Synergistic effect of additives on 2D perovskite film towards efficient and stable solar cell

Hualin Zheng, Detao Liu, Yafei Wang, Yingguo Yang, Hao Li, Ting Zhang, Hao Chen, Long Ji, Zhi Chen, Shibin Li

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

Recently, two-dimensional (2D) organic-inorganic hybrid perovskites have attracted tremendous attention due to their excellent environment stability. However, the inhibition of out-of-plane charge transport limits the performance of 2D based perovskite solar cells (PVSCs). To overcome this issue, we prepare the vertical-orientated 2D perovskite film via introducing dimethyl sulfoxide (DMSO) and thio-semicarbazide (TSC) as additives into the precursor solution. High-quality 2D (BA)2(MA)3Pb4I13 (BA = n-butylammonium, MA = methylammonium) films with uniform morphology, increased grain size, intensified crystallinity and vertical orientation are therefore fabricated by a synergistic effect of additives. As a result, the trap-state density in 2D (BA)2(MA)3Pb4I13 films is reduced and the charge transport is remarkably improved. The power conversion efficiency (PCE) of the PVSCs is boosted from the 1.05% to 14.15%. An unsealed device retains 90.3% of its initial PCE after 720 h storage in air atmosphere with relative humidity of 25 ± 5% at 25 °C. The results show the synergistic effect of TSC and DMSO on perovskite films is an effective approach toward efficient and stable 2D PVSC.

Original languageEnglish
Article number124266
JournalChemical Engineering Journal
Volume389
DOIs
StatePublished - Jun 1 2020

Bibliographical note

Publisher Copyright:
© 2020 Elsevier B.V.

Keywords

  • 2D perovskite
  • Charge transport
  • Crystallization process
  • Orientation
  • Stability
  • Synergistic effect

ASJC Scopus subject areas

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

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