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Moth-eye Structured Polydimethylsiloxane Films for High-Efficiency Perovskite Solar Cells
Min-Cheol Kim1,2, Segeun Jang3, Jiwoo Choi1,2
1Global Frontier Center for Multiscale Energy Systems, Seoul National University, Seoul, 151-744, Republic of Korea.
Nano-Micro Letters
|June 17, 2021
Summary
Moth-eye patterned polydimethylsiloxane (PDMS) films enhance perovskite solar cell efficiency by reducing reflection. These films also enable tunable coloration for building-integrated photovoltaics.
Area of Science:
- Materials Science
- Renewable Energy
Background:
- Perovskite solar cells (PSCs) offer high efficiency but require optical enhancements.
- Minimizing light reflection is crucial for maximizing PSC performance.
Purpose of the Study:
- To fabricate large-area polydimethylsiloxane (PDMS) films with moth-eye structures for PSCs.
- To investigate the effect of moth-eye structure size on optical properties and device efficiency.
Main Methods:
- Photolithography and bilayer PDMS deposition were used for fabrication.
- Moth-eye PDMS films were attached to transparent substrates of PSCs.
- Structure sizes were varied to tune optical properties.
Main Results:
- A 300-nm moth-eye PDMS film enhanced power conversion efficiency to ~21% via antireflection.
- 1000-nm moth-eye PDMS films exhibited coloration due to optical interference and diffraction.
- The moth-eye structures effectively reduced surface reflection.
Conclusions:
- Moth-eye PDMS films are a viable method to boost PSC efficiency.
- This technology holds potential for building-integrated photovoltaics with tunable aesthetics.
