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[en] The Cadmium Zinc Sulphide (Cd1-xZnxS) is potential alloy for researchers to enhance the performance of (Cd, Zn) S/Cu(In, Ga)Se2 solar cell in terms of efficiency up to 16.9%. The RF sputtering technique of preparing CdZnS films is being reported by us. A 300 nm thick film of CdZnS at 6x10-3 torr pressure was prepared while maintaining a constant power supply of 80 w. We studied the effect of temperature on deposition process. For each deposition, a constant separation of 6.5 cm was maintained between source and target. The optical and structural properties of CdZnS films were investigated at various temperatures ranging from room temperature to 500 °C increasing at step size of 100°C. (author)
[en] In this study, cadmium sulfide (CdS)-sensitized solar cells have been fabricated, where nanoporous titanium oxide (TiO2) photoelectrode of equal thickness has been prepared on SnO2:F coated glass substrate using TiO2 paste. Different amounts of CdS have been deposited by an ammonia-free chemical bath deposition technique with various deposition times. The CdS-sensitized TiO2 photoelectrodes show polycrystalline nature. The optical measurement reveals that absorbance edge of the CdS-sensitized TiO2 photoelectrode extends up to 540 nm and the amount of absorbance increases with the enhancement of CdS-deposition time. The CdS solar cell, with deposition time of 12 min, shows impressive photocurrent and moderate solar cell efficiency.
[en] Photoluminescence measurements are carried out on a cadmium sulfide (CdS) single crystal grown by using a sublimation method in the temperature range from 20 to 293 K. The peak energies of the free exciton, Ex(A) and Ex(B), are observed at 2.5511 eV and 2.5705 eV, respectively. We find that the temperature dependences of the positions, the intensities, and the linewidths of the exciton peaks fit an empirical equation proposed by Toyozawa, The crystal field of the CdS crystal is observed, and the energy of split gap, Δcr, is 19.6 meV. The temperature dependence, Eg(T), of the energy band gap of CdS is also discussed
[en] An experimental study of several physical properties of polycrystalline cadmium sulphide (CdS) samples obtained by ceramic technology is reported. It has been investigated the influence of pressure in samples preparation, sintering temperature and atmosphere on the structural and electrical properties. (author)
[en] This patent describes a photoelectric cell. It comprises a thin film of CdZnS that forms a continuous coating free of pin holes and has a thickness that is sufficiently thin to provide at least 70% transmission of radiation having a wavelength 400 nm
[en] Luminescence kinetics of non-thermalized electron-hole plasma in highly excited CdS microcrystals embedded in glass was studied at T = 295 K using two pump pulses technique. The observed carrier kinetics shows additional increase in the effective temperature during the pump pulse as a result of the prepump pulse. The increase is shown to be produced by the fusion of long-lived second-generation nonequilibrium phonons generated by the prepump pulse. The experimental results are in good agreement with the model of hot electron-hole plasma energy relaxation with a build-up of two generations of nonequilibrium phonons. (author)
[en] Full text: Luminescence compositions on the basis polyethylene (PE) and polyethylene (PP) with different contents of binary compounds based on cadmium sulfide and of zine sulfide (CdS and ZnS). Compositions as films have been obtained with thickness of about 100 mkm by mixing of powders of polymer and sulfides with the subsequent pressing at temperature of melting of a polymeric matrix. Molecular mobility of a polymeric matrix of luminescence compositions is investigated by a method of radio thermo luminescence (RTL). RTL spectra have been obtained in visible oblast on thermo luminograph of TLG-69M (on base of PhM51) at heating rate ∼ 10 degree/minute. Excitation was carried out at 77K from a source 60Co at a doze 104Gy. Comparison of RTL spectrums of unfilled polymer and compositions with various contents of filler is lead. It is established, that RTL spectrums of composites on basis of PE have four maxima at temperature ranges of 146†155K; 172†178K; 238†250K; 293†308K, two peaks of which concern to a polymeric matrix (146†155K; 172†178K). RTL spectrums of composites on the basis of PP have a maximum at temperature ranges of 160?170K; 242?250K; 301?305K, one of which concerns to a polymeric matrix (160†170K). The maxima relating to polymeric matrix characterizes molecular mobility in area of β relaxation of small kinetic segments (on Boer) and second maximum of β relaxation of larger segments of macromolecules of polymer. Presence of luminophore on the basis of double sulfides with an impurity of atoms of silver results on the one hands in more clear split of β relaxation (β' and β) and on the other hand filler has own luminescence. At studying of RTL spectrums the shift of temperature displacing in to high temperatures with increase of filler content was observed. The amplitude of a luminescence has extreme character and at 10% vol. content of filler in a polymeric matrix gets maximal values.It is shown, that introduction of luminescence filler strongly influences on molecular mobility of polymeric matrix and as a result the density of energy levels in interphone boundary of polymer-luminescent particle changes and this in turn influences on luminescence properties of compositions on their basis. A polyolefin's with binary compounds allows identify complex character of molecular mobility in these systems.
[en] We study the possibility of preparing thin CdS films on conductive glasses by high temperature molten salt electrocrystallization. The CdS films have been electrodeposited on ZnO or ITO coated glass substrates in solution of CdCl2 and Na2SO3 in fused LiCl-KCl eutectic. They consist only of hexagonal phase α-CdS irrespective of the crystal structure of the substrates (hexagonal for ZnO and cubic for ITO). CdS films deposited on ZnO coated glass consist of single platelets oriented with the (0001) face parallel to the substrate. They are yellow in colour and show good adhesion to the substrates at higher current density (>0.4 mA cm-2) and long deposition time (>30 min). The films of CdS deposited on ITO/glass are more dense under identical conditions which is explained by the lower resistivity of the ITO layers in comparison with ZnO layers. (author)