The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Quantum dots have excellent optical properties such as broad excitation spectra, tunable emission spectra, large Stokes shift, quantum-enhanced luminescence efficiency and so on. In this work, CuInS2 quantum dots were prepared successfully by utilizing the non-thermal injection method. They had diameters in the range of 2∼4 nm. The average diameter of the dots was about 2.4 nm. The dominant wavelength...
Cryo-cathodoluminescence was used to investigate defects present in Cu2ZnSnS4 thin films. Four luminescence peaks of energies P1: 0.90 eV, P2: 1.04 eV, P3: 1.18 eV, and P4: 1.29 eV were investigated in detail and a fifth peak at ∼1.6 eV was also noted. Based on a power-series analysis, P1, P2, and P3 are attributed to free-to-bound or donor-acceptor-pair transitions while P4 appears excitonic in nature...
The thermal evaporation technique was used to deposit the zinc (Zn) films on Si(111) substrates. ZnO thin films were obtained in an inexpensive and simple way by thermally oxidizing granulated Zn films at 900°C in air for 1 hour without any catalyst. ZnO thin films have a hexagonal wurtzite structure. The structural and optical characteristics of ZnO thin films samples were investigated by scanning...
This paper presents the procedure of determination of the quantum efficiency of luminescence of Mn2+ ions in the Zn1-x-yBexMnySe crystals. The method is based on the photoacoustic spectroscopy approach. In the paper the experimental spectra of absorbance, transmission, absorption and photoacoustic spectra of the samples are presented and analyzed from the point of view of the possibility of determination...
Under 980 nm LD pumping, the up-conversion intensity of rare earth doped glass-ceramic can be observed much stronger than that in the base glass. In addition, the luminescence branching ratio changed obviously by ceramic process.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.