Related Experiment Video
Updated: May 29, 2026
10:31
Developing High Performance GaP/Si Heterojunction Solar Cells
Published on: November 16, 2018
High-performance silicon nanowire array photoelectrochemical solar cells through surface passivation and modification
Xin Wang1, Kui-Qing Peng, Xiao-Jun Pan
1Department of Physics and College of Nuclear Science and Technology, Beijing Normal University, China.
Angewandte Chemie (International Ed. in English)
|September 10, 2011
Summary
Platinum nanoparticle-decorated carbon/silicon core/shell nanowire solar cells achieve 10.86% efficiency. These photoelectrochemical devices demonstrate excellent stability in harsh electrolytes, offering a promising advancement in solar energy conversion.
Area of Science:
- Materials Science
- Renewable Energy
- Nanotechnology
Background:
- Photoelectrochemical (PEC) solar cells offer a promising route for renewable energy generation.
- Developing efficient and stable PEC devices, particularly those based on nanowire architectures, remains a key challenge.
- Core/shell nanowire structures can enhance light absorption and charge separation, but surface passivation and interfacial engineering are critical.
Purpose of the Study:
- To develop and evaluate the performance of platinum nanoparticle (PtNP)-decorated carbon/silicon (C/Si) core/shell nanowire photoelectrochemical solar cells.
- To investigate the impact of carbon coating for surface passivation and PtNP decoration for enhanced interfacial charge transfer on device efficiency and stability.
- To assess the operational stability of these novel solar cells under simulated solar illumination in aggressive electrolytes.
Main Methods:
- Fabrication of C/Si core/shell nanowires via established deposition techniques.
- Decoration of nanowires with platinum nanoparticles (PtNPs) using controlled methods.
- Assembly of nanowire photoanodes into photoelectrochemical solar cells.
- Performance characterization under 1-sun AM 1.5 G illumination, including efficiency measurements and long-term stability tests in aggressive electrolytes.
Main Results:
- Achieved a high power conversion efficiency (PCE) of 10.86% for the PtNP-decorated C/Si core/shell nanowire solar cells.
- Demonstrated excellent device stability, maintaining performance over extended periods in aggressive electrolyte conditions.
- Attributed superior performance to effective surface passivation by the carbon coating and enhanced interfacial charge transfer facilitated by PtNPs.
Conclusions:
- PtNP-decorated C/Si core/shell nanowire photoelectrochemical solar cells represent a significant advancement in solar energy technology.
- Carbon coating provides crucial surface passivation, while PtNPs enhance charge transfer, leading to high efficiency and stability.
- These findings highlight the potential of engineered nanowire architectures for robust and efficient solar energy harvesting.
