Karazhanov, Smagul

The aim of the theoretical activity is to explore properties of solar cell materials using accurate density functional calculations. More specifically the following topics are planned to study:

• Electronic structure, chemical bonding, structural properties, optical properties, and transport properties of solar cell materials
• Transparent conducting oxides (TCOs)
• Defects and impurities in TCOs and solar cell materials
• Hydrogen and other shallow and deep level defects
• Hydrogen related complexes
• Vacancies
• Dislocation engineering
• Nanostructures:
  • Quantum dots
  • Quantum wires
  • Quantum wells
  • Voids
• Band offset between different solar cell materials and doping limit
• Hydrides
  • Novel application of hydrides in semiconductor electronics
  • Defects in hydrides

The following software have been used in the theoretical activity:

• Materials Studio
• Vienna Ab-initio Simulation Package (VASP-PAW)
• Tight Binding Linear Muffin-tin Orbital Method (TB-LMTO)
• Full Potential Linear Muffin-tin Orbital  Method (FP-LMTO).

List of publications for 2008

1. S. Zh. Karazhanov and A. Ulyashin. Similarity of electronic structure and optical properties of Mg2NiH4 and Si. Euro Phys. Lett. 82, 4, 82004 (2008).
2. S. Zh. Karazhanov, A. Ulyashin, P. Ravindran, P. Vajeeston. Semiconducting hydrides. Euro Phys. Lett. 82, 1, 17006 (2008).
3. S. Zh. Karazhanov and A. Ulyashin. Role of diatomic Hydrogen in electronic structure of ZnO. Phys. Rev. B. Accepted for publication (2008).
4. S. Zh. Karazhanov, A. Davletova, and A. Ulyashin. Strain-induced modulation of band structure of Silicon. J. Appl. Phys. Accepted for publication (2008).
5. A. Davletova and S. Zh. Karazhanov. Open-circuit voltage decay transient in dislocation-engineered Si. J. Phys. D: Appl. Phys. Accepted for publication (2008).
6. S. Zh. Karazhanov, A. Ulyashin, P. Ravindran, P. Vajeeston. Hydrides as materials for semiconductor electronics. Phil. Mag. (2008). Accepted for publication (2008).
7. A. Davletova and S. Zh. Karazhanov. ????. Inorganic Materials. Accepted for publication (2008).
8. A. Davletova and S. Zh. Karazhanov. A study of electrical properties of dislocation engineered Si processed by ultrasound. Submitted (2008).
9. A. Davletova and S. Zh. Karazhanov. Measurement of diffusion length of charge carriers in dislocation engineered Si processed by ultrasound. Mater. Sci. Eng. (2008).
10. S. Zh. Karazhanov and A. Ulyashin. Similarity of optical properties of hydrides and semiconductors for antireflection coatings. Submitted to J. Phys. D: Appl. Phys. (2008).

Patents
1. A. Ulyashin, S. Zh. Karazhanov, and A. Holt. Patent application for the discovery of “hydride electronics” (2008).