Substituents role in piperidinyl-perylenediimide used as Dopant-Free Hole-Selective Layer for Perovskite Solar Cells Fabrication
| Main Authors: | Payno, David, Salado, Manuel, Andresini, Michael, Gutiérrez-Moreno, David, Huang, Peng, Ciriaco, Fulvio, Kazim, Samrana, Sastre-Santos, Angela, Fernández-Lázaro, Fernando, Ahmad, Shahzada |
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| Format: | Article |
| Bahasa: | eng |
| Terbitan: |
, 2020
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/4153194 |
Daftar Isi:
- The charge selective layer is of significance for the fabrication of emerging photovoltaics, including perovskite based solar cells. Molecular hole-transport materials (HTMs) are being employed as charge transporters, owing to their synthetic molecular flexibility that allows the fine-tuning of their electro-optical properties. Doping of HTMs is required in most of the cases, but it is a trade-off between long-term durability and device performance. We have tuned the energetic level of perylenediimides (PDIs) to find its application as hole-selective layers for perovskite solar cells fabrication. The substituents position influences the geometry of the PDI core, which can lose planarity, thus presenting a core twist angle between the two naphthalene subunits. We have realized that undoped PDI performed better than undoped Spiro-OMeTAD. Thus, the future design of PDIs with more aligned energetic levels will minimize recombination losses in solar cells, favouring a performance enhancement.