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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
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Increasing conversion efficiency of two-step photon up-conversion solar cell with a voltage booster hetero-interface
Shigeo Asahi1, Kazuki Kusaki2, Yukihiro Harada2
1Department of Electrical and Electronic Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe, 657-8501, Japan. asahis@people.kobe-u.ac.jp.
Scientific Reports
|January 19, 2018
Summary
Photon up-conversion enhances single-junction solar cell efficiency by reducing transmission losses. This method boosts output voltage and improves conversion efficiency through increased quasi-Fermi gap and photocurrent generation.
Area of Science:
- Renewable Energy Technologies
- Materials Science
- Photovoltaics
Background:
- Developing high-efficiency solar cells is crucial for renewable energy.
- Photon up-conversion is a promising technique to mitigate transmission losses in solar cells.
- Improving solar energy conversion efficiency remains a significant technological challenge.
Purpose of the Study:
- To analyze the impact of photon up-conversion on single-junction solar cell efficiency.
- To investigate how a hetero-interface can enhance output voltage via up-conversion.
- To demonstrate a pathway for increasing solar energy conversion efficiency.
Main Methods:
- Analysis of conversion efficiency in single-junction solar cells incorporating photon up-conversion.
- Modeling the effect of a hetero-interface on output voltage.
- Evaluating the correlation between quasi-Fermi gap, photocurrent generation, and overall efficiency.
Main Results:
- Photon up-conversion can significantly increase the conversion efficiency of single-junction solar cells.
- A hetero-interface effectively boosts the output voltage.
- Increased quasi-Fermi gap and substantial photocurrent generation are key factors for high efficiency.
Conclusions:
- Photon up-conversion is a viable strategy for enhancing solar cell performance.
- The integration of photon up-conversion with hetero-interfaces offers a promising route to higher solar energy conversion.
- Optimizing quasi-Fermi gap and photocurrent generation is essential for advanced solar cell design.
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