title: Near-infrared selective dynamic windows controlled by charge transfer impedance at the counter electrode.
abstract: Recent developments in the exploitation of transparent conductive oxide nanocrystals paved the way to the realization of a new class of electrochemical systems capable of selectively shielding the infrared heat loads carried by sunlight and prospected the blooming of a key enabling technology to be implemented in the next generation of "zero-energy" building envelopes. Here we report the fabrication of a set of electrochromic devices embodying an engineered nanostructured electrode made by high aspect-ratio tungsten oxide nanorods, which allow for selectively and dynamically controlling sunlight transmission over the near-infrared to visible range. Varying the intensity of applied voltage makes the spectral response of the device change across three different optical regimes, namely fully transparent, near-infrared only blocking and both visible and near-infrared blocking. It is demonstrated that the degree of reversible modulation of the thermal radiation entering the glazing element can approach a remarkable 85%, accompanied by only a modest reduction in the luminous transmittance.
authors.affiliation: Center for Biomolecular Nanotechnologies (CBN) - Istituto Italiano di Tecnologia (IIT), Via Barsanti 14, 73010 Arnesano (Lecce), Italy. michele.manca@iit.it and Dipartimento di Matematica e Fisica "E. De Giorgi, Università del Salento, c/o Campus Ecotekne, via Arnesano, 73100 Lecce, Italy.
authors.forename: Praveen
authors.initials: P
authors.lastname: Pattathil
authors.affiliation: CNR-NANOTEC - Institute of Nanotechnology, sede di Lecce, c/o Campus Ecotekne, via Monteroni, 73100 Lecce, Italy and Dipartimento di Matematica e Fisica "E. De Giorgi, Università del Salento, c/o Campus Ecotekne, via Arnesano, 73100 Lecce, Italy.
authors.forename: Riccardo
authors.initials: R
authors.lastname: Scarfiello
authors.affiliation: Center for Biomolecular Nanotechnologies (CBN) - Istituto Italiano di Tecnologia (IIT), Via Barsanti 14, 73010 Arnesano (Lecce), Italy. michele.manca@iit.it.
authors.forename: Roberto
authors.initials: R
authors.lastname: Giannuzzi
authors.affiliation: Center for Biomolecular Nanotechnologies (CBN) - Istituto Italiano di Tecnologia (IIT), Via Barsanti 14, 73010 Arnesano (Lecce), Italy. michele.manca@iit.it.
authors.forename: Giulia
authors.initials: G
authors.lastname: Veramonti
authors.affiliation: CNR-IC - Institute of Crystallography, via Amendola 122/o, 70126 Bari, Italy.
authors.forename: Teresa
authors.initials: T
authors.lastname: Sibillano
authors.affiliation: Center for Biomolecular Nanotechnologies (CBN) - Istituto Italiano di Tecnologia (IIT), Via Barsanti 14, 73010 Arnesano (Lecce), Italy. michele.manca@iit.it.
authors.forename: Antonio
authors.initials: A
authors.lastname: Qualtieri
authors.affiliation: CNR-IC - Institute of Crystallography, via Amendola 122/o, 70126 Bari, Italy.
authors.forename: Cinzia
authors.initials: C
authors.lastname: Giannini
authors.affiliation: CNR-NANOTEC - Institute of Nanotechnology, sede di Lecce, c/o Campus Ecotekne, via Monteroni, 73100 Lecce, Italy and Dipartimento di Matematica e Fisica "E. De Giorgi, Università del Salento, c/o Campus Ecotekne, via Arnesano, 73100 Lecce, Italy.
authors.forename: P Davide
authors.identifier: http://orcid.org/0000-0001-8037-6937
authors.initials: PD
authors.lastname: Cozzoli
authors.affiliation: Center for Biomolecular Nanotechnologies (CBN) - Istituto Italiano di Tecnologia (IIT), Via Barsanti 14, 73010 Arnesano (Lecce), Italy. michele.manca@iit.it.
authors.forename: Michele
authors.identifier: http://orcid.org/0000-0002-6903-2954
authors.initials: M
authors.lastname: Manca