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Synergistic Effect of Size-Tailored Structural Engineering and Postinterface Modification for Highly Efficient and
Haoran Zhou1,2, Hyun Jae Lee3, Masud1
1Global GET-Future Lab. & Department of Advanced Materials Chemistry, Korea University, Sejong 339-700, Korea.
ACS Applied Materials & Interfaces
|September 11, 2023
Summary
Optimizing dye-sensitized solar cell (DSSC) interfaces with surface-coating adsorbents significantly reduces charge recombination. This breakthrough enhances light harvesting and boosts power conversion efficiency (PCE) for practical solar energy applications.
Area of Science:
- Materials Science
- Renewable Energy
- Nanotechnology
Background:
- Dye-sensitized solar cells (DSSCs) show promise but haven't reached theoretical efficiency limits.
- Improving device fabrication and interfacial engineering is critical for DSSC advancement.
- Optimizing the dye-TiO2 nanoparticle interface is key to reducing charge recombination and enhancing light harvesting.
Purpose of the Study:
- To develop a surface-coating adsorbent strategy for controlling the TiO2 nanoparticle interface.
- To achieve the radiative limit of power conversion efficiency (PCE) in DSSCs.
- To enhance light-harvesting properties and reduce charge recombination.
Main Methods:
- Utilized 2-thiophenecarboxylic acid (THCA) and chenodeoxycholic acid (CDCA) as post-interfacial surface-coating adsorbents.
- Engineered coadsorbent structure and optimized the TiO2 nanoparticle interface.
- Implemented a monolayer adsorption process for improved surface coverage.
Main Results:
- Achieved a PCE over 13.17% for a single porphyrin dye-based DSSC, the highest reported.
- Demonstrated a PCE of 9.04% for a large-area DSSC (3 cm²).
- Recorded a PCE of 11.16% for quasi-solid-state DSSCs with polymer gel electrolytes, showing 1000 h stability.
Conclusions:
- Surface-coating adsorbents effectively control the TiO2 nanoparticle interface, enhancing PCE.
- The developed method offers a practical approach to high-performance DSSCs.
- These findings present viable alternatives to conventional power sources.
