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Hybrid Si nanocones/PEDOT:PSS solar cell
Hao Wang1, Jianxiong Wang1, ᅟ Rusli2
1Novitas, Nanoelectronics Centre of Excellence, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798 Singapore.
Nanoscale Research Letters
|May 16, 2015
Summary
Periodic silicon nanocones enhance light trapping in solar cells. The highest power conversion efficiency of 7.1% was achieved with a 400-nm periodicity, demonstrating improved performance over planar silicon substrates.
Area of Science:
- Materials Science
- Nanotechnology
- Renewable Energy
Background:
- Silicon nanocones (SiNCs) offer potential for improved light absorption in solar cells.
- Nanostructure fabrication is key to optimizing photovoltaic device performance.
Purpose of the Study:
- To fabricate and characterize periodic silicon nanocones (SiNCs) for hybrid solar cells.
- To investigate the effect of SiNC periodicity on optical, electrical, and photovoltaic properties.
- To understand the light trapping capabilities of SiNCs.
Main Methods:
- Fabrication of SiNCs using dry etching with polystyrene nanospheres as a mask.
- Creation of hybrid silicon/PEDOT:PSS solar cells.
- Optical, electrical, and photovoltaic characterization.
- Finite element method for theoretical optical simulation.
Main Results:
- SiNCs exhibit superior light trapping compared to planar silicon.
- Power conversion efficiency (PCE) decreases as SiNC periodicity increases.
- A PCE of 7.1% was achieved for SiNCs with 400-nm periodicity.
- Optimal periodicity balances light trapping and current collection.
Conclusions:
- Periodic silicon nanocones significantly enhance light trapping in solar cells.
- Optimizing SiNC periodicity is crucial for maximizing solar cell efficiency.
- The 400-nm periodicity SiNC hybrid solar cell demonstrates promising performance.
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