Abstract

The engineering of electrochemically active films based on structurally and geometrically controlled transitionmetaloxide nanocrystals holds promise for the development of a new generation of energy-efficient dynamicwindows that may enable a spectrally selective control of sunlight transmission over the near-infrared regime.Herein, the different spectro-electrochemical signatures of two sets of engineered nanotextured electrodes madeof distinct anisotropic-shaped tungsten oxide building blocks are comparatively investigated. The electrodeswere fabricated starting from corresponding one-dimensional colloidal nanocrystals, namely solid and longitudinallycarved nanorods, respectively, which featured identical crystal phase and lattice orientation, butexposed two distinct space-filled volume structures with subtly different lattice parameters and nonequivalenttypes of accessible surfaces. The shape of nanocrystalline building blocks greatly impacted on the fundamentalelectrochemical charge-storage mechanisms and, hence on the electrochromic response of these electrodes, dueto concomitant bulk and surface-structure effects that could not be entirely traced to mere differences in surfaceto-volume ratio. Electrodes made of carved nanorods accommodated more than 80% of the total charge throughsurface-capacitance mechanisms. This unique prerogative was ultimately demonstrated to enable an outstandingspectral selectivity as well as an extremely efficient dynamic modulation of the optical transmittance at nearinfraredfrequencies (~ 80% in the range 700-1600 nm).

Autore Pugliese

• Giannini Cinzia , Sibillano Teresa

Tutti gli autori

• R. Giannuzzi; R. Scarfiello; T. Sibillano; C. Nobile; V. Grillo; C. Giannini; P. D. Cozzoli ; M. Manca

Titolo volume/Rivista

Nano Energy

Anno di pubblicazione

2017

ISSN

2211-2855

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

Non Disponibile

Ultimo Aggiornamento Citazioni

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Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile