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The work aims at enhancing the photoelectrochemical performance of photoelectrode from two aspects: The TiO2 NTWs is manufactured by anodic oxidation method and then annealed in hydrogen atmosphere. The as-prepared materials are sensitized with PbS and CdS quantum dots via successive ion layer absorption method (SILAR) method. The as-prepared materials are characterized by scanning electron microscope(FESEM),...
Controlled localized doping of selective emitter structures via Innovalight Silicon Ink technology is demonstrated. Both secondary ion mass spectrometry and scanning capacitance microscopy reveal abrupt lateral dopant profiles at ink-printed boundaries. Uniform doping of iso- and pyramidal surfaces is also verified using scanning electron microscopy dopant contrast imaging.
Ingots containing monocrystals of CuInSe2 have been fabricated, using a Bridgman-growth procedure, in quartz ampoules, to which varying concentrations of sodium and excess selenium have been added. The CuInSe2 ingots were nominally p-type, but could be made n-type by adding sufficient sodium to the melts before growth. Small additions of excess Se required that greater additions of Na be introduced...
Poly ethylene terephthalate (PET) is a favorite polymer for applications in flexible electronics such as flexible displays and solar cells. Also it has extensive applications in food and packaging industries. A considerable decrease in permeability of polyethylene terephthalate (PET) films by means of surface plasma treatment in a reactive ion etching system is reported. The effects of hydrogen, oxygen...
ZnTe is a candidate low-cost II-VI absorber material of wide band gap (EG = 2.24 eV) with potential of enhanced open circuit voltage and application for tandem cells. Fundamental chemical and electronic properties related to the processing of ZnTe-based devices are demonstrated. We used x-ray diffraction, scanning electron microscopy and photoemission spectroscopy to analyze film structure, morphology,...
The effect of the pulsed - laser annealing on the parameters of CdS thin layers in the medium of oxygen was studied. The CdS thin layers were deposited by spray pyrolysis and surface treatment by nanosecond pulses of XeCl - laser. The changes in the layers were characterized by SEM, XRD and XPS. The results showed that a change in the morphology of the surface occurred; a by-surface layer consisted...
Improvement of dye sensitized solar cell was investigated using methyl-violet dye and nanocrystalline ZnO thin film electrodes. A low cost fabrication method and low cost materials were used to prepare this photocell. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize the microstructure and surface properties of dye coated ZnO electrodes. According to the...
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