Organic spacer engineering of Ruddlesden-Popper perovskite materials toward efficient and stable solar cells

Jiamin Xu, Jiabang Chen, Shi Chen*, Han Gao, Yaru Li, Zhengyan Jiang, Yong Zhang, Xingzhu Wang*, Xunjin Zhu*, Baomin Xu*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

7 Citations (Scopus)

Abstract

Organic spacers in the Ruddlesden-Popper perovskite (RPP) materials significantly enhance the operating stability of the corresponding solar cells, but limit their devices performance owing to inefficient charge transport. Inspired by 3D perovskites, binary spacer-based RPP devices show great potential in outperforming their unary spacer counterparts, yet it still lacks the rational design of RPP materials based on binary spacer from a molecular level to tune optoelectronic properties and device performance. Therefore, several novel binary spacer RPP films (F-PEA1-xGAx)2MA3Pb4I13 (x ≤ 0.3, F-PEA = 4-fluorophenethylammonium, GA = guanidinium, MA = methylammonium) are prepared to investigate the impact of binary spacer on film properties and device performance. By incorporating 20 % GA into F-PEA2MA3Pb4I13, the as-prepared film becomes smoother with superior vertical alignment and larger-sized crystal grains, yielding an obvious reduction of trap density and better hole mobility, which more effectively inhibits the nonradiative recombination and accelerates the hole extraction. Consequently, an optimal efficiency of 17.50 % is achieved for the (F-PEA0.8GA0.2)2MA3Pb4I13 based device, among the highest values for binary spacer RPP (n ≤ 5) solar cells reported to date. Additionally, this device maintains 87 % and 90 % of its starting efficiency after 500 aging hours in ambient air and 1000 h tracking at the maximum power point under illumination, respectively.

Original languageEnglish
Article number139790
JournalChemical Engineering Journal
Volume453, Part 1
Early online date14 Oct 2022
DOIs
Publication statusPublished - Feb 2023

Scopus Subject Areas

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

User-Defined Keywords

  • Hydrophobicity
  • Organic spacer
  • Two-dimensional perovskite

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