期刊論文
| 學年 | 108 |
|---|---|
| 學期 | 2 |
| 出版（發表）日期 | 2020-05-26 |
| 作品名稱 | Study of Structural, Thermoelectric, and Photoelectric Properties of Layered Tin Monochalcogenides SnX (X = S, Se) for Energy Application |
| 作品名稱（其他語言） | |
| 著者 | Ching-Hwa Ho; Wen-Yao Lin; Liang-Chiun Chao; Kuei-Yi Lee; Jun Inagaki; Hung-Chung Hsueh |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | ACS Applied Energy Materials 3(5), p.4896−4905 |
| 摘要 | SnS and SnSe are renowned energy materials that are applied for photoelectric and thermoelectric conversions owing to their suitable band gap, close to 1 eV, and superior figure of merit (ZT), larger than 0.1. In this paper, high-quality layered SnX (X = S, Se) crystals have been successfully grown by the chemical vapor transport (CVT) method. The crystal structure and band structure of SnX are studied, and their photoelectric and thermoelectric properties are characterized. In Raman measurement, four vibration modes with distinct angle-polarization dependence are simultaneously detected by both SnS and SnSe, verifying their similar orthorhombic layered structure with in-plane anisotropy. In-plane anisotropy of band-edge and interband transitions along a and b axes has also been measured experimentally using polarized thermoreflectance (PTR) from 0.7 to 5 eV. The anisotropic band edges of layered SnX (X = S, Se) are well matched and reproduced by first-principles calculation. Hall-effect and thermoelectric measurements revealed that SnX are p-type semiconductors with a high carrier density, larger than 1017 cm−3. According to the measurement results of the surface photovoltaic (SPV) response and ZT value, layered SnS can have a superior SPV (8.5 μV/μW) response ∼12× higher than that of SnSe, while SnSe has a ZT of 0.16, ∼4× larger than that of SnS in SnX (X = S, Se). Layered SnSe and SnS could possess great feasibility for application in thermoelectric power generation and solar energy conversion. |
| 關鍵字 | 2D semiconductor;thermoelectric material;solar-cell material;band structure;in-plane anisotropy |
| 語言 | en_US |
| ISSN | 2574-0962 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | Ching-Hwa Ho and Hung-Chung Hsueh(薛宏中) |
| 審稿制度 | 是 |
| 國別 | USA |
| 公開徵稿 | |
| 出版型式 | ,電子版,紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/118759 ) |