A generic route of hydrophobic doping in hole transporting material to increase longevity of perovskite solar cells
| Main Authors: | Caliò, Laura, Salado, Manuel, Kazim, Samrana, Ahmad, Shahzada |
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| Format: | Article |
| Bahasa: | eng |
| Terbitan: |
, 2020
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/4088821 |
Daftar Isi:
- The use of hydrophobic dopant is paramount for the success of organic semiconductors. Here we demonstrate, the use of N-heterocyclic hydrophobic ionic liquid, 1-butyl-3-methylpyridinium bis(trifluoromethylsulfonyl) imide (BMPyTFSI) to induce dual functionality; as p-type dopant as well as additive for state of the art Spiro-OMeTAD hole transporting material (HTM). This ionic liquid doped HTM was then implemented for perovskite solar cells fabrication and gave competitive results. The dopant has the ability to substitute state-of-the-art ultra-hygroscopic lithium salt (LiTFSI) and problematic 4-tert-butylpyridine (t-BP) additive. BMPyTFSI was found to increase the conductivity of Spiro-OMeTAD, and its usage as dopant in HTM reduces charge recombination, improves the film formation by reducing the pinholes on HTM surface, and allows to fabricate efficient devices. Competitive air stability of solar cells in comparison to their state-of-the-art dopant was found, and these findings open up to a broad range of organic semiconductors for hydrophobic ionic liquid-based doping.