Structural and photoluminescence investigation of ZnSe nanocrystals dispersed in organic and inorganic matrices

Benmehdi, N.; Chelouche, A.; Touam, Tahar; Djouadi, D.; Doghmane, A.

doi:10.1007/s10854-016-4456-y

Cited by 7 publications

(1 citation statement)

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“…To solve this quandary, we used definite additives (Ge and Zn) to form a ternary glassy system with selenium, that in turn gives milder aging effects and considerable sensitivity at high temperatures of crystallization and to obtain desirable phases after heat treatment of these alloys. The ZnSe phase attracts increasing attention because of its large band gap of 2.7 eV at room temperature, its large exciton binding energy in comparison with other chalcogenides [13][14][15], and its high luminescence efficiency, which make it a potential candidate for use in optic and optoelectronic devices [15]. The GeSe phase has also found great attention in the field of photocatalysis due to its narrow direct band gap that well overlaps with the solar spectrum, faint cost, chemical stability, as well as being an environmentally friendly material [16].…”

Section: Introductionmentioning

confidence: 99%

Optical and dispersion parameters of Ge-Zn-Se glassy films for VIS and FTIR Applications

Ibraheem¹,

Aly²

2022

Phys. Scr.

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Different 〖(GeZn)〗_(100-x) 〖Se〗_x (9≤x≤25 at.%) chalcogenide films have been thermally evaporated onto cleaned glass substrates. The film transmission (T) and reflection (R) spectra have been measured over the wavelength spectral range (0.3-2.5 m). The composition dependence of the optical band gap (Eg) has been illustrated and interpreted in the light of the Mott and Davies Model (MDM). The linear correlation between the changes in the optical band gap (Eg) and in the band tail parameter (∆√B) confirmed the disorder's decrease, which explains the observed increase in Eg values with increasing Se concentrations. The dispersion and Sellmeier parameters have been determined and well discussed. A clear blueshift was observed throughout the observed decrease in values of o and no and the observed shift of the absorption edge to the short wavelengths. The GZS films are transparent in the visible, near- and far-infrared, which makes these glasses suitable for VIS and infrared applications.

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