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Artificial hemes for DSSC and/or BHJ applications.

Kalliopi Ladomenou1, Vasilis Nikolaou1, Georgios Charalambidis1

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Dalton Transactions (Cambridge, England : 2003)
|December 15, 2015
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Summary

Researchers improved solar energy conversion devices by synthesizing novel porphyrin-based materials for dye-sensitized solar cells (DSSCs) and bulk heterojunctions (BHJs). These advancements enhance light absorption and power conversion efficiency in organic solar cells.

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Organic Electronics

Background:

  • Solar energy conversion devices are crucial for sustainable energy. Porphyrins, inspired by photosynthesis, are key light-harvesting materials for dye-sensitized solar cells (DSSCs) and bulk heterojunctions (BHJs).
  • Improving the power conversion efficiency (PCE) of these organic solar cells is an ongoing research objective.

Purpose of the Study:

  • To review developments in porphyrin hybrid derivatives for enhancing DSSC and BHJ performance.
  • To explore functionalized porphyrins with varied anchoring groups (carboxylic acid, pyridyl) to extend light absorption and boost PCE.
  • To investigate strategies for reducing dye aggregation and optimizing photovoltaic properties.

Main Methods:

  • Synthesis of monomeric, dimeric, and trimeric porphyrins with carboxylic acid and pyridyl anchoring groups.
  • Incorporation of additional chromophores and investigation of different anchoring group effects.
  • Application of chemical co-adsorbents, co-sensitization, modified photoanodes, and electrolyte additives to mitigate dye aggregation.
  • Utilizing synthesized porphyrins as electron donors in solution-processed BHJ organic solar cells.

Main Results:

  • Functionalized porphyrins with carboxylic acid anchoring groups were synthesized to broaden light absorption and improve solar cell performance.
  • Porphyrins with pyridyl anchoring groups were studied to assess their impact on PCE.
  • Photovoltaic properties were enhanced through strategies like reducing dye aggregation with co-adsorbents and employing co-sensitization.
  • Optimized porphyrin derivatives were successfully used in BHJ organic solar cells.

Conclusions:

  • Porphyrin hybrid derivatives offer significant potential for improving the efficiency of DSSCs and BHJs.
  • Strategic functionalization and optimization techniques are effective in enhancing the performance of organic solar cells.
  • Further research into porphyrin-based materials can lead to more efficient and viable solar energy solutions.