Germanium crystals have been prepared by chemical vapour transport (CVT), usingthree different procedures: the Stationary Temperature Profile (STP), the Linear Time-varying Temperature Profile (LTVTP) and the LTVTP followed by the OscillatoryTemperature Profile (OTP) in the same run. With the optimization of the growthparameters we have obtained a progressive increase of the crystal sizes and areduction of the crystalline nuclei during the primary nucleation. The final result wasonly one crystal grown using the Linear Time-varying Temperature Profile associatedwith Oscillatory Temperature Profile (LTVTP+OTP). The crystals morphology observedby Scanning Electron Microscopy (SEM) shows details of their shape typical of cubicstructure. The structural properties were studied by X-ray diffraction and indicate thatall samples have the diamond cubic structure.

Growth of germanium crystals by time-varing temperature profile, CVT methods

Giovanni Attolini;Patrizia Ferro;Giovanna Trevisi
2022

Abstract

Germanium crystals have been prepared by chemical vapour transport (CVT), usingthree different procedures: the Stationary Temperature Profile (STP), the Linear Time-varying Temperature Profile (LTVTP) and the LTVTP followed by the OscillatoryTemperature Profile (OTP) in the same run. With the optimization of the growthparameters we have obtained a progressive increase of the crystal sizes and areduction of the crystalline nuclei during the primary nucleation. The final result wasonly one crystal grown using the Linear Time-varying Temperature Profile associatedwith Oscillatory Temperature Profile (LTVTP+OTP). The crystals morphology observedby Scanning Electron Microscopy (SEM) shows details of their shape typical of cubicstructure. The structural properties were studied by X-ray diffraction and indicate thatall samples have the diamond cubic structure.
2022
Istituto dei Materiali per l'Elettronica ed il Magnetismo - IMEM
Crystal growth, chemical vapour deposition, Germanium
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/458824
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