Piperazine Suppresses Self-Doping in CsSnI 3 Perovskite Solar Cells

Tze Bin Song, Takamichi Yokoyama, Jenna Logsdon, Michael R Wasielewski, Shinji Aramaki, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Tin-based halide perovskite materials are promising candidates for lead-free halide perovskite solar cells. However, they suffer from poor device reproducibility and limited overall power conversion efficiencies due to their tendency to become semimetallic from p-type defect states. Herein, we demonstrate an effective approach to address this issue via the addition of piperazine to the precursor solution of tin-based halide perovskite films, to suppress the undesirable p-doping of CsSnI 3 films. Piperazine is found to significantly reduce the conductivity of CsSnI 3 films, improve the film coverage, and at the same time suppress the crystallization of excess SnI 2 . Consequently, short-circuit behaviors are eliminated, with significantly improved CsSnI 3 solar-cell performance. Moreover, the effects of incorporating SnCl 2 and SnF 2 into the CsSnI 3 devices were investigated in conjunction with addition of piperazine to achieve CsSnI 3 devices with a maximum power conversion efficiency of 3.83%.

Original languageEnglish
Pages (from-to)4221-4226
Number of pages6
JournalACS Applied Energy Materials
Volume1
Issue number8
DOIs
Publication statusPublished - Aug 27 2018

Fingerprint

Doping (additives)
Tin
Perovskite
Conversion efficiency
Crystallization
Short circuit currents
Solar cells
Lead
Defects
Perovskite solar cells
piperazine
perovskite

Keywords

  • diamine
  • lead-free
  • perovskite
  • piperazine
  • solar cells

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Chemical Engineering (miscellaneous)
  • Electrochemistry
  • Materials Chemistry
  • Electrical and Electronic Engineering

Cite this

Piperazine Suppresses Self-Doping in CsSnI 3 Perovskite Solar Cells . / Song, Tze Bin; Yokoyama, Takamichi; Logsdon, Jenna; Wasielewski, Michael R; Aramaki, Shinji; Kanatzidis, Mercouri G.

In: ACS Applied Energy Materials, Vol. 1, No. 8, 27.08.2018, p. 4221-4226.

Research output: Contribution to journalArticle

Song, Tze Bin ; Yokoyama, Takamichi ; Logsdon, Jenna ; Wasielewski, Michael R ; Aramaki, Shinji ; Kanatzidis, Mercouri G. / Piperazine Suppresses Self-Doping in CsSnI 3 Perovskite Solar Cells In: ACS Applied Energy Materials. 2018 ; Vol. 1, No. 8. pp. 4221-4226.
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AU - Aramaki, Shinji

AU - Kanatzidis, Mercouri G

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