Leverage of Pyridine Isomer on Phenothiazine Core: Organic Semiconductors as Selective layer in Perovskite Solar Cells
| Main Authors: | Huang, Peng, Manju, Kazim, Samrana, Lezama, Luis, Misra, Rajneesh, Ahmad, Shahzada |
|---|---|
| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 2022
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/5820660 |
Daftar Isi:
- To drive the development of perovskite solar cells (PSCs), hole transporting materials are imperative. In this context pyridine derivatives are being probed as small molecules based hole-transporting materials due to their Lewis base and electron-deficient unit. Herein, we focused our investigation on pyridine isomer molecules: 4,4'-(10-(pyridin-x-yl)-10H-phenothiazine-3,7-diyl)bis(N,N-bis(4-methoxyphenyl)aniline) (x = 2, 3, or 4), in which the pyridine nitrogen heteroatom is located at the 2, 3, and 4 positions, named as 2PyPTPDAn, 3PyPTPDAn, and 4PyPTPDAn, respectively. We decipher the structure–properties–device performance relationship impacted by different N-atom positions in pyridine. In the case of 3PyPTPDAn, the partial orbital overlap between HOMO and LUMO favors the generation of neutral excitons and hole transport, as well as the improve form-formation ability and this induces efficient hole extraction as compared to their 2,4 analogs. The fabricated solar cells with 3PyPTPDAn gave on par photovoltaic performance as of typical Spiro-OMeTAD, and higher than that of 2PyPTPDAn, and 4PyPTPDAn. The hydrophobicity and homogenous film properties of 3PyPTPDAn add merits to the stability. This work emphasizes the guidelines to develop small molecules for organic solar cells, organic light-emitting diode, and thermally activated delayed fluorescence.