| Roles of Anion Sites in High-Performance GeTe Thermoelectrics | |
| Li, Meng1,2; Xu, Sheng-Duo1; Hong, Min3; Lyu, Wan-Yu2,3; Wang, Yuan1; Dargusch, Matthew1; Zou, Jin1,4; Cheng, Hui-Ming5,6; Chen, Zhi-Gang2 | |
| Corresponding Author | Chen, Zhi-Gang(zhigang.chen@qut.edu.au) |
| 2022-09-22 | |
| Source Publication | ADVANCED FUNCTIONAL MATERIALS
 |
| ISSN | 1616-301X |
| Pages | 8 |
| Abstract | Cationic doping is mainly used to improve the performance of rocksalt-structured GeTe thermoelectric materials. However, its counterpart anionic doping is scarcely facilitated. Here, a comprehensive discussion is provided on doping at the anion site of rocksalt-structured thermoelectric materials, surrounding its influence on bonding mechanisms, carrier and phonon transport characteristics, and thermoelectric figure-of-merit. To verify the viewpoint, a modified flux-assist method is adopted to synthesize anionic Iodine (I) doped GeTe samples, which show comparably optimized electrical and thermal properties with that of cationic Antimony (Sb) or Bismuth (Bi) doped GeTe samples. Further combining cationic Bi and anionic I co-doping, an enhanced figure-of-merit from 0.8 in pristine GeTe to 2.5 at 675 K can be realized in 8% (Bi and I) co-doped GeTe, which corresponds to a maximum heat-to-electricity conversion efficiency of 14.6% under a temperature difference of 430 K. This work rationalizes the influence of anionic doping on the electrical and thermal properties of the rocksalt-structured materials, which serves as an effective yet previously neglected strategy toward high-performance GeTe thermoelectrics. |
| Keyword | anionic dopants conversion efficiencies figure-of-merit GeTe thermoelectrics |
| Funding Organization | Australian Research Council ; QUT capacity building professor program ; HBIS-UQ Innovation Centre for Sustainable Steel (ICSS) project |
| DOI | 10.1002/adfm.202208579 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Australian Research Council ; QUT capacity building professor program ; HBIS-UQ Innovation Centre for Sustainable Steel (ICSS) project |
| WOS Research Area | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| WOS Subject | Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter |
| WOS ID | WOS:000858002000001 |
| Publisher | WILEY-V C H VERLAG GMBH |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/175449 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Chen, Zhi-Gang |
| Affiliation | 1.Univ Queensland, Sch Mech & Min Engn, Brisbane, Qld 4072, Australia 2.Queensland Univ Technol, Sch Chem & Phys, Brisbane, Qld 4072, Australia 3.Univ Southern Queensland, Ctr Future Mat, Springfield Cent, Qld 4300, Australia 4.Univ Queensland, Ctr Microscopy & Microanal, Brisbane, Qld 4072, Australia 5.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 6.Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen 518055, Peoples R China |
| Recommended Citation GB/T 7714 | Li, Meng,Xu, Sheng-Duo,Hong, Min,et al. Roles of Anion Sites in High-Performance GeTe Thermoelectrics[J]. ADVANCED FUNCTIONAL MATERIALS,2022:8. |
| APA | Li, Meng.,Xu, Sheng-Duo.,Hong, Min.,Lyu, Wan-Yu.,Wang, Yuan.,...&Chen, Zhi-Gang.(2022).Roles of Anion Sites in High-Performance GeTe Thermoelectrics.ADVANCED FUNCTIONAL MATERIALS,8. |
| MLA | Li, Meng,et al."Roles of Anion Sites in High-Performance GeTe Thermoelectrics".ADVANCED FUNCTIONAL MATERIALS (2022):8. |
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