Progress in stability of organic solar cells exposed to air

Mohammad Tavakkoli, Rasul Ajeian*, Moosa Nakhaee Badrabadi, Saeed Saleh Ardestani, Sayid Mohammad Hasan Feiz, Komeil Elahi Nasab

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

23 Citations (Scopus)


In this paper, the stability of small-molecule organic solar cells based on copper phthalocyanine (CuPc) and fullerene (C60) is investigated. The use of silver instead of aluminum as the metal electrode in these solar cells, with smaller grain size and grain boundaries as well as with more uniform grain size distribution in the film, results in significant improvement in the lifetime of the devices. The substantial role of silver in the protection of the cells against permeation of oxygen and/or water molecules into the organic thin films is confirmed. Substitution of a thin buffer layer (70 Å) of bathophenanthroline (Bphen) for bathocuproine (BCP), sandwiched between C 60 and the cathode, makes considerable progress in the lifetime of the device.
Original languageEnglish
Pages (from-to)1964-1969
Number of pages6
JournalSolar Energy Materials and Solar Cells
Issue number7
Publication statusPublished - Jul 2011
MoE publication typeA1 Journal article-refereed


  • BCP
  • Bphen
  • Organic solar cells
  • Stability

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