当前位置: X-MOL 学术Adv. Mater. › 论文详情
Synthesis of Crystalline Black Phosphorus Thin Film on Sapphire
Advanced Materials ( IF 21.95 ) Pub Date : 2018-01-03 , DOI: 10.1002/adma.201703748
Cheng Li, Ye Wu, Bingchen Deng, Yujun Xie, Qiushi Guo, Shaofan Yuan, Xiaolong Chen, Maruf Bhuiyan, Zishan Wu, Kenji Watanabe, Takashi Taniguchi, Hailiang Wang, Judy J. Cha, Michael Snure, Yingwei Fei, Fengnian Xia

Abstract

Black phosphorus (BP) has recently attracted significant attention due to its exceptional physical properties. Currently, high-quality few-layer and thin-film BP are produced primarily by mechanical exfoliation, limiting their potential in future applications. Here, the synthesis of highly crystalline thin-film BP on 5 mm sapphire substrates by conversion from red to black phosphorus at 700 °C and 1.5 GPa is demonstrated. The synthesized ≈50 nm thick BP thin films are polycrystalline with a crystal domain size ranging from 40 to 70 µm long, as indicated by Raman mapping and infrared extinction spectroscopy. At room temperature, field-effect mobility of the synthesized BP thin film is found to be around 160 cm2 V−1 s−1 along armchair direction and reaches up to about 200 cm2 V−1 s−1 at around 90 K. Moreover, red phosphorus (RP) covered by exfoliated hexagonal boron nitride (hBN) before conversion shows atomically sharp hBN/BP interface and perfectly layered BP after the conversion. This demonstration represents a critical step toward the future realization of large scale, high-quality BP devices and circuits.

Thumbnail image of graphical abstract

Synthesis of highly crystalline thin-film black phosphorus (BP) on 5 mm sapphire substrates is realized through the conversion from red phosphorus. A field-effect transistor fabricated on synthesized BP thin film shows field-effect mobility of around 160 cm2 V−1 s−1 at room temperature. Red phosphorus covered by exfoliated hexagonal boron nitride (hBN) before conversion shows atomically sharp hBN/BP interface and perfectly layered BP after the conversion.

更新日期:2018-01-03

 

分享到
评论: 0
期刊列表
深圳大学可拉伸电子研究中心招聘专职研究员
西湖大学邓力教授课题组招聘启事
天合科研
【问答】请问离子液体的TGA分析有哪些特征?
2017年中科院JCR分区化学大类列表
试剂库存管理
化合物查询
down
wechat
bug