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Light Trapping in Commercial Silicon Solar Cell Structures Using Silver Nano Particles
M. Mathew
Spectral Response, Silicon Solar Cell(s), Photovoltaics, Nanoparticles, Plasmonics
New Materials and Concepts for Photovoltaic Devices
Subtopic: New Materials and Concepts for Cells and Modules
Event: 36th European Photovoltaic Solar Energy Conference and Exhibition
Session: 1BV.3.33
71 - 73
ISBN: 3-936338-60-4
Paper DOI: 10.4229/EUPVSEC20192019-1BV.3.33
0,00 EUR
Document(s): paper


This paper explores the design and realization of plasmonic structures to enhance near bandgap solar light absorption in standard industrial crystalline silicon solar cells. Silver nanoparticles were integrated at the front side of standard textured commercial crystalline silicon solar cells to exploit the large optical cross sections of surface plasmon resonance of nanoparticles. This could provide effective light trapping near the band gap of silicon. The silver nanoparticles were deposited on silicon solar cells by simple industrially adaptable process; by sputtering a thin film of silver and followed by annealing treatment at relatively lower temperatures. Different annealing processes were adapted to vary the surface coverage of the plasmonic nanoparticle arrays. We have observed that increasing the size and surface coverage of nanoparticles of noble metals shifts the maximum of the collective SPR band toward longer wavelengths. Metal-island size and surface coverage was varied by varying the deposition and annealing conditions used to produce the metal-island film. The scanning electron microscopy analysis showed that the nano particles were uniformly distributed even on textured surface of silicon solar cell. By the incorporation surface plasmonic effect we observed a decrease in reflectance and enhancement in external quantum efficiency (EQE) at longer wavelength region.