Highly efficient CH3NH3PbI3 perovskite solar cells prepared by AuCl3-doped graphene transparent conducting electrodes

Jin Hyuck Heo, Dong Hee Shin, Sung Kim, Min Hyeok Jang, Min Ho Lee, Sang Woo Seo, Suk Ho Choi, Sang Hyuk Im

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

We employed AuCl3-doped graphene as a p-type transparent conducting electrode (TCE) in an p-i-n type CH3NH3PbI3 perovskite solar cell using poly (3,4-ethylenedioxythiophene):poly(styrene sulfonate) and phenyl-C61-butyric acid methyl ester as the hole and electron transporting layers, respectively, and obtained 17.4–17.9% power conversion efficiency at 1 Sun condition. The work function of the AuCl3-doped graphene TCE was controllable from ∼4.52 to ∼4.86 eV. Due to the p-type doping by the AuCl3 treatment, the graphene TCE shows good hole mobility and greatly-improved sheet resistance (∼70 ohm/cm2) compared to the pristine graphene TCE (∼890 ohm/cm2) but its transmittance was gradually decreased with the doping concentration (nD). Owing to the trade-off correlation between the sheet resistance and the transmittance of the AuCl3-doped graphene TCE, the ratio of DC conductivity and optical conductivity was the highest at nD = 7.5 mM. Therefore, the highest performance was achievable by using 7.5 mM AuCl3-doped graphene TCE.

Original languageEnglish
Pages (from-to)153-159
Number of pages7
JournalChemical Engineering Journal
Volume323
DOIs
Publication statusPublished - 2017

Keywords

  • AuCl
  • Graphene
  • Perovskite solar cells
  • Transparent conducting electrode
  • p-Type doping

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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