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Updated: Aug 7, 2025
11:26
Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
Published on: September 12, 2014
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Visible-to-UV Photon Upconversion: Recent Progress in New Materials and Applications.
Masanori Uji1, Till J B Zähringer2, Christoph Kerzig2
1Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan.
Angewandte Chemie (International Ed. in English)
|March 7, 2023
Summary
Photon upconversion (UC) converts visible light to UV light, overcoming limitations of natural sunlight and artificial UV sources. Recent advances in triplet-triplet annihilation (TTA-UC) chromophores enable efficient UV generation for photochemical applications.
Area of Science:
- Photochemistry
- Materials Science
- Optics
Background:
- Ultraviolet (UV) light is crucial for photochemistry but scarce in solar spectrum.
- Artificial UV sources are inefficient and environmentally unfriendly.
- Photon upconversion (UC) offers a solution by converting visible light to UV light.
Purpose of the Study:
- To review recent advancements in visible-to-UV photon upconversion using triplet-triplet annihilation (TTA-UC).
- To highlight the development of novel chromophores for efficient TTA-UC.
- To discuss applications of TTA-UC in various photochemical processes.
Main Methods:
- Focus on triplet-triplet annihilation (TTA-UC) mechanisms.
- Development and characterization of new chromophores.
- Fabrication of chromophore-based films.
- Demonstration in photochemical applications.
Main Results:
- Significant progress in TTA-UC efficiency with new chromophores.
- Successful conversion of low-intensity visible light to UV light.
- Demonstrated utility in catalysis, bond activation, and polymerization.
Conclusions:
- Visible-to-UV TTA-UC is a promising technology for photochemical applications.
- Ongoing research focuses on material development and expanding applications.
- Future opportunities lie in enhancing efficiency and exploring new uses.
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