Tailoring dispersion and aggregation of Au nanoparticles in the BHJ layer of polymer solar cells: Plasmon effects versus electrical effects

Wanjung Kim, Bong Geun Cha, Jung Kyu Kim, Woonggi Kang, Eunchul Kim, Tae Kyu Ahn, Dong Hwan Wang, Qing Guo Du, Jeong Ho Cho, Jaeyun Kim, Jong Hyeok Park

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Plasmonic effects that arise from embedding metallic nanoparticles (NPs) in polymer solar cells (PSCs) have been extensively studied. Many researchers have utilized metallic NPs in PSCs by either incorporating them into the PSC interlayers (e.g., the hole extraction and electron extraction layers) or blending them into the bulk heterojunction (BHJ) active layer. In such studies, the dispersity of the metallic NPs in each layer may vary due to both the different nature of the ligands and the amount of ligands on the metallic NPs. This in turn can produce different PSC performance parameters. Here, we systematically control the amount of attached organic ligands on Au NPs to control their dispersion behavior in the BHJ active layer of PSCs. By controlling the number of capping organic ligands on the Au NPs, the dispersity of the NPs in the BHJ layer is also controlled and the positive effects (particularly the plasmonic and electrical effects) of the Au NPs in the PSCs are investigated. From the obtained results, we find that the electrical contribution of the Au NPs is a more dominant factor for enhancing cell efficiency when compared to the plasmonic effect.

Original languageEnglish
Pages (from-to)3452-3458
Number of pages7
JournalChemSusChem
Volume7
Issue number12
DOIs
Publication statusPublished - 2014 Dec

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Chemical Engineering(all)
  • Materials Science(all)
  • Energy(all)

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