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- Title
Improved electron collection in fullerene via caesium iodide or carbonate by means of annealing in inverted organic solar cells.
- Authors
Jouad, Zouhair El; Louarn, Guy; Praveen, Thappily; Predeep, Padmanabhan; Cattin, Linda; Bernède, Jean-Christian; Addou, Mohammed; Morsli, Mustapha
- Abstract
Inverted organic photovoltaic cells (IOPVCs), based on the planar heterojunction C60/CuPc, were grown using MoO3 as anode buffer layer and CsI or Cs2CO3 as cathode buffer layer (CBL), the cathode being an ITO coated glass. Work functions, Φf , of treated cathode were estimated using the cyclic voltammetry method. It is shown that Φf of ITO covered with a Cs compounds is decreased. This decrease is amplified by the annealing. It is shown that the thermal deposition under vacuum of the CBL induces a partial decomposition of the caesium compounds. In parallel, the formation of a compound with the In of ITO is put in evidence. This reaction is amplified by annealing, which allows obtaining IOPVCs with improved efficiency. The optimum annealing conditions is 150 °C for 5 min.
- Subjects
PHOTOVOLTAIC cells; CATHODES; CYCLIC voltammetry; ELECTRON donors; METALS
- Publication
EPJ Photovoltaics, 2014, Vol 5, p50401-p1
- ISSN
2105-0716
- Publication type
Article
- DOI
10.1051/epjpv/2014003