Improved Thermoelectric Performance in Nonstoichiometric Cu2+delta Mn1-delta SnSe4 Quaternary Diamondlike Compounds
文献类型：期刊论文
| 作者 | Song, Qingfeng1; Qiu, Pengfei; Chen, Hongyi1,2; Zhao, Kunpeng1; Ren, Dudi; Shi, Xun; Chen, Lidong |
| 刊名 | ACS APPLIED MATERIALS & INTERFACES
 |
| 出版日期 | 2018 |
| 卷号 | 10期号:12页码:10123 |
| 关键词 | thermoelectric diamondlike nonstoichiometric doping refinement |
| ISSN号 | 1944-8244 |
| DOI | 10.1021/acsami.7b19791 |
| 英文摘要 | A novel quaternary Cu2MnSnSe4 diamondlike thermoelectric material was discovered recently based on the pseudocubic structure engineering. In this study, we show that introducing off-stoichiometry in Cu2MnSnSe4 effectively enhances its thermoelectric performance by simultaneously optimizing the carrier concentrations and suppressing the lattice thermal conductivity. A series of nonstoichiometric Cu2+delta Mn1-delta SnSe4 (delta = 0, 0.025, 0.05, 0.075, and 0.1) samples has been prepared by the melting-annealing method. The X-ray analysis and the scanning electron microscopy measurement show that all nonstoichiometric samples are phase pure. The Rietveld refinement demonstrates that substituting part of Mn by Cu well maintains the structure distortion parameter eta close to 1, but it induces obvious local distortions inside the anion-centered tetrahedrons. Significantly improved carrier concentrations are observed in these nonstoichiometric Cu2+delta Mn1-delta SnSe4 samples, pushing the power factors to the theoretical maximal value predicted by the single parabolic model. Substituting part of Mn by Cu also reduces the lattice thermal conductivity, which is well interpreted by the Callaway model. Finally, a maximal thermoelectric dimensionless figure-of-merit zT around 0.60 at 800 K has been obtained in Cu2.1Mn0.9SnSe4, which is about 33% higher than that in the Cu2+delta Mn1-delta SnSe4 matrix compound. |
| 学科主题 | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| WOS记录号 | WOS:000428972700027 |
| 出版者 | AMER CHEMICAL SOC |
| 资助机构 | This work was financially supported by the National Natural Science Foundation of China (NSFC) under the No. 51625205, the Key Research Program of Chinese Academy of Sciences (Grant No. KFZD-SW-421), International S&T Cooperation Program of China (2015DFA51050), and the Shanghai Government (Grant Nos. 15JC1400301 and 16XD1403900). ; This work was financially supported by the National Natural Science Foundation of China (NSFC) under the No. 51625205, the Key Research Program of Chinese Academy of Sciences (Grant No. KFZD-SW-421), International S&T Cooperation Program of China (2015DFA51050), and the Shanghai Government (Grant Nos. 15JC1400301 and 16XD1403900). |
| 源URL | [http://ir.sic.ac.cn/handle/331005/25077]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China |
| 推荐引用方式 GB/T 7714 | Song, Qingfeng,Qiu, Pengfei,Chen, Hongyi,et al. Improved Thermoelectric Performance in Nonstoichiometric Cu2+delta Mn1-delta SnSe4 Quaternary Diamondlike Compounds[J]. ACS APPLIED MATERIALS & INTERFACES,2018,10(12):10123, 10131. |
| APA | Song, Qingfeng.,Qiu, Pengfei.,Chen, Hongyi.,Zhao, Kunpeng.,Ren, Dudi.,...&Chen, Lidong.(2018).Improved Thermoelectric Performance in Nonstoichiometric Cu2+delta Mn1-delta SnSe4 Quaternary Diamondlike Compounds.ACS APPLIED MATERIALS & INTERFACES,10(12),10123. |
| MLA | Song, Qingfeng,et al."Improved Thermoelectric Performance in Nonstoichiometric Cu2+delta Mn1-delta SnSe4 Quaternary Diamondlike Compounds".ACS APPLIED MATERIALS & INTERFACES 10.12(2018):10123. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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