Near-infrared selective dynamic windows controlled by charge transfer impedance at the counter electrode. Issue 48 (28th November 2016)

• Record Type: Journal Article
• Authors: Pattathil, Praveen; Scarfiello, Riccardo; Giannuzzi, Roberto; Veramonti, Giulia; Sibillano, Teresa; Qualtieri, Antonio; Giannini, Cinzia; Cozzoli, P. Davide; Manca, Michele
• Is Part Of: Nanoscale. Volume 8:Issue 48(2016)
• Page Start: 20056
• Page End: 20065
• Publication Date: 2016-11-28
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c6nr07221f
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : An electrochromic device employing an engineered nanotextured electrode – made of high aspect ratio tungsten oxide nanorods – is capable of selectively controlling the intensity of transmitted sunlight in the near-infrared region. 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.