Embedment of nano-sized Ag layer into Ag-doped In 2 O 3 films for use as highly transparent and conductive anode in organic solar cells

Da Young Cho, Seok In Na, Kwun Bum Chung, Han Ki Kim

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Abstract By inserting a nano-sized Ag layer between bottom Ag-doped In 2 O 3 (AIO) and a top AIO layer, we were able to control the sheet resistance and optical transmittance of AIO films for application in organic solar cells (OSCs) as a transparent electrode. To optimize the AIO/Ag/AIO multilayer, we investigated the electrical, optical, structural and morphological properties of the AIO/Ag/AIO multilayer as a function of Ag interlayer thickness with a constant bottom and top AIO thickness of 35 nm. The optimized AIO/Ag/AIO multilayer showed a much lower resistivity of 3.988 × 10 -5 Ω cm and a higher optical transmittance of 84.79% than the values (4.625 × 10 -4 Ω cm and 78.36%) of the single AIO film, due to the high conductivity of the metallic Ag layer and the antireflection effect of the symmetric AIO/Ag/AIO structure. In addition, we investigated the performances of OSCs with AIO/Ag/AIO electrodes as a function of Ag interlayer thickness to determine the optimal Ag thickness to produce a high power conversion efficiency (PCE) of the OSCs. Based on the PCE of the OSCs, we correlated the performance of the OSCs with the Ag interlayer thickness in the AIO/Ag/AIO multilayer and suggested a possible mechanism to explain the dependency of PCE on Ag thickness in AIO/Ag/AIO multilayer electrodes.

Original languageEnglish
Article number30148
Pages (from-to)88-95
Number of pages8
JournalApplied Surface Science
Volume347
DOIs
StatePublished - 2015

Keywords

  • Ag-doped In O
  • AIO/Ag/AIO multilayer
  • Nano-sized Ag layer
  • Organic solar cells
  • Power conversion efficiency
  • Transparent electrode

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