Role of transition metal oxides in the charge recombination layer used in tandem organic photovoltaic cells

Publisher:
Royal Society of Chemistry
Publication Type:
Journal Article
Citation:
Journal of Materials Chemistry, 2012, 22 pp. 6285 - 6290
Issue Date:
2012
Full metadata record
Files in This Item:
Filename Description Size
c2jm30272a.pdfPublished Version1.33 MB
Adobe PDF
The mechanism of charge recombination in transition metal oxide-based interconnectors for tandem organic photovoltaic cells is investigated, where the interconnector is composed of an abrupt heterointerface between a Mg-doped 4,7-diphenyl-1,10-phenanthroline (Mg:BPhen) layer and a MoO3 film. Based on the results of the interface energetics determined by ultraviolet photoelectron spectroscopy, as well as the corresponding device characteristics, it is revealed that the MoO3 layer pronouncedly modifies the energy level alignment of the interconnector, which is beneficial for the charge recombination process at the interface between MoO3 and the adjacent donor material for electrons and holes injected from stacked subcells. The incorporation of Mg:BPhen is essential for the conduction of the generated electrons from the bottom subcell into the conduction band of MoO3.
Please use this identifier to cite or link to this item: