815 mA/cm 2 and voltage of 0.756 V. The natural dyes simulated are chlorophyll, betalain and anthocyanin. Of the three, the one with the highest absorption coefficient i.e., betalain resulted in the highest efficiency solar cell. The results were more favourable than several simulations studying titanium dioxide based DSSC.

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Section: Types Of Dyesmentioning

confidence: 99%

Section: Types Of Dyesmentioning

confidence: 99%

Section: Effects Of Types Of Dyesmentioning

confidence: 99%

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Simulation of Dye-Sensitised Solar Cell with Mesoporous Zinc Oxide Layer of Different Thicknesses and with Dye-Sensitisers of Different Absorption Coefficients

Arumugam¹,

Low²,

Yeoh³

et al. 2022

Proceedings of the Multimedia University Engineering Conference (MECON 2022)

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“…Furthermore, natural dyes unlike synthetic dyes are considered eco-friendly, as they are renewable and biodegradable. Consequently, natural dyes are used in the fabrication of solar cells to generate electricity [2,3]. In the early nineteen century, rapid research strides of the chemistry of natural dyes supported by the industrialization of Dye Sensitive solar Cells (DSSCs) production have led to the development of commercial solar cells in many countries of the world today which may likely push the present conventional electricity generation into oblivion.…”

Section: Introductionmentioning

confidence: 99%

Strategy to Select and Grade Efficient Dyes for Enhanced Photo-Absorption

et al. 2022

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In this paper, a simple strategy to select and grade efficient natural dye-sensitizers for photo-absorption is developed. The selection criteria help to choose efficient dye for construction of solar cell. On the other hand, the dye-grade technique based on light and matter interaction parameters (absorbance, anthocyanin, and light harvesting efficiency) further reduce the number of dyes for efficient dye-sensitized solar cell (DSSC) production. The result shows that the dyes extracted from witch seed flower (Striga hermonthica), flamboyant flower (Delonix regia), and bitter gourd (Momordica charantia) have dye-grade 1, are the most efficient photo-absorber for enhanced DSSC fabrication while guava peel dye has grade 10 being the least efficient dye. The selection criteria and dye-grade techniques provide surer way of getting promising dyes for effiective DSSC production than choosing the dyes randomly based on some features like their colors and abundance.

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“…Several methods have been employed in order to further improve the photocatalytic efficiency of ZnO, including dye sensitization, polymer modification, interface forming and others [12][13][14][15][16]. Perhaps the most popular method for tuning the properties of ZnO is doping [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Tuning the workfunction of ZnO through surface doping with Mn from first-principles simulations

Douloumis¹,

Vrithias²,

Katsarakis³

et al. 2022

Preprint

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Surface doping of ZnO allows for tailoring the surface chemistry of the material while preserving the superb electronic structure of the bulk. Apart from obvious changes in adsorption energies and activation energies for catalysis, surface doping can alter the workfunction of the material and allow it to be tuned for specific photocatalytic and optoelectronic applications. We present first-principles electronic structure calculations for surface doping of Mn on the ZnO (0001) surface. Various dopant concentrations have been considered at the out-most (surface) layer of Zn atoms, while the interior of the material is kept at the ideal wurtzite structure. For each system, the surface energy and surface workfunction have been calculated. Both workfunction and surface energy drop with increasing Mn concentration for O-terminated surfaces, while more complex behaviour is observed in metal-terminated ones. We discuss trends in surface stability and surface electronic structure of this material and how they affect its properties.

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Zinc oxide-based dye-sensitized solar cells using natural and synthetic sensitizers

Cited by 34 publications

References 35 publications

Simulation of Dye-Sensitised Solar Cell with Mesoporous Zinc Oxide Layer of Different Thicknesses and with Dye-Sensitisers of Different Absorption Coefficients

Simulation of Dye-Sensitised Solar Cell with Mesoporous Zinc Oxide Layer of Different Thicknesses and with Dye-Sensitisers of Different Absorption Coefficients

Strategy to Select and Grade Efficient Dyes for Enhanced Photo-Absorption

Tuning the workfunction of ZnO through surface doping with Mn from first-principles simulations

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