Development of large size high-purity germanium crystal growth

2012 ◽  
Vol 352 (1) ◽  
pp. 27-30 ◽  
Author(s):  
Guojian Wang ◽  
Yongchen Sun ◽  
Gang Yang ◽  
Wenchang Xiang ◽  
Yutong Guan ◽  
...  
Keyword(s):  
Crystal Growth ◽  
High Purity ◽  
Germanium Crystal ◽  
Large Size ◽  
High Purity Germanium

scholarly journals High purity germanium crystal growth at the University of South Dakota

2015 ◽  
Vol 606 ◽  
pp. 012012 ◽  
Author(s):  
Guojian Wang ◽  
Hao Mei ◽  
Dongming Mei ◽  
Yutong Guan ◽  
Gang Yang
Keyword(s):  
Crystal Growth ◽  
South Dakota ◽  
High Purity ◽  
Germanium Crystal ◽  
High Purity Germanium ◽  
University Of South Dakota ◽  
The University

Dislocation density control in high-purity germanium crystal growth

2014 ◽  
Vol 393 ◽  
pp. 54-58 ◽  
Author(s):  
Guojian Wang ◽  
Yutong Guan ◽  
Hao Mei ◽  
Dongming Mei ◽  
Gang Yang ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Dislocation Density ◽  
High Purity ◽  
Germanium Crystal ◽  
Density Control ◽  
High Purity Germanium

scholarly journals Crystal growth and detector performance of large size High-purity Ge crystals

2015 ◽  
Vol 39 ◽  
pp. 54-60 ◽  
Author(s):  
Guojian Wang ◽  
Mark Amman ◽  
Hao Mei ◽  
Dongming Mei ◽  
Klaus Irmscher ◽  
...  
Keyword(s):  
Crystal Growth ◽  
High Purity ◽  
Detector Performance ◽  
Large Size

scholarly journals Optical Methods in Orientation of High-Purity Germanium Crystal

2013 ◽  
Vol 03 (02) ◽  
pp. 60-63 ◽  
Author(s):  
Guojian Wang ◽  
Yongchen Sun ◽  
Yutong Guan ◽  
Dongming Mei ◽  
Gang Yang ◽  
...  
Keyword(s):  
High Purity ◽  
Optical Methods ◽  
Germanium Crystal ◽  
High Purity Germanium

scholarly journals Numerical Analysis of Difficulties of Growing Large-Size Bulk β-Ga2O3 Single Crystals with the Czochralski Method

Crystals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 25
Author(s):  
Xia Tang ◽  
Botao Liu ◽  
Yue Yu ◽  
Sheng Liu ◽  
Bing Gao
Keyword(s):  
Crystal Growth ◽  
Single Crystals ◽  
Czochralski Method ◽  
Liquid Interface ◽  
Spiral Growth ◽  
Growth Time ◽  
Large Size ◽  
Crystal Diameter ◽  
Solid Liquid Interface ◽  
Solid Liquid

The difficulties in growing large-size bulk β-Ga2O3 single crystals with the Czochralski method were numerically analyzed. The flow and temperature fields for crystals that were four and six inches in diameter were studied. When the crystal diameter is large and the crucible space becomes small, the flow field near the crystal edge becomes poorly controlled, which results in an unreasonable temperature field, which makes the interface velocity very sensitive to the phase boundary shape. The effect of seed rotation with increasing crystal diameter was also studied. With the increase in crystal diameter, the effect of seed rotation causes more uneven temperature distribution. The difficulty of growing large-size bulk β-Ga2O3 single crystals with the Czochralski method is caused by spiral growth. By using dynamic mesh technology to update the crystal growth interface, the calculation results show that the solid–liquid interface of the four-inch crystal is slightly convex and the center is slightly concave. With the increase of crystal growth time, the symmetry of cylindrical crystal will be broken, which will lead to spiral growth. The numerical results of the six-inch crystal show that the whole solid–liquid interface is concave and unstable, which is not conducive to crystal growth.

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