Plasmonic Effect of Gold Nanostars in Highly Efficient Organic and Perovskite Solar Cells

Riski Titian Ginting, Sandeep Kaur, Dong-Kwon Lim, Jung Mu Kim, Joong Hee Lee, Seung Hee Lee, Jae Wook Kang

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Herein, a novel strategy is presented for enhancing light absorption by incorporating gold nanostars (Au NSs) into both the active layer of organic solar cells (OSCs) and the rear-contact hole transport layer of perovskite solar cells (PSCs). We demonstrate that the power conversion efficiencies of OSCs and PSCs with embedded Au NSs are improved by 6 and 14%, respectively. We find that pegylated Au NSs are greatly dispersable in a chlorobenzene solvent, which enabled complete blending of Au NSs with the active layer. The plasmonic contributions and accelerated charge transfer are believed to improve the short-circuit current density and the fill factor. This study demonstrates the roles of plasmonic nanoparticles in the improved optical absorption, where the improvement in OSCs was attributed to surface plasmon resonance (SPR) and in PSCs was attributed to both SPR and the backscattering effect. Additionally, devices including Au NSs exhibited a better charge separation/transfer, reduced charge recombination rate, and efficient charge transport. This work provides a comprehensive understanding of the roles of plasmonic Au NS particles in OSCs and PSCs, including an insightful approach for the further development of high-performance optoelectronic devices.

Original languageEnglish
Pages (from-to)36111-36118
Number of pages8
JournalACS Applied Materials and Interfaces
Volume9
Issue number41
DOIs
Publication statusPublished - 2017 Oct 18

Keywords

  • backscattering
  • gold nanostar
  • impedance
  • near-field enhancement
  • organic solar cells
  • perovskite solar cells
  • plasmonic

ASJC Scopus subject areas

  • Materials Science(all)

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