Spectral splitting photovoltaics using perovskite and wideband dye-sensitized solar cells

Takumi Kinoshita, Kazuteru Nonomura, Nam Joong Jeon, Fabrizio Giordano, Antonio Abate, Satoshi Uchida, Takaya Kubo, Sang Il Seok (), Mohammad Khaja Nazeeruddin, Anders Hagfeldt, Michael Grätzel () and Hiroshi Segawa ()
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Takumi Kinoshita: Research Center for Advanced Science and Technology (RCAST), The University of Tokyo
Kazuteru Nonomura: Laboratory of Photomolecular Science, Swiss Federal Institute of Technology
Nam Joong Jeon: Korea Research Institute of Chemical Technology
Fabrizio Giordano: Laboratory of Photonics and Interfaces, Swiss Federal Institute of Technology
Antonio Abate: Laboratory of Photonics and Interfaces, Swiss Federal Institute of Technology
Satoshi Uchida: Komaba Organization for Educational Excellence (KOMEX), The University of Tokyo
Takaya Kubo: Research Center for Advanced Science and Technology (RCAST), The University of Tokyo
Sang Il Seok: Korea Research Institute of Chemical Technology
Mohammad Khaja Nazeeruddin: Laboratory of Photonics and Interfaces, Swiss Federal Institute of Technology
Anders Hagfeldt: Laboratory of Photomolecular Science, Swiss Federal Institute of Technology
Michael Grätzel: Laboratory of Photonics and Interfaces, Swiss Federal Institute of Technology
Hiroshi Segawa: Research Center for Advanced Science and Technology (RCAST), The University of Tokyo

Nature Communications, 2015, vol. 6, issue 1, 1-8

Abstract: Abstract The extension of the light absorption of photovoltaics into the near-infrared region is important to increase the energy conversion efficiency. Although the progress of the lead halide perovskite solar cells is remarkable, and high conversion efficiency of >20% has been reached, their absorption limit on the long-wavelength side is ∼800 nm. To further enhance the conversion efficiency of perovskite-based photovoltaics, a hybridized system with near-infrared photovoltaics is a useful approach. Here we report a panchromatic sensitizer, coded DX3, that exhibits a broad response into the near-infrared, up to ∼1100 nm, and a photocurrent density exceeding 30 mA cm−2 in simulated air mass 1.5 standard solar radiation. Using the DX3-based dye-sensitized solar cell in conjunction with a perovskite cell that harvests visible light, the hybridized mesoscopic photovoltaics achieved a conversion efficiency of 21.5% using a system of spectral splitting.

Date: 2015
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DOI: 10.1038/ncomms9834

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