Elyes Nefzaoui, Jérémie Drevillon, Karl Joulain
Among several solutions to exploit solar energy, thermophotovoltaics (TPV)
have been popularized and have known great breakthroughs during the past two
decades. Yet, existing systems still have low efficiencies since the wavelength
range of optimal photovoltaic (PV) conversion is very small compared to the
emitter spectral range. Selective emitters are a very promising solution to
this problem. We developed numerical tools to design and optimize such
emitters. Some of the resulting structures composed of two or four layers of
metals and semiconductors are presented in this paper. We also show that the
usual PV devices efficiency limits (30% for crystalline silicon under solar
radiation, according to Shockley-Queisser model) can be easily overcome thanks
to these structures.
View original:
http://arxiv.org/abs/1202.3350
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