Homo-composition and hetero-structure nanocomposite Pnma Bi2SeS2 - Pnnm Bi2SeS2 with high thermoelectric performance

Jabar, Bushra1; Li, Fu1; Zheng, Zhuanghao1; Mansoor, Adil2; Zhu, Yongbin3; Liang, Chongbin1; Ao, Dongwei1; Chen, Yuexing1; Liang, Guangxing1; Fan, Ping1; Liu, Weishu3,4

2021-12-10

10.1038/s41467-021-27564-2

NATURE COMMUNICATIONS   影响因子和分区

2041-1723

Nanocomposite engineering decouples the transport of phonons and electrons. This usually involves the in-situ formation or ex-situ addition of nanoparticles to a material matrix with hetero-composition and hetero-structure (heC-heS) interfaces or hetero-composition and homo-structure (heC-hoS) interfaces. Herein, a quasi homo-composition and hetero-structure (hoC-heS) nanocomposite consisting of Pnma Bi2SeS2 - Pnnm Bi2SeS2 is obtained through a Br dopant-induced phase transition, providing a coherent interface between the Pnma matrix and Pnnm second phase due to the slight structural difference between the two phases. This hoC-heS nanocomposite demonstrates a significant reduction in lattice thermal conductivity (similar to 0.40 W m(-1) K-1) and an enhanced power factor (7.39 mu W cm(-1) K-2). Consequently, a record high figure-of-merit ZT(max) =1.12 (at 773 K) and a high average figure-of-merit ZT(ave) = 0.72 (in the range of 323-773 K) are achieved. This work provides a general strategy for synergistically tuning electrical and thermal transport properties by designing hoC-heS nanocomposites through a dopant-induced phase transition.

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通讯

National Natural Science Foundation of China[52072248] ; National Key Research and Development Program of China[2018YFB0703600] ; Natural Science Foundation of Guangdong Province of China["2021A1515012128","2018A030313574"] ; Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06G587] ; Natural Science Foundation of SZU[827-000357] ; Shenzhen Key Projects of Long-Term Academic Support Plan[20200925164021002] ; Guangdong Provincial Key Laboratory Program of the Department of Science and Technology of Guangdong Province, China[2021B1212040001]

Science & Technology - Other Topics

Multidisciplinary Sciences

WOS:000729179400030

NATURE PORTFOLIO

Web of Science

1.Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen Key Lab Adv Thin Films & Applicat, Shenzhen 518060, Peoples R China
2.Beijing Univ Technol, Fac Mat & Mfg, 100 Peenle Yuan, Beijing 100124, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Guangdong Prov Key Lab Funct Oxide Mat & Devices, Shenzhen 518055, Peoples R China

Jabar, Bushra,Li, Fu,Zheng, Zhuanghao,et al. Homo-composition and hetero-structure nanocomposite Pnma Bi2SeS2 - Pnnm Bi2SeS2 with high thermoelectric performance[J]. NATURE COMMUNICATIONS,2021,12(1).

Jabar, Bushra.,Li, Fu.,Zheng, Zhuanghao.,Mansoor, Adil.,Zhu, Yongbin.,...&Liu, Weishu.(2021).Homo-composition and hetero-structure nanocomposite Pnma Bi2SeS2 - Pnnm Bi2SeS2 with high thermoelectric performance.NATURE COMMUNICATIONS,12(1).

Jabar, Bushra,et al."Homo-composition and hetero-structure nanocomposite Pnma Bi2SeS2 - Pnnm Bi2SeS2 with high thermoelectric performance".NATURE COMMUNICATIONS 12.1(2021).