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

Marcella Bonifazi, Yi Tian, Andrea Fratalocchi

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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.
Original languageEnglish (US)
Title of host publicationPhysics, Simulation, and Photonic Engineering of Photovoltaic Devices VII
PublisherSPIE-Intl Soc Optical Eng
ISBN (Print)9781510615397
StatePublished - Feb 17 2018


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