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Updated: Feb 2, 2026
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
13.1K
Coupled double triplet state in singlet fission.
Hyungjun Kim1, Paul M Zimmerman
1Department of Chemistry, Incheon National University, Incheon 22012, Republic of Korea. kim.hyungjun@inu.ac.kr.
Physical Chemistry Chemical Physics : PCCP
|November 29, 2018
Summary
The coupled, double triplet state, or 1(TT), is crucial for singlet fission in organic solar cells. Recent advances in theory and experiment clarify its properties and applications.
Area of Science:
- Quantum mechanics
- Materials science
- Organic electronics
Background:
- The 1(TT) state is a coupled, double triplet multiexcitonic state.
- Its transient nature and similarity to independent triplets pose characterization challenges.
- Recent theoretical and experimental progress has enhanced understanding of 1(TT).
Purpose of the Study:
- To review recent advancements in understanding the 1(TT) state.
- To discuss formation mechanisms, spectroscopic signatures, and intertriplet interactions.
- To explore the role of 1(TT) in singlet fission for organic solar cells.
Main Methods:
- Theoretical modeling of quantum transitions.
- Experimental spectroscopy to identify 1(TT) signatures.
- Analysis of singlet fission processes in organic semiconductors.
Main Results:
- Clarification of 1(TT) formation from single-photon bright states.
- Detailed understanding of intertriplet coupling strengths.
- Identification of strategies for efficient charge carrier extraction using 1(TT).
Conclusions:
- The 1(TT) state plays a central role in singlet fission for organic solar cells.
- Understanding 1(TT) enables control over complex quantum states.
- Potential applications extend beyond solar cells to other advanced technologies.
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