Abstract
It is shown that in the potential energy of an exciton of spatially separated electrons and holes (hole moves in the amount of quantum dots (QDs), and the electron is localized on a spherical surface section (QD—dielectric matrix)) taking into account centrifugal energy gives rise band of the quasi-stationary surface exciton states that with the increase of the radius of QD becomes stationary state. The mechanisms of formation of the spectra of interband and intraband absorption (emission) of light in nanosystems containing aluminum oxide QDs, placed in the matrix of vacuum oil, are presented. It is shown that the electron transitions in the area of the surface exciton states cause significant absorption in the visible and near infrared wavelengths, and cause the experimentally observed significant blurring of the absorption edge.
Highlights
Investigation of quasi-zero nanosystems consisting of semiconductor spherical form quantum dots (QDs) with the radii a = 1–10 nm, containing cadmium sulfide (CdS), ZnSe and aluminum oxide in their volume, which were grown in the transparent dielectric matrix, such as borosilicate glass, vacuum and immersion oils, has received increased attention due to their unique photoluminescent properties and the ability of the efficiently emitting light in the visible or near infrared regions at room temperature [1,2,3,4]
It is established that the light spectrum of the interband absorption of nanosystems consisting of the energy bands which are formed by the electron between quasi-stationary and stationary states, and intraband absorption spectra—from the bands caused by electron transitions between stationary states
In the nanosystem the stationary states of the exciton are located in the bandgap of aluminum oxide QD
Summary
Investigation of quasi-zero nanosystems consisting of semiconductor (dielectric) spherical form quantum dots (QDs) with the radii a = 1–10 nm, containing CdS, ZnSe and aluminum oxide in their volume, which were grown in the transparent dielectric matrix, such as borosilicate glass, vacuum and immersion oils, has received increased attention due to their unique photoluminescent properties and the ability of the efficiently emitting light in the visible or near infrared regions at room temperature [1,2,3,4]. It is established that the light spectrum of the interband absorption (emission) of nanosystems consisting of the energy bands which are formed by the electron between quasi-stationary and stationary states, and intraband absorption spectra—from the bands caused by electron transitions between stationary states
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
