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Carrier-phonon decoupling in perovskite thermoelectrics via entropy engineering

文献类型：期刊论文

作者Zheng, Yunpeng1,2; Zhang, Qinghua3; Shi, Caijuan4; Zhou, Zhifang1; Lu, Yang5; Han, Jian1; Chen, Hetian1; Ma, Yunpeng1; Zhang, Yujun4; Lin, Changpeng6
刊名NATURE COMMUNICATIONS
出版日期2024-09-03
卷号15
DOI10.1038/s41467-024-52063-5
通讯作者Lin, Yuan-Hua(linyh@tsinghua.edu.cn)
英文摘要Thermoelectrics converting heat and electricity directly attract broad attentions. To enhance the thermoelectric figure of merit, zT, one of the key points is to decouple the carrier-phonon transport. Here, we propose an entropy engineering strategy to realize the carrier-phonon decoupling in the typical SrTiO3-based perovskite thermoelectrics. By high-entropy design, the lattice thermal conductivity could be reduced nearly to the amorphous limit, 1.25 W m(-1) K-1. Simultaneously, entropy engineering can tune the Ti displacement, improving the weighted mobility to 65 cm(2) V-1 s(-1). Such carrier-phonon decoupling behaviors enable the greatly enhanced mu W/kappa L of similar to 5.2 x 10(3) cm(3) K J(-1) V-1. The measured maximum zT of 0.24 at 488 K and the estimated zT of similar to 0.8 at 1173 K in (Sr0.2Ba0.2Ca0.2Pb0.2La0.2)TiO3 film are among the best of n-type thermoelectric oxides. These results reveal that the entropy engineering may be a promising strategy to decouple the carrier-phonon transport and achieve higher zT in thermoelectrics.
WOS关键词INITIO MOLECULAR-DYNAMICS ; TOTAL-ENERGY CALCULATIONS ; THERMAL-CONDUCTIVITY ; PERFORMANCE ; SRTIO3 ; TRANSPORT ; OXIDE ; GLASS ; DISPLACEMENT ; TEMPERATURE
资助项目National Natural Science Foundation of China (National Science Foundation of China)[52388201] ; Basic Science Center Project of the National Natural Science Foundation of China[12304040] ; National Science Foundation of China[2020YFA0406101] ; National Key Basic Research Program of China[52025025] ; National Key Basic Research Program of China[52072400] ; NSFC ; Shuimu Tsinghua Scholar Program[2023M742004] ; China Postdoctoral Science Foundation[52372075] ; National Natural Science Foundation of China[KF202304] ; State Key Laboratory of New Ceramic and Fine Processing Tsinghua University ; Beijing PARATERA Tech CO., Ltd.
WOS研究方向Science & Technology - Other Topics
语种英语
WOS记录号WOS:001304175400003
出版者NATURE PORTFOLIO
资助机构National Natural Science Foundation of China (National Science Foundation of China) ; Basic Science Center Project of the National Natural Science Foundation of China ; National Science Foundation of China ; National Key Basic Research Program of China ; NSFC ; Shuimu Tsinghua Scholar Program ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; State Key Laboratory of New Ceramic and Fine Processing Tsinghua University ; Beijing PARATERA Tech CO., Ltd.
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/135164]  
专题中国科学院合肥物质科学研究院
通讯作者Lin, Yuan-Hua
作者单位1.Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing, Peoples R China
2.Fuzhou Univ, Coll Mat Sci & Engn, Key Lab Ecomat Adv Technol, Fuzhou, Peoples R China
3.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing, Peoples R China
4.Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing, Peoples R China
5.Tsinghua Univ, Dept Engn Mech, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing, Peoples R China
6.Ecole Polytech Fed Lausanne, Theory & Simulat Mat THEOS, Lausanne, Switzerland
7.RICMASS Rome Int Ctr Mat Sci Superstripes, Via Sabelli 119A, Rome, Italy
8.Henan Polytech Univ, Sch Mat Sci & Engn, Henan Key Lab Mat Deep Earth Engn, Jiaozuo, Peoples R China
9.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei, Peoples R China
10.Beijing Univ Chem Technol, Coll Mat Sci & Engn, State Key Lab Organ Inorgan Composite, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Zheng, Yunpeng,Zhang, Qinghua,Shi, Caijuan,et al. Carrier-phonon decoupling in perovskite thermoelectrics via entropy engineering[J]. NATURE COMMUNICATIONS,2024,15.
APA Zheng, Yunpeng.,Zhang, Qinghua.,Shi, Caijuan.,Zhou, Zhifang.,Lu, Yang.,...&Lin, Yuan-Hua.(2024).Carrier-phonon decoupling in perovskite thermoelectrics via entropy engineering.NATURE COMMUNICATIONS,15.
MLA Zheng, Yunpeng,et al."Carrier-phonon decoupling in perovskite thermoelectrics via entropy engineering".NATURE COMMUNICATIONS 15(2024).

入库方式： OAI收割

来源：合肥物质科学研究院

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