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 language | English |
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Pages (from-to) | 4607-4611 |
Number of pages | 5 |
Journal | Angewandte Chemie - International Edition |
Volume | 57 |
Issue number | 17 |
DOIs | |
Publication status | Published - 2018 Apr 16 |
Keywords
- air stability
- doping
- fullerenes
- lithium
- perovskite solar cells
ASJC Scopus subject areas
- Catalysis
- Chemistry(all)