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Related Experiment Video

Updated: Feb 25, 2026

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
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Increased upconversion performance for thin film solar cells: a trimolecular composition.

Yuen Yap Cheng1, Andrew Nattestad2, Tim F Schulze3

  • 1School of Chemistry , UNSW , Sydney , NSW 2052 , Australia . Email: timothy.schmidt@unsw.edu.au ; Tel: +61 439 386 109.

Chemical Science
|August 10, 2017
PubMed
Summary
This summary is machine-generated.

Photochemical upconversion using triplet-triplet annihilation (TTA-UC) boosts solar cell efficiency. A dual-emitter system achieved record photocurrent enhancement in amorphous silicon and dye-sensitized solar cells.

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Photochemistry

Background:

  • Thin-film solar cells like a-Si:H and DSCs have limitations in capturing sub-bandgap photons.
  • Photochemical upconversion (UC) offers a route to harvest and utilize this transmitted light.
  • Triplet-triplet annihilation based UC (TTA-UC) is a promising technique for enhancing solar energy conversion.

Purpose of the Study:

  • To enhance the short-circuit currents of a-Si:H and DSC devices using TTA-UC.
  • To investigate the performance of a dual-emitter TTA-UC system for improved UC quantum yields.
  • To establish new records for photocurrent enhancement in TTA-UC systems and upconversion-enhanced solar cells.

Main Methods:

  • Implementation of a dual-emitter TTA-UC system to harvest transmitted sub-bandgap photons.
  • Integration of the TTA-UC system with hydrogenated amorphous silicon (a-Si:H) and dye-sensitized solar cells (DSCs).
  • Measurement and analysis of photocurrent enhancement under solar irradiation.

Main Results:

  • Achieved record photocurrent enhancement values for both a-Si:H and DSC devices.
  • Surpassed 10^-3 mA cm^-2 sun^-2 photocurrent enhancement, a first for TTA-UC systems.
  • Demonstrated significantly improved UC quantum yields with the dual-emitter system compared to single-emitter systems.

Conclusions:

  • The dual-emitter TTA-UC system significantly enhances solar cell performance.
  • Record photocurrent enhancements were achieved, marking a milestone for upconversion-enhanced solar cells.
  • Further development is needed to address challenges for viable device application of TTA-UC technology.