Thermoelectric Performance of Lead-Free Two-Dimensional Halide Perovskites Featuring Conjugated Ligands

被引：41

作者：

Hsu, Sheng-Ning ^{[1
]}

Zhao, Wenchao ^{[1
]}

Gao, Yao ^{[1
]}

Akriti ^{[1
]}

Segovia, Mauricio ^{[2
,3
]}

Xu, Xianfan ^{[2
,3
]}

Boudouris, Bryan W. ^{[1
,4
]}

Dou, Letian ^{[1
,3
]}

机构：

[1] Purdue Univ, Charles D Davidson Sch Chem Engn, W Lafayette, IN 47907 USA

[2] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA

[3] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA

[4] Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA

来源：

NANO LETTERS | 2021年 / 21卷 / 18期

基金：

美国国家科学基金会;

关键词：

Thermoelectric; Perovskites; Layers; Thin Films; Superlattices; HEAT;

D O I：

10.1021/acs.nanolett.1c02890

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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) mu W m(-1) K-2 at 343 K with an electrical conductivity of 5.07 S cm(-1) and a Seebeck coefficient of 118.1 mu V 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.

引用

页码：7839 / 7844

页数：6

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