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Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
Published on: September 12, 2014
Click chemistry-driven heteromolecular integration into layered zeolite frameworks for photochemical upconversion
Fuminao Kishimoto1, Kyohei Hisano2, Toru Wakihara1,3
1Department of Chemical System Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan. kfuminao@chemsys.t.u-tokyo.ac.jp.
Researchers developed novel organic-inorganic hybrid materials for triplet-triplet annihilation upconversion (TTA-UC). These materials efficiently convert light, showing promise for advanced photochemical applications.
Area of Science:
- Materials Science
- Photochemistry
- Nanotechnology
Background:
- Triplet-triplet annihilation upconversion (TTA-UC) is a key process for light conversion.
- Organic-inorganic hybrid materials offer tunable properties for advanced applications.
Purpose of the Study:
- To develop novel organic-inorganic hybrid layered porous materials for efficient TTA-UC.
- To integrate anthracene-based emitters and metal-complex sensitizers within zeolitic nanospace.
Main Methods:
- Covalent anchoring of diphenylanthracene (DPA) units between MWW-type layers via thiol-ene click chemistry.
- Incorporation of cationic chromophores and platinum(octaethylporphyrin) [Pt(OEP)] as sensitizers.
- Characterization using X-ray diffraction (XRD) and N2 adsorption.
Main Results:
- Formation of ordered interlayer micropores within the hybrid material.
- Efficient intermolecular energy transfer facilitated by Pt(OEP).
- Observed phosphorescence at 650 nm and upconverted emission at 400-500 nm upon 535 nm excitation.
Conclusions:
- A rational strategy for tuning nanoscale photochemical behavior in layered hybrid systems was demonstrated.
- Host-guest engineering in zeolitic nanospaces is effective for developing TTA-UC materials.
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