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Layered multi-oxide concept was applied for fabrication of photoanodes for dye-sensitized solar cells based on ZnO and SnO 2, capitalizing on the beneficial properties of each oxide. The effect of different combinations of ZnO@ SnO 2 layers was investigated, aimed at exploiting the high carrier mobility provided by the ZnO and the higher stability under UV irradiation pledged by SnO 2. Bi-oxide photoanodes performed much better in terms of photoconversion efficiency (PCE)(4.96%) compared to bare SnO 2 (1.20%) and ZnO (1.03%). Synergistic cooperation is effective for both open circuit voltage and photocurrent density: enhanced values were indeed recorded for the layered photoanode as compared with bare oxides (V oc enhanced from 0.39 V in case of bare SnO 2 to 0.60 V and J sc improved from 2.58 mA/cm 2 pertaining to single ZnO to 14.8 mA/cm 2). Improved functional performances of the layered …
Nature Publishing Group
Publication date: 
30 Sep 2015

Riccardo Milan, Gurpreet Singh Selopal, Mauro Epifani, Marta Maria Natile, G Sberveglieri, Alberto Vomiero, Isabella Concina

Biblio References: 
Volume: 5 Issue: 1 Pages: 1-12
Scientific reports