Surface-Plasmon Enhanced Near-Bandgap Light Absorption in Silicon Photovoltaics
نویسندگان
چکیده
An extended Mie scattering theory is used in this paper to analyze the surface-plasmon enhanced light absorption in silicon for photovoltaic applications. The calculation results show that the optical absorption in silicon can be enhanced up to 50 times at resonance frequency by embedded spherical silver nanoparticles due to the local field enhancement by surface plasmons. The analysis reveals that the surface-plasmon field is concentrated in a spherical shell that encloses the particle. The enhancement reaches maximum when the thickness of the shell is 0.26 times the radius of the particle. The maximum absorption enhancement is found to be induced by silver particles with intermediate radii. The enhancement with larger particles is limited by the retardation effect, while the smaller-particle assisted absorption is hampered by electron scattering on the particle surface.
منابع مشابه
Surface plasmon enhanced silicon solar cells
Thin-film solar cells have the potential to significantly decrease the cost of photovoltaics. Light trapping is particularly critical in such thin-film crystalline silicon solar cells in order to increase light absorption and hence cell efficiency. In this article we investigate the suitability of localized surface plasmons on silver nanoparticles for enhancing the absorbance of silicon solar c...
متن کاملCombined micro- and nano-scale surface textures for enhanced near-infrared light harvesting in silicon photovoltaics.
As silicon photovoltaics evolve towards thin-wafer technologies, efficient optical absorption for the near-infrared wavelengths has become particularly challenging. In this work, we present a solution that employs combined micro- and nano-scale surface textures to increase light harvesting in the near-infrared for crystalline silicon photovoltaics, and discuss the associated antireflection and ...
متن کاملEnhanced optical absorption in organic solar cells using metal nano particles
In this study, for increasing absorption of the active layer in bulk hetero junction (BHJ) organic solar cells (OSCs) we used surface Plasmon effects of metal nano particles (MNPs). We embedded the MNPs inside the active layer and studied the device structure. For shown the results we investigated the model of our structure with Finite Difference Time Domain (FDTD) numerical method and achieved...
متن کاملEnhanced optical absorption in organic solar cells using metal nano particles
In this study, for increasing absorption of the active layer in bulk hetero junction (BHJ) organic solar cells (OSCs) we used surface Plasmon effects of metal nano particles (MNPs). We embedded the MNPs inside the active layer and studied the device structure. For shown the results we investigated the model of our structure with Finite Difference Time Domain (FDTD) numerical method and achieved...
متن کاملPseudo-direct bandgap transitions in silicon nanocrystals: effects on optoelectronics and thermoelectrics.
While silicon nanostructures are extensively used in electronics, the indirect bandgap of silicon poses challenges for optoelectronic applications like photovoltaics and light emitting diodes (LEDs). Here, we show that size-dependent pseudo-direct bandgap transitions in silicon nanocrystals dominate the interactions between (photoexcited) charge carriers and phonons, and hence the optoelectroni...
متن کامل