期刊論文
| 學年 | 111 |
|---|---|
| 學期 | 2 |
| 出版（發表）日期 | 2023-05-10 |
| 作品名稱 | Structural, opto-electrical, and band-edge properties of full-series multilayer SnS1-xSex (0≤x≤1) compounds with strong in-plane anisotropy |
| 作品名稱（其他語言） | |
| 著者 | Hsueh, Hung-chung |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Materials Today Advances 18 |
| 摘要 | Two-dimensional (2D) semiconductors with black phosphorus (BP) structure have recently received considerable attention on the realization of polarized optoelectronic device, axial-dependent carrier transport, and asymmetric 2D electronic and energy device owing to the strong in-plane anisotropy presented in the van der Waal plane. In this work, multilayered SnS1-xSex chalcogenides of x ¼ 0, 0.2, 0.4, 0.5, 0.6, 0.8 and x ¼ 1 were grown by chemical vapor transport and then exfoliated on a SiO2/Si substrate for further optical characterization. Polarized micro-Raman experiment and theoretical Raman-mode calculation simultaneously demonstrate strong in-plane anisotropy with the maximum Raman intensity of the armchair (AM) chain vibration mode (Ag) shows mutual orthogonality to the zigzag (ZZ) chain-oriented mode (B1g) in the full-series multilayer SnS1-xSex (0 x 1). For the intermediate compositions between x ¼ 0.2 and x ¼ 0.8, a crucial physical mechanism as “symmetry breaking” has been proposed to account for the increased number of separated Ag and B1g modes with different energies as compared to those detected for the binary compounds of orthorhombic SnS and SnSe. For the band-edge anisotropy, the bandgap value of ZZ polarized direction is shown to be lower than that of the AM direction for each of the SnS1-xSex compounds evidenced by polarized-thermoreflectance experiments and first-principles calculations. |
| 關鍵字 | Phosphorene structure；Tin monochalcogenides；In-plane anisotropy；Polarized Raman spectroscopy；Band-edge structure |
| 語言 | en |
| ISSN | 2590-0498 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | Hung-Chung Hsueh (薛宏中), Ching-Hwa Ho |
| 審稿制度 | 是 |
| 國別 | NLD |
| 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/987654321/124089 ) |