In:
Applied Physics Letters, AIP Publishing, Vol. 94, No. 17 ( 2009-04-27)
Abstract:
Dye solar cells with Co(III)/Co(II) redox mediators have been prepared. To obtain higher conversion efficiencies, the recombination between photoinjected electrons and Co(III) species was minimized by deposition of a thin Al2O3 blocking layer over the mesoporous TiO2 surface. Measurements of current-voltage characteristic curves, both under illumination and in dark conditions, together with electrochemical impedance spectroscopy demonstrate the great effectiveness of the addition of a blocking layer in cells containing cobalt based electrolyte, by substantially reducing the recombination current. The consequent power conversion efficiency increase is more than double, passing from 0.94% to 2.48% under 300 W m−2 AM 1.5 illumination.
Type of Medium:
Online Resource
ISSN:
0003-6951
,
1077-3118
Language:
English
Publisher:
AIP Publishing
Publication Date:
2009
detail.hit.zdb_id:
211245-0
detail.hit.zdb_id:
1469436-0
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