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Journal Articles Science Year : 2014

Exchanging Ohmic Losses in Metamaterial Absorbers with Useful Optical Absorption for Photovoltaics

Ankit Vora
  • Function : Author
Jephias Gwamuri
  • Function : Author
Nezih Pala
  • Function : Author
Anand Kulkarni
  • Function : Author
Joshua Pearce
  • Function : Author
  • PersonId : 922049
Durdu Güney
  • Function : Author
  • PersonId : 1046726

Abstract

Using metamaterial absorbers, we have shown that metallic layers in the absorbers do not necessarily constitute undesired resistive heating problem for photovoltaics. Tailoring the geometric skin depth of metals and employing the natural bulk absorbance characteristics of the semiconductors in those absorbers can enable the exchange of undesired resistive losses with the useful optical absorbance in the active semiconductors. Thus, Ohmic loss dominated metamaterial absorbers can be converted into photovoltaic near-perfect absorbers with the advantage of harvesting the full potential of light management offered by the metamaterial absorbers. Based on experimental permittivity data for indium gallium nitride, we have shown that between absorbance can be achieved in the semiconductor layers of the converted metamaterial absorbers. Besides other metamaterial and plasmonic devices, our results may also apply to photodectors and other metal or semiconductor based optical devices where resistive losses and power consumption are important pertaining to the device performance. Improvements in optical enhancement for solar photovoltaic (PV) devices using conventional natural materials has begun to show diminishing returns, yet metamaterials, which are rationally designed geometries of optical materials that can be tuned to respond to any region of the electromagnetic spectrum offer an opportunity to continue to improve solar device performance.
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Dates and versions

hal-02119695 , version 1 (04-05-2019)

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  • HAL Id : hal-02119695 , version 1

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Ankit Vora, Jephias Gwamuri, Nezih Pala, Anand Kulkarni, Joshua Pearce, et al.. Exchanging Ohmic Losses in Metamaterial Absorbers with Useful Optical Absorption for Photovoltaics. Science, 2014. ⟨hal-02119695⟩
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