Investigation of seeded vertical gradient freeze (VGF) growth of CdZnTe bulk crystals

Date

2022-04-15

Author

Balbaşı, Özden Başar
Ünal, Mustafa
Genç, Ayşe Merve
ÇELİK, GÜLÇİN
Parlak, Mehmet
Turan, Raşit

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

232
views

0
downloads

© 2022 Elsevier B.V.Due to the requirement for superheating above the melting point in the homogenization process of CdZnTe material, complete seed melting remains as a significant problem for the seeded vertical gradient freeze (VGF) growth of CdZnTe. In addition, due to the typical low single crystal yields in VGF growth of CdZnTe, obtaining single crystal seed material with desired geometries could be considered as a challenge. In this study, single crystal CdZnTe seeds of cylindrical geometry with 10 mm diameter and up to 30 mm length were successfully obtained using a Computer Numerical Control (CNC) cutting system. Moreover, to avoid complete seed melting, a novel design of the growth crucible and support system along with radiation shielding around seed region is employed. Temperature profiling and growth experiments were conducted to observe seed melting and seeded crystal growth of CdZnTe. Initial results of a seeded VGF growth using a single crystal CdZnTe seed is reported.

Subject Keywords

A2. Gradient freeze technique, A2. Growth from melt, A2. Seed crystals, B1. CdZnTe, B2. Semiconducting II-VI materials, B3. Radiation detectors

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85124461919&origin=inward
https://hdl.handle.net/11511/96971

Journal

Journal of Crystal Growth

DOI

https://doi.org/10.1016/j.jcrysgro.2022.126573

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Investigation of physical properties of quaternary AgGa0.5In0.5Te2 thin films deposited by thermal evaporation Karaagac, H.; Parlak, Mehmet (Elsevier BV, 2010-8) The aim of this study is to understand the structural, optical and photo-electrical properties of the quaternary chalcogenide AgGa 0.5In0.5Te2 thin films deposited onto the glass substrates by thermal evaporation of the single crystalline powder. Energy dispersive X-ray analysis (EDXA) showed remarkable change in atomic percentage of the constituent elements after annealing. The X-ray diffraction (XRD) of the films below the annealing temperature of 300°C indicated the polycrystalline structure with co-exis...
Determination of trapping parameters of thermoluminescent glow peaks of semiconducting Tl2Ga2S3Se crystals IŞIK, MEHMET; YILDIRIM, TACETTİN; Hasanlı, Nızamı (2015-07-01) Thermoluminescence (TL) properties of Tl2Ga2S3Se layered single crystals were researched in the temperature range of 290-770 K. U glow curve exhibited two peaks with maximum temperatures of similar to 373 and 478 K. Curve fitting, initial rise and peak shape methods were used to determine the activation energies of the trapping centers associated with these peaks. Applied methods were in good agreement with the energies of 780 and 950 meV. Capture cross sections and attempt-to-escape frequencies of the trap...
Three Dimensional Grain Boundary Modeling in Polycrystalline Plasticity Yalçınkaya, Tuncay; Firat, Ali Osman (2018-04-25) At grain scale, polycrystalline materials develop heterogeneous plastic deformation fields, localizations and stress concentrations due to variation of grain orientations, geometries and defects. Development of inter-granular stresses due to misorientation are crucial for a range of grain boundary (GB) related failure mechanisms, such as stress corrosion cracking (SCC) and fatigue cracking. Local crystal plasticity finite element modelling of polycrystalline metals at micron scale results in stress jumps at...
Evaluation of the alkali reactivity of cherts from Turkey Bektas, F.; Topal, Tamer; Göncüoğlu, Mehmet Cemal; TURANLI, LUTFULLAH (2008-06-01) Chert, which is a crypto and/or microcrystalline sedimentary rock, may lead to alkali-silica reaction in concrete when the conditions are favorable. However, cherts vary in composition and consequently may demonstrate different reaction characteristic. In this study, eight different chert types were investigated. Accelerated mortar bar test, ASTM C 1260, was performed on aggregate blends of limestone and chert. Ten sets of mortar bars with varying amount of cherts, 1 to 100%, were tested for each chert type...
Measurement of soot surface growth kinetics Yozgatlıgil, Ahmet (Informa UK Limited, 2008-01-01) Surface growth is one of the major steps in the soot formation processes where most of the total mass is formed. Freshly generated soot from an ethylene diffusion flame was sampled and mixed with ethylene in a flow tube at elevated temperatures and using nitrogen as the carrier gas. The changes in the size of the soot particles after hydrocarbon addition were measured using a differential mobility analyzer. These measurements showed a significant mass increase of soot particles as a result of the hydrocarbo...

Citation Formats

Ö. B. Balbaşı, M. Ünal, A. M. Genç, G. ÇELİK, M. Parlak, and R. Turan, “Investigation of seeded vertical gradient freeze (VGF) growth of CdZnTe bulk crystals,” Journal of Crystal Growth, vol. 584, pp. 0–0, 2022, Accessed: 00, 2022. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85124461919&origin=inward.