Efficiency Improvement of Organic Photovoltaics Adopting Li- and Cd-Doped ZnO Electron Extraction Layers

Jun Young Kim, Jaehoon Kim, Jeongkyun Roh, Hyeok Kim, Changhee Lee

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

High-efficiency organic photovoltaics (OPV) with a PTB7: PC70BM photoabsorption layer were fabricated by adopting Li- and Cd-doped ZnO electron extraction layers. For devices with both Li- and Cd-doped ZnO, the performances were significantly improved, including the short-circuit current, open-circuit voltage, fill factor (FF), and power conversion efficiency. Furthermore, film characterization with techniques including X-ray diffraction, high-resolution transmission electron microscopy, and resistivity analysis was performed. The results suggest that the improved electrical properties of Li- and Cd-doped ZnO electron extraction layers with a doping ratio of approximately 6 at% are highly effective in achieving a power conversion efficiency of up to 8%.

Original languageEnglish
Article number7466779
Pages (from-to)930-933
Number of pages4
JournalIEEE Journal of Photovoltaics
Volume6
Issue number4
DOIs
StatePublished - Jul 2016

Keywords

  • Doping
  • ZnO
  • electron extraction layer
  • inverted structure
  • organic photovoltaics (OPVs)

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