On the effects of furnace gradients on interface shape during the growth of cadmium zinc telluride in EDG furnaces

Lun, Lisa; Yeckel, Andrew; Reed, M. D.; Szeles, Csaba; Daoutidis, Pródromos; Derby, Jeffrey J.

doi:10.1016/j.jcrysgro.2006.01.006

Cited by 28 publications

(20 citation statements)

References 29 publications

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“…There have been several papers which have considered methods to control the meltcrystal interface shape [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Jasinski et al [2] analyzed how the position of the melt-crystal interface within the furnace gradient zone can affect its shape.…”

Section: Introductionmentioning

confidence: 99%

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Interface shape control using localized heating during Bridgman growth

Volz

Mazuruk

Aggarwal

et al. 2009

Journal of Crystal Growth

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Numerical calculations were performed to assess the effect of localized radial heating on the melt-crystal interface shape during vertical Bridgman growth. System parameters examined include the ampoule, melt and crystal thermal conductivities, the magnitude and width of localized heating, and the latent heat of crystallization. Concave interface shapes, typical of semiconductor systems, could be flattened or made convex with localized heating. Although localized heating caused shallower thermal gradients ahead of the interface, the magnitude of the localized heating required for convexity was less than that which resulted in a thermal inversion ahead of the interface. A convex interface shape was most readily achieved with ampoules of lower thermal conductivity. Increasing melt convection tended to flatten the interface, but the amount of radial heating required to achieve a convex interface was essentially independent of the convection intensity.

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Section: Introductionmentioning

confidence: 99%

“…Lun et al [14] analyzed the growth of cadmium zinc telluride in a Bridgman-type furnace. They considered a range of applied axial thermal profiles and a perturbation to the profile below the melting point.…”

Section: Introductionmentioning

confidence: 99%

Interface shape control using localized heating during Bridgman growth

Volz

Mazuruk

Aggarwal

et al. 2009

Journal of Crystal Growth

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“…The main technical achievement in these models is the ability to accurately model the physics of CdTe and CZT in terms of heat transfer, including optical transparency, and to be able to couple two modeling scales in a selfconsistent manner. These models can include magnetic fields [11][12][13][14][15] and crucible rotations [16][17][18][19][20][21][22] and can be used to guide the furnace growth parameters to obtain a preferred flat or convex 1 growth interface for CdTe or CZT [23]. The use of continuum models has led to improved growth of CZT or CdTe crystals but the level of defects in even the best CZT crystals is too high, on average, to allow the routine production of high-resolution detectors [24][25][26][27][28] with theoretical energy resolution.…”

Section: Overview Of Problemmentioning

confidence: 99%

Simulating Interface Growth and Defect Generation in CZT – Simulation State of the Art and Known Gaps

Henager¹,

Gao²,

Hu³

et al. 2012

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“…Low-pressure (LP) Bridgman and other ampoule-based techniques of crystal growth using vertical gradient freezing are used to grow nominally single-crystal CdZnTe (CZT) high-resistivity materials for radiation detectors [1,2]. As part of a project to study and model this growth process, a single growth experiment was performed on pure Ge in order to determine furnace growth parameters and as a furnace systems test.…”

Section: Introductionmentioning

confidence: 99%

“…Large grains and twins within grains are revealed. The tip appears to be a single-crystal region for several millimeters of growth and then apparent sidewall nucleated grains are introduced into the growing ingot 2. Diamond Wire Technology, LLC, 1605 South Murray Blvd., Colorado Springs, CO 80916.…”

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confidence: 99%