Dangerous Bonds Individual of Hydrogenated Amorphous Silicon and Defect Absorption Spectra
Abstract
In this work, defect absorption spectra for defects characteristic of hydrogenated amorphous silicon are theoretically studied. It is shown that in order to determine defect absorption spectra using the Kubo-Greenwood formula, the indefinite integral in this formula must be written in a certain form. It was discovered that electronic transitions involving defect states are divided into two parts depending on the energy of absorbed photons. The values of the partial defect absorption spectrum at low energies of absorbed photons have almost no effect on the overall defect absorption spectrum. It has been established that the main role in determining the defect absorption spectrum is played by partial spectra determined by optical transitions of electrons between allowed bands and defects. It is shown that with a power-law distribution of the density of electronic states in allowed bands, the spectra of optical transitions between them and defects do not depend on the value of this power.
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References
V.I. Fistul, Introduction to semiconductor physics, (Vysshaya shkola, Moscow, 1984). (in Russian)
M.S. Ablova, G.S. Kulikov, and S.K. Persheev, “Metastable states of undoped amorphous hydrogenated, created by γ irradiation,” FTP, 36(8), 1001-1003 (2002). (in Russian)
M. Gunes, and Ch.R. Wronski, “Differences in densities of charged defect states and kinetics of Staebler-Wronski effect in undoped (nontrinsic) hydrogenated amorphous silicon thin films,” J. Appl. Phys. 81(8), 3526-3536 (1997). https://doi.org/10.1063/1.365000
R.G. Ikramov, A.A. Mamaxanov, M.A. Nuriddinova, R.M. Jalolov, Kh.A. Muminov, and B.Q. Sultonov, “Calculation of the interband absorption spectrum of amorphous semiconductors using the Kubo-Greenwood formula,” Journal of Applied Science and Engineering, 25(5), 767-772 (2022). http://jase.tku.edu.tw/articles/jase-202210-25-5-0007
G.D. Cody, “Hydrogenated Amorphous Silicon, Part B, Optical Properties,” in: Semiconductors and Semimetals, vol. 21, edited by J.I. Pankove, (Academic Press Inc., Orlando, 1984).
S.K. O’Leary, “On the relationship between the distribution of electronic states and the optical absorption spectrum in amorphous semiconductors,” Solid State Commun. 109, 589–594 (1999). https://doi.org/10.1016/S0038-1098(98)00605-X
S. Zainobidinov, R.G. Ikramov, and R.M. Zhalalov, “Urbach energy and tails of the density of states of amorphous semiconductors,” Journal of Applied Spectroscopy, 78(2), 223-227 (2011). https://doi.org/10.1007/s10812-011-9450-9
R.G. Ikramov. “Distribution function of electron states of dangling bonds in amorphous semiconductors,” Estestv. Tekhn. Nauki, 6, 53 (2007) (in Russian).
F. Orapunt, and S.K. O'Leary, “A quantitative characterization of the optical absorption spectrum associated with hydrogenated amorphous silicon,” Mater Electron. 20, 1033-1038 (2009). https://doi.org/10.1007/s10854-008-9825-8
S. Zainobidinov, R.G. Ikramov, R.M. Zhalalov, and M.A. Nuritdinova, “Distribution of electron density of states in allowed bands and interband absorption in amorphous semiconductors,” Optics and spectroscopy, 110(5), 762–766 (2011). https://doi.org/10.1134/S0030400X11030271
R.G. Ikramov, M.A. Nuriddinova, and Kh.A. Muminov, “Calculation of the density of electronic states in the valence band from the experimental spectrum of interband absorption of amorphous semiconductors,” Journal of Applied Spectroscopy, 88(3), 378 382 (2021). https://doi.org/10.1007/s10812-021-01200-9
Copyright (c) 2023 Rustamjon G. Ikramov, Khurshidbek A. Muminov, Mashkhura A. Nuritdinova, Bobur Q. Sutonov, Oybek T. Kholmirzayev
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