Spectrally-selective Photovoltaics via Photonic Band Engineering in Absorbing Media
2019 IEEE 46th Photovoltaic Specialists Conference (PVSC)(2019)
摘要
Spectral selectivity is of interest for many photovoltaic applications, such as in multijunction and transparent solar cells, where wavelength-selectivity of the photoactive material is necessary. We investigate using artificial photonic band engineering as a method for achieving spectral selectivity in an absorbing material such as PbS CQD thin films. Using FDTD simulations, we find that a CQD-based photonic crystal (CQD-PC) is able to maintain its photonic band structure, including the existence of a reduced photonic density of states, in the presence of weak material absorption. This shows that CQD-PCs are a promising material for photovoltaic applications that require spectral selectivity.
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关键词
spectral selectivity,photonic crystals,colloidal quantum dots,thin film material,photovoltaics
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