تقرير
Bond polarizability as a probe of local crystal fields in hybrid lead-halide perovskites
| العنوان: | Bond polarizability as a probe of local crystal fields in hybrid lead-halide perovskites |
|---|---|
| المؤلفون: | Wei, Yujing, Volosniev, Artem G., Lorenc, Dusan, Zhumekenov, Ayan A., Bakr, Osman M., Lemeshko, Mikhail, Alpichshev, Zhanybek |
| المصدر: | J. Phys. Chem. Lett. 14, 6309 (2023) |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science, Condensed Matter - Other Condensed Matter |
| الوصف: | A rotating organic cation and a dynamically disordered soft inorganic cage are the hallmark features of hybrid organic-inorganic lead-halide perovskites. Understanding the interplay between these two subsystems is a challenging problem but it is this coupling that is widely conjectured to be responsible for the unique behavior of photo-carriers in these materials. In this work, we use the fact that the polarizability of the organic cation strongly depends on the ambient electrostatic environment to put the molecule forward as a sensitive probe of local crystal fields inside the lattice cell. We measure the average polarizability of the C/N--H bond stretching mode by means of infrared spectroscopy, which allows us to deduce the character of the motion of the cation molecule, find the magnitude of the local crystal field and place an estimate on the strength of the hydrogen bond between the hydrogen and halide atoms. Our results pave the way for understanding electric fields in lead-halide perovskites using infrared bond spectroscopy. Comment: version accepted for publication in The Journal of Physical Chemistry Letters |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1021/acs.jpclett.3c01158 |
| URL الوصول: | http://arxiv.org/abs/2304.14198 |
| رقم الأكسشن: | edsarx.2304.14198 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1021/acs.jpclett.3c01158 |
|---|