Complex epsilon-near-zero metamaterials for broadband light harvesting systems

Marcella Bonifazi; Yi Tian; Andrea Fratalocchi

doi:10.1117/12.2289977

16 February 2018 Complex epsilon-near-zero metamaterials for broadband light harvesting systems

Marcella Bonifazi, Yi Tian, Andrea Fratalocchi

Proceedings Volume 10527, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VII; 1052710 (2018) https://doi.org/10.1117/12.2289977
Event: SPIE OPTO, 2018, San Francisco, California, United States

Abstract

We engineered an epsilon-near-zero (ENZ) material from suitably disordered metallic nanostructures. We create a new class of dispersionless composite materials that efficiently harnesses white light. By means of Atomic Force Microscopy (AFM) and Photoluminescence (PLE) measurements we experimentally demonstrate that this nanomaterial increases up to a record value the absorption of ultra-thin light harvesting films at visible and infrared wavelengths. Moreover, we obtained a 170% broadband increase of the external quantum efficiency (EQE) when these ENZ materials are inserted in an energy-harvesting module. We developed an inexpensive electrochemical deposition process that enables large-scale production of this material for energy-harvesting applications.

Citation Download Citation

Marcella Bonifazi, Yi Tian, and Andrea Fratalocchi "Complex epsilon-near-zero metamaterials for broadband light harvesting systems", Proc. SPIE 10527, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VII, 1052710 (16 February 2018); https://doi.org/10.1117/12.2289977

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