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Updated: May 5, 2026

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
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Exploiting quantum interference in dye sensitized solar cells.

Emanuele Maggio1, Gemma C Solomon, Alessandro Troisi

  • 1Chemistry Department & Centre of Scientific Computing, University of Warwick , Coventry CV4 7AL, United Kingdom.

ACS Nano
|November 29, 2013
PubMed
Summary
This summary is machine-generated.

Researchers developed a strategy to reduce charge recombination in dye-sensitized solar cells using a cross-conjugated bridge. This approach enhances solar cell efficiency by controlling electron transfer pathways.

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Area of Science:

  • Materials Science
  • Physical Chemistry
  • Renewable Energy

Background:

  • Charge recombination is a major loss mechanism in dye-sensitized solar cells (DSSCs).
  • Modulating charge transport across nanostructures is crucial for improving solar cell performance.
  • The TiO2 (anatase)-chromophore interface is a key component in DSSCs.

Purpose of the Study:

  • To develop a strategy to hinder charge recombination in DSSCs.
  • To investigate the role of a cross-conjugated bridge in controlling electron transfer.
  • To understand how molecular design can suppress charge recombination.

Main Methods:

  • Theoretical modeling of nonadiabatic electron transfer.
  • Inclusion of bridge states mediating the electron transfer process.
  • Density Functional Theory (DFT) calculations on realistic molecular systems.
  • Tight-binding calculations to support atomistic simulations.

Main Results:

  • A cross-conjugated fragment in the bridge can suppress charge recombination via negative interference.
  • Recombination lifetime is tunable by altering the electron-withdrawing/donating character of bridge substituents.
  • DFT calculations confirm the modulation of recombination lifetime through molecular modifications.

Conclusions:

  • A novel strategy utilizing cross-conjugated bridges effectively suppresses charge recombination in DSSCs.
  • Molecular engineering of the bridge offers a pathway to optimize electron transfer and enhance solar cell efficiency.
  • The findings provide insights into designing advanced materials for photovoltaic applications.