Near-infrared selective dynamic windows controlled by charge transfer impedance at the counter electrode

作者：Pattathil Praveen; Scarfiello Riccardo; Giannuzzi Roberto; Veramonti Giulia; Sibillano Teresa; Qualtieri Antonio; Giannini Cinzia; Cozzoli P Davide; Manca Michele^*

来源：Nanoscale, 2016, 8(48): 20056-20065.

DOI：10.1039/c6nr07221f

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.

• 出版日期2016-12-28