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Plasmonic Near-Field Absorbers for Ultrathin Solar Cells

Carl Hägglund ; S. Peter Apell (Institutionen för teknisk fysik, Kondenserade materiens teori)
Journal of Physical Chemistry Letters (1948-7185). Vol. 3 (2012), 10, p. 1275-1285.
[Artikel, refereegranskad vetenskaplig]

If the active layer of efficient solar cells could be made 100 times thinner than in today's thin film devices, their economic competitiveness would greatly benefit. However, conventional solar cell materials do not have the optical capability to allow for such thickness reductions without a substantial loss of light absorption. To address this challenge, the use of plasmon resonances in metal nanostructures to trap light and create charge carriers in a nearby semiconductor material is an interesting opportunity. In this Perspective, recent progress with regards to ultrathin (similar to 10 nm) plasmonic nanocomposites is reviewed. Their optimal internal geometry for plasmon near-field induced absorption is discussed, and a zero thickness effective medium representation is used to optimize stacks including an Al back reflector for photovoltaics. This shows that high conversion efficiencies (>20%) are possible even when taking surface scattering effects and thin passivating layers inserted between the metal and semiconductor into account.

Nyckelord: charge-carrier generation, atomic layer deposition, absorption, enhancement, optical-constants, nanoparticles, light, film, particle, 2d-photovoltaics, photovoltaics

Denna post skapades 2012-06-20. Senast ändrad 2014-03-24.
CPL Pubid: 159230


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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kondenserade materiens teori (1900-2015)


Teknisk fysik

Chalmers infrastruktur