TY - JOUR
T1 - High thermoelectric efficiency realized in SnSe crystals via structural modulation
AU - Qin, Bingchao
AU - Wang, Dongyang
AU - Hong, Tao
AU - Wang, Yuping
AU - Liu, Dongrui
AU - Wang, Ziyuan
AU - Gao, Xiang
AU - Ge, Zhen Hua
AU - Zhao, Li Dong
N1 - Publisher Copyright:
© 2023, The Author(s).
PY - 2023/12
Y1 - 2023/12
N2 - Crystalline thermoelectrics have been developed to be potential candidates for power generation and electronic cooling, among which SnSe crystals are becoming the most representative. Herein, we realize high-performance SnSe crystals with promising efficiency through a structural modulation strategy. By alloying strontium at Sn sites, we modify the crystal structure and facilitate the multiband synglisis in p-type SnSe, favoring the optimization of interactive parameters μ and m*. Resultantly, we obtain a significantly enhanced PF ~85 μW cm−1 K−2, with an ultrahigh ZT ~1.4 at 300 K and ZTave ~2.0 among 300–673 K. Moreover, the excellent properties lead to single-leg device efficiency of ~8.9% under a temperature difference ΔT ~300 K, showing superiority among the current low- to mid-temperature thermoelectrics, with an enhanced cooling ΔTmax of ~50.4 K in the 7-pair thermoelectric device. Our study further advances p-type SnSe crystals for practical waste heat recovery and electronic cooling.
AB - Crystalline thermoelectrics have been developed to be potential candidates for power generation and electronic cooling, among which SnSe crystals are becoming the most representative. Herein, we realize high-performance SnSe crystals with promising efficiency through a structural modulation strategy. By alloying strontium at Sn sites, we modify the crystal structure and facilitate the multiband synglisis in p-type SnSe, favoring the optimization of interactive parameters μ and m*. Resultantly, we obtain a significantly enhanced PF ~85 μW cm−1 K−2, with an ultrahigh ZT ~1.4 at 300 K and ZTave ~2.0 among 300–673 K. Moreover, the excellent properties lead to single-leg device efficiency of ~8.9% under a temperature difference ΔT ~300 K, showing superiority among the current low- to mid-temperature thermoelectrics, with an enhanced cooling ΔTmax of ~50.4 K in the 7-pair thermoelectric device. Our study further advances p-type SnSe crystals for practical waste heat recovery and electronic cooling.
UR - https://www.scopus.com/pages/publications/85150140570
U2 - 10.1038/s41467-023-37114-7
DO - 10.1038/s41467-023-37114-7
M3 - 文章
C2 - 36914654
AN - SCOPUS:85150140570
SN - 2041-1723
VL - 14
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 1366
ER -