Improvement in stability of bilayer organic solar cells using an ultra-thin Au layer

Saeed Saleh Ardestani*, Rasul Ajeian, Moosa Nakhaee Badrabadi, Mohammad Tavakkoli

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)

Abstract

In order to improve the stability of organic solar cells based on CuPc/C60 planar heterojunction, an ultra-thin layer of Au (∼2 nm) is inserted between CuPc and PEDOT:PSS. Although, short circuit current density (Jsc) and open circuit voltage (Voc) of the device containing Au layer are less than those of the Au-free one, it has comparable power conversion efficiency (ηp) owing to its higher fill factor (FF). In addition, this ultra-thin Au layer enhances the stability of the device significantly. After a month under ambient condition, the device with indium thin oxide (ITO)/PEDOT:PSS/Au anode reaches 67% of its initial ηp value, while the ηp of the cell with ITO/PEDOT:PSS anode drops to less than half of its initial value. The improvement in stability is ascribed to the more durable Au/CuPc interface in contrast to the PEDOT:PSS/CuPc interface.

Original languageEnglish
Pages (from-to)107-111
Number of pages5
JournalSolar Energy Materials and Solar Cells
Volume111
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

Keywords

  • Au layer
  • Organic solar cells
  • PEDOT:PSS
  • Stability

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