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Updated: Oct 21, 2025
Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation
Published on: October 1, 2019
Thermoelectric Performance of Lead-Free Two-Dimensional Halide Perovskites Featuring Conjugated Ligands
Sheng-Ning Hsu1, Wenchao Zhao1, Yao Gao1
1Charles D. Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States.
Abstract:
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.
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