Enhanced Thermoelectric Performance through Tuning Bonding Energy in Cu2Se1-xSxLiquid-like Materials
文献类型：期刊论文
| 作者 | Zhao, Kunpeng1,2; Blichfeld, Anders Bank3,4; Chen, Hongyi1,2; Song, Qingfeng1,2; Zhang, Tiansong1; Zhu, Chenxi1,2; Ren, Dudi1; Hanus, Riley5; Qiu, Pengfei1; Iversen, Bo B.3 |
| 刊名 | Chemistry of Materials
 |
| 出版日期 | 2017 |
| 卷号 | 29期号:15页码:6367-6377 |
| ISSN号 | 08974756 |
| DOI | 10.1021/acs.chemmater.7b01687 |
| 英文摘要 | Thermoelectric materials require an optimal carrier concentration to maximize electrical transport and thus thermoelectric performance. Element doping and composition off-stoichiometry are the two general and effective approaches for optimizing carrier concentrations, which have been successfully applied in almost all semiconductors. In this study, we propose a new strategy called bonding energy variation to tune the carrier concentrations in Cu2Se-based liquid-like thermoelectric compounds. By utilizing the different bond features in Cu2Se and Cu2S, alloying S at the Se sites successfully increases the bonding energy to fix Cu atoms in the crystal lattice to suppress the formation of Cu vacancies, leading to greatly reduced carrier concentrations toward the optimal value. Via a combination of the lowered electrical and lattice thermal conductivities and the relatively good carrier mobility caused by the weak alloy scattering potential, ultrahigh zT values are achieved in slightly S-doped Cu2Se with a maximal value of 2.0 at 1000 K, 30% higher than that in nominally stoichiometric Cu2Se. © 2017 American Chemical Society. |
| 源URL | [http://ir.sic.ac.cn/handle/331005/25454]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 作者单位 | 1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China; 2.University of Chinese Academy of Sciences, Beijing; 100049, China; 3.Centre for Materials Crystallography, Department of Chemistry, INANO, Aarhus University, Langelandsgade 140, Aarhus C; DK-8000, Denmark; 4.Department of Materials Science and Engineering, NTNU Norwegian University of Science and Technology, Trondheim; NO-7491, Norway; 5.Department of Materials Science and Engineering, Northwestern University, Evanston; IL; 60208, United States; 6.Shanghai Institute of Materials Genome, Shanghai; 200444, China |
| 推荐引用方式 GB/T 7714 | Zhao, Kunpeng,Blichfeld, Anders Bank,Chen, Hongyi,et al. Enhanced Thermoelectric Performance through Tuning Bonding Energy in Cu2Se1-xSxLiquid-like Materials[J]. Chemistry of Materials,2017,29(15):6367-6377. |
| APA | Zhao, Kunpeng.,Blichfeld, Anders Bank.,Chen, Hongyi.,Song, Qingfeng.,Zhang, Tiansong.,...&Chen, Lidong.(2017).Enhanced Thermoelectric Performance through Tuning Bonding Energy in Cu2Se1-xSxLiquid-like Materials.Chemistry of Materials,29(15),6367-6377. |
| MLA | Zhao, Kunpeng,et al."Enhanced Thermoelectric Performance through Tuning Bonding Energy in Cu2Se1-xSxLiquid-like Materials".Chemistry of Materials 29.15(2017):6367-6377. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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