期刊
JOURNAL OF CRYSTAL GROWTH
卷 453, 期 -, 页码 111-118出版社
ELSEVIER
DOI: 10.1016/j.jcrysgro.2016.08.025
关键词
Characterization; Crystal morphology; Single crystal growth; Inorganic compounds; Semiconducting materials; Solar cells
资金
- Commission Universitaire pour le Developpement (CUD)-Communaute Francaise de Belgique
- CUD-CIUF
The growth of WSe2 single crystals, using TeCl4 as transport agent was performed successfully from slowly cooled polycrystalline powders as precursors. The resulting single crystals were characterized by X-ray diffraction (XRD) and their surfaces examined by scanning electron microscopy (SEM) presented fewer defects than single crystals prepared from air-quenched polycrystalline powders. Energy Dispersive X-ray microanalysis (EDX), inductively coupled plasma (ICP) spectroscopy and X-ray photoelectron spectroscopy (XPS) revealed that the single crystals are homogeneous and stoichiometric. Electrical conductivity and photocurrent measurements have confirmed the semiconducting character of the single crystals and a photocurrent of 75 mA cm(-2) has been reached. In addition, single crystals With areas in the 25-100 mm(2) range can be obtained under the reported growth conditions. (C) 2016 Elsevier B.V. All rights reserved.
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