Optical Characterization of CdSe1 – xTex Nanocrystals Grown in Borosilicate Glass

Azhniuk, Y. M.; Gomonnai, A. V.; Hutych, Yu. I.; Lopushansky, V. V.; Zahn, D. R. T.

doi:10.21272/jnep.14(4).04017

Cited by 2 publications

(2 citation statements)

References 27 publications

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“…It shows that CdSe nanocrystals have been grown in glass at the end of 46 days and 75 days. Here, temperature has been lowered, and time interval has been seriously prolonged to produce CdSe nanocrystals in glass differently from those of the studies in literature [6][7][8]. A shoulder has been seen at that of as received.…”

Section: Resultsmentioning

confidence: 95%

“…In this paper, CdSe nanocrystals have been nucleated and grown in glass by melting, rapid cooling, and heat treatment procedure. Lower temperature and prolonged time at heat treatment stage when compared with the studies in literature have been used to produce small and pure CdSe nanocrystals in borosilicate glass [6][7][8]. Composition of CdSe nanocrystals has been determined by Raman spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

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Slow Growth of CdSe Nanocrystals in Glass and Their Refractive Index Change

Allahverdi

2023

ijmph

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Slow growth of CdSe nanocrystals in glass and their refractive index changeAbstract. The refractive index change of semiconductor nanocrystals must be known when designing precision optical components based on semiconductor nanocrystals. In this study, Kramers-Kronig transformation has been used to compute the linear refractive index change of cadmium selenide (CdSe) nanocrystals embedded in glass. Classical theory and numerical computation of Kramers-Kronig relation have been given and explained in detail. CdSe nanocrystals have been grown in borosilicate glass by using melting, rapid-cooling, and heat treatment procedure. Compared to the production studies of semiconductor nanocrystals in borosilicate glass in the literature, the growth temperature of CdSe nanocrystals in glass has been decreased and their growth time has been extended. In other words, a slow growth method has been performed to form pure CdSe nanocrystals in glass. The quantum size effect has been observed at their optical absorption spectra. Surface and longitudinal optical phonon modes of CdSe nanocrystals have been measured by using Raman spectroscopy. The refractive index change has been found as ~1.36×10 -4 for CdSe nanocrystals with a diameter of ~3.93 nm.

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Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Slow Growth of CdSe Nanocrystals in Glass and Their Refractive Index Change

Allahverdi

2023

ijmph

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Visible Light Photodetectors Based on Hydrothermally Synthesized Cd-Se-Te Nanostructures

Das,

Tripathi,

Parida

et al. 2024

ACS Appl. Electron. Mater.

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Metal chalcogenides are currently in the limelight for various optoelectronic sectors. Cd-Se-Te nanomaterials are hydrothermally synthesized by varying Se and Te while keeping the Cd content constant. A structural study provides information on the formation of hexagonal CdSe and cubic CdTe phases. The material crystallinity increased with an increase in the Te content. Raman spectroscopy showed the presence of various Cd-Te and Cd-Se modes present in the material. The morphology of the material changes from a cylindrical to a spherical shape. The optical study illustrates the reduction in the bandgap and red shift in the absorption edge. The refractive index of the material behaves exactly opposite of the optical bandgap. The X-ray photoelectron spectra provided the +2-oxidation state of Cd and the −2 oxidation state of both Se and Te. A photoluminescence (PL) study provides the defect states present in the material and shows a red shift in the PL peak, which is the same as the absorption edge. A current–voltage study of the material shows the increased pattern in the photocurrent with an increment in the Te concentration. The photoresponse study was done by the illumination of white light, which results in good responsivity and detectivity. All of these results show the material is suitable for visible light photodetector applications.

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Optical Characterization of CdSe1 – xTex Nanocrystals Grown in Borosilicate Glass

Cited by 2 publications

References 27 publications

Slow Growth of CdSe Nanocrystals in Glass and Their Refractive Index Change

Slow Growth of CdSe Nanocrystals in Glass and Their Refractive Index Change

Visible Light Photodetectors Based on Hydrothermally Synthesized Cd-Se-Te Nanostructures

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