Resumo (PT):
Abstract (EN):
Solar energy harvesting and chromogenic technologies can be integrated together to give self-powered
and wireless photoelectrochromic devices (PECD). Due to the similarity in the architecture of both dyesensitized solar cells (DSC) and electrochromic devices (ECD), it is possible to merge these two devices
into one combined solar-powered electrochromic device known as DSC-EC. The present work describes
the preparation and characterization of electrochromic solar cells using PEDOT:PSS (poly(3,4-
ethylenedioxythiophene) polystyrene sulfonate) as electrochromic material in the counter-electrode.
Different configurations and liquid and polymer-based electrolytes are studied. The resulting
electrochromic solar cells were characterized focusing on the determination of solar to electricity
conversion efficiency and the color contrast was assessed using color coordinates under simulated solar
irradiation. The best DSC-EC configuration originates a color contrast of (DE = 30) at a potential difference
of 0.4 V and energy conversion efficiency of 4.9% at VOC of 0.66 V and JSC of 11 mAcm2
, when using the
liquid electrolyte. On the other hand, the best performing DSC-EC using the polymer-based electrolyte
showed a very good color contrast of (DE = 47) at short circuit and an energy conversion efficiency of 1% at
VOC of 0.63V and JSC of 4.5 mAcm-2.
Language:
English
Type (Professor's evaluation):
Scientific
Notes:
Journal Citation Reports
No. of pages:
8