Thermoelectric Performance of Lead-Free Two-Dimensional Halide Perovskites Featuring Conjugated Ligands
| Autor: | Wenchao Zhao, Yao Gao, Akriti, Letian Dou, Bryan W. Boudouris, Xianfan Xu, Mauricio Segovia, Sheng-Ning Hsu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.industry Mechanical Engineering Superlattice Halide Bioengineering General Chemistry Condensed Matter Physics Thermal conductivity Electrical resistivity and conductivity Seebeck coefficient Thermoelectric effect Optoelectronics General Materials Science Thin film business Perovskite (structure) |
| Zdroj: | Nano Letters. 21:7839-7844 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/acs.nanolett.1c02890 |
| Popis: | Sn-based halide perovskites are promising for thermoelectric (TE) device applications because of their high electrical conductivity as well as the low thermal conductivity associated with their soft lattices. However, conventional three-dimensional Sn-based perovskites are not stable under typical TE device operating conditions. Here, we report a stable two-dimensional Sn-based perovskite for thermoelectric energy conversion by incorporating bulky conjugated ligands. We demonstrate a thin film with a large power factor of 5.42 ± 3.07 (average) and 7.07 (champion) μW m-1 K-2 at 343 K with an electrical conductivity of 5.07 S cm-1 and a Seebeck coefficient of 118.1 μV K-1. Importantly, these thin films show excellent operational stability (i.e., for over 100 h) at 313 K. This work suggests that the novel hybrid two-dimensional perovskites are a promising platform for thermoelectric energy conversion applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|