Mapping of Elements and Microstructures in a Crystal | Chapter 5 | New Frontiers in Physical Science Research Vol. 9

 Semiconductor crystal synthesized utilizing three elements together from group III and Group IV of the chemical table are attracting attention of the investigators due to their alterable energy band breach depending on the arrangement ratio. Elemental plan is one of the strong techniques to find exact composition percentage and the distribution of the materials in the crystal makeup.  By adopting the vertical directional combination (VDS) process, a III-V ternary most crystal (mold) using Indium, Antimony, and Bismuth as the source fabrics (InSb1-xBix) was formed. The developed ingot was therefore cut into wafers. Further, the surface description of the formed clear was done utilizing the well-polished wafers. With a resistivity of 1.00 X 10-3 ohm-cm, the resistivity measurement disclosed that the wafers were n-type semiconductors.  These wafers were lapped and refined to get mirror finish surface. After cleansing the wafers were etched by utilizing CP4 (HNO3: HF:CH3COOH: 5:3:3) and the modified CP4 (HNO3: HF: CH3COOH:H20::5:3:3:10) etchants.  The microstructures and defects superficial of the wafers (substrates) were studied utilizing metallurgical microscope. SEM and EDAX techniques were used for the further study of the microstructures observed all along the microscopic reasoning. Most of the surface is uniformly configured, but skilled are certain imperfections like black spots, dents, and seed boundaries. The results of the EDAX analysis show that Bi-rich rules have formed. By transporting an elemental test of the surface, the compositional elements' classification was investigated.  High determination SEM analysis of a dent reveals the composition of nano-crystals of content ~ 150nm.

Author(s) Details:

Dilip Maske,
Department of Physics, D. G. Ruparel College, Mumbai 400 016, India.

Manisha Deshpande,
Jai Hind College, Mumbai 400 020, India.

Vidula Angane,
Department of Physics, D. G. Ruparel College, Mumbai 400 016, India.

Dattatray Gadkari,
Department of Physics, D. G. Ruparel College, Mumbai 400 016, India.

Please see the link here: https://stm.bookpi.org/NFPSR-V9/article/view/9854