New strategy for black phosphorus crystal growth through ternary clathrate
| Autor: | Li, Sheng, Liu, Xiaoyuan, Fan, Xing, Ni, Yizhou, Miracle, John, Theodoropoulou, Nikoleta, Sun, Jie, Chen, Shuo, Lv, Bing, Yu, Qingkai |
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| Rok vydání: | 2017 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1021/acs.cgd.7b01239 |
| Popis: | We are reporting a new synthetic strategy to grow large size black phosphorus (Black-P) crystals through a ternary clathrate Sn$_{24}$P$_{22-x}$I$_8$, under lower synthetic temperature and pressure. The Black-P crystals are found grown in situ at the site where the solid clathrate originally resides, which suggests chemical vapor mineralizer does not play a critical role for the Black-P formation. More detailed systematical studies has indicated the P vacancies in the framework of ternary clathrate Sn$_{24}$P$_{22-x}$I$_8$ is important for the subsequent Black-P from phosphorus vapors, and a likely Vapor-Solid-Solid (VSS) model is responsible for the Black-P crystal growth. The obtained room temperature mobility {\mu} is ~ 350 $cm^2/Vs$ from Hall measurements at mechanically-cleaved flake, where noticeable micro-cracks are visible. The obtained high mobility value further suggest the high quality of the Black-P crystals synthesized through this route. Comment: 11 pages, 4 figures, Cryst. Growth, Des (accepted) |
| Databáze: | arXiv |
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