| Autor: |
N.J. Pérez-Viramontes, Selene Sepúlveda, C.M. Díaz-Acosta, Erika Bustos, A. Rodríguez, Luis A. Godínez, Perla F. Mendez, Francisco Javier Yate Rodríguez, S. Murcio-Hernández, Juan Manríquez |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
Electrochimica Acta. 143:247-256 |
| ISSN: |
0013-4686 |
| Popis: |
Ruthenium (II) complex-sensitized TiO 2 electrodes were chemically coated with NH 2 -terminated poly(amidoamide) dendrimers generation 4.0 in order to improve the performance of dye-sensitized solar cells using these photoanodes. The presence of dendrimers in these photodevices produced a global photovoltaic conversion efficiency of 6.78%, which was higher than that obtained for photocells without them (5.43%). The experimental results indicated that this treatment of the dye-sensitized TiO 2 electrodes allowed for controlling the concentrations of I 3 − anions and Li + cations into the dendrimers-modified dyed-TiO 2 pores during operation of the photocells. Consequently, the charge interception reaction and the charge accumulation process at the conduction band of the TiO 2 electrodes were simultaneously balanced by the establishment of I 2 ···NH 2 , NH···I − and C = O···Li + bonds at the branches of the confined dendrimers for increasing their global conversion efficiency. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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