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Barkat, L., Hssein, M., El Jouad, Z., Cattin, L., Louarn, G., Stephant, N., Khelil, A., Ghamnia, M., Addou, M., Morsli, M. & Bernede, J. C. (2017) Efficient hole-transporting layer MoO3:CuI deposited by co-evaporation in organic photovoltaic cells. Phys. Status Solidi A-Appl. Mat. 214 1600433.
Added by: Richard Baschera (2017-04-03 12:21:46) Last edited by: Richard Baschera (2017-04-03 12:28:36) |
| Type de référence: Article DOI: 10.1002/pssa.201600433 Numéro d'identification (ISBN etc.): 1862-6300 Clé BibTeX: Barkat2017 Voir tous les détails bibliographiques  |
Catégories: ID2M, INTERNATIONAL, MIOPS Mots-clés: buffer layer, buffer layers, CuI, Defects, deposition, gold, Interface, MoO3, optimization, organic solar cells, orientation, performance, polymer solar-cells, Stability Créateurs: Addou, Barkat, Bernede, Cattin, El Jouad, Ghamnia, Hssein, Khelil, Louarn, Morsli, Stephant Collection: Phys. Status Solidi A-Appl. Mat. |
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In order to improve hole collection at the interface anode/electron donor in organic photovoltaic cells, it is necessary to insert a hole-transporting layer. CuI was shown to be a very efficient hole-transporting layer. However, its tendency to be quite rough tends to induce leakage currents and it is necessary to use a very slow deposition rate for CuI to avoid such negative effect. Herein, we show that the co-deposition of MoO3 and CuI avoids this difficulty and allows deposition of a homogeneous efficient hole-collecting layer at an acceptable deposition rate. Via an XPS study, we show that blending MoO3:CuI improves the hole collection efficiency through an increase of the gap state density. This increase is due to the formation of Mo5+ following interaction between MoO3 and CuI. Not only does the co-evaporation process allow for decreasing significantly the deposition time of the hole-transporting layer, but also it increases the efficiency of the device based on the planar heterojunction, CuPc/C-60.
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