Lithium-Ion Endohedral Fullerene (Li+@C60) Dopants in Stable Perovskite Solar Cells Induce Instant Doping and Anti-Oxidation

Il Jeon, Hiroshi Ueno, Seungju Seo, Kerttu Aitola, Ryosuke Nishikubo, Akinori Saeki, Hiroshi Okada, Gerrit Boschloo, Shigeo Maruyama, Yutaka Matsuo

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

Herein, we report use of [Li+@C60]TFSI as a dopant for spiro-MeOTAD in lead halide perovskite solar cells. This approach gave an air stability nearly 10-fold that of conventional devices using Li+TFSI. Such high stability is attributed to the hydrophobic nature of [Li+@C60]TFSI repelling moisture and absorbing intruding oxygen, thereby protecting the perovskite device from degradation. Furthermore, [Li+@C60]TFSI could oxidize spiro-MeOTAD without the need for oxygen. The encapsulated devices exhibited outstanding air stability for more than 1000 h while illuminated under ambient conditions.

Original languageEnglish
Pages (from-to)4607-4611
Number of pages5
JournalAngewandte Chemie - International Edition
Volume57
Issue number17
DOIs
Publication statusPublished - 2018 Apr 16

Keywords

  • air stability
  • doping
  • fullerenes
  • lithium
  • perovskite solar cells

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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