Defect Healing in FAPb(I1-xBrx)3 Perovskites: Multifunctional Fluorinated Sulfonate Surfactant Anchoring Enables >21% Modules with Improved Operation Stability

Jun Zhu, Yongteng Qian, Zijia Li, Oh Yeong Gong, Zongfu An, Qing Liu, Jin Hyuk Choi, He Guo, Pil Jin Yoo, Dong Hoe Kim, Tae Kyu Ahn, Gill Sang Han, Hyun Suk Jung

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Formamidinium lead triiodide-based perovskite solar cells have emerged as one of the most promising candidates that can be potentially used to develop photovoltaic technologies in the future. The commercial use of perovskite solar cell modules (PSCMs) is limited as it is challenging to fabricate high-quality, efficient, and stable large-area perovskite light-absorbing films. Heptadecafluorooctanesulfonic acid tetraethylammonium salt (HFSTT), containing fluorinated long alkyl chains as hydrophobic tails and sulfonic acid groups (SO3) as hydrophilic heads, which exhibit a great synergistic potential in large-area film uniform fabrication, crystallization orientation modulation, defect passivation, and device operation stability enhancement, are introduced. The HFSTT-modified films exhibit a prominent (100) orientation and lower trap-state density as well as enhanced carrier mobilities and diffusion lengths, facilitating a champion unit device with an impressive power conversion efficiency (PCE) of 23.88% (0.14 cm2) and 22.52% (1 cm2) with a low voltage deficit around 0.341 V. The unencapsulated device retains ≈70% of its initial efficiency after 1000 h under heat damping test (60 °C and ≈60% RH). Moreover, the PSCMs exhibiting PCEs of 21.05% (with notable fill factor 0.79) and 18.27% are characterized by the active areas of 25.98 and 60.68 cm2, respectively.

Original languageEnglish
Article number2200632
JournalAdvanced Energy Materials
Volume12
Issue number20
DOIs
Publication statusPublished - 2022 May 26

Keywords

  • crystallization orientation modulation
  • defect passivation
  • fluorinated sulfonate surfactants
  • long-term stability
  • perovskite solar cells

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Fingerprint

Dive into the research topics of 'Defect Healing in FAPb(I1-xBrx)3 Perovskites: Multifunctional Fluorinated Sulfonate Surfactant Anchoring Enables >21% Modules with Improved Operation Stability'. Together they form a unique fingerprint.

Cite this