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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51573

Title: Anisotropy of the spectroscopy properties of the wurtz-stannite Cu2ZnGeS4 single crystals
Authors: S. Levcenco
D. Dumcenco
Y.S. Huang
K.K. Tiong
C.H. Du
Contributors: 國立臺灣海洋大學:電機工程學系
Keywords: Crystal growth
Optical properties
Optical spectroscopy
Date: 2011-11
Issue Date: 2018-12-07T06:21:17Z
Publisher: Optical Materials
Abstract: Abstract: In this study, the near band edge anisotropic optical properties of wurtz-stannite (WS) Cu2ZnGeS4 single crystals were characterized using polarization-dependent transmittance and electrolyte electroreflectance (EER) techniques. Single crystals of Cu2ZnGeS4 were grown by chemical vapor transport method using iodine as a transport agent. Analysis of absorption spectra revealed indirect allowed transitions for Cu2ZnGeS4 with the band gaps of 2.02 (2.07) and 2.08 (2.14) eV for E‖b and Е‖a polarization configurations at 300 (10) K. The room-temperature EER spectra in the vicinity of the direct band edge showed anisotropic transitions at around 2.38, 2.44 and 2.45 eV for E‖b, Е‖a and Е‖c polarizations, respectively. Based on the experimental observations and recent band-structure calculations a plausible band diagram near band edge of WS-Cu2ZnGeS4 was constructed.
Relation: 34(1) pp.183-188
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51573
Appears in Collections:[電機工程學系] 期刊論文

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