“…For industrial applications, some doping techniques such as evaporation-condensation, pyrolysis, 14,15 chemical vapour deposition, 16 sputtering 17 or sol-gel methods 18,19 are in use. Very often these processes lead to a strong segregation of dopant atoms at the powder grain surface.…”
Antimony-doped tin oxide powders were prepared using different routes and annealing conditions. The influence of preparation on the distribution of antimony in the powders was studied and correlated with the electrical properties of the powders. A model of doped SnO 2 powder that allows the bulk concentration of the doping element to be calculated from the XPS results is proposed. The doping after crystallization of SnO 2 leads to a very strong surface segregation that is proved by x-ray photoelectron spectroscopy. Antimony is incorporated at the largest concentration in the tin oxide lattice when it is added during the formation of stannic acid. The annealing temperature plays an important role in the antimony distribution. The lower the temperature, the smaller the crystallite size and the lower the incorporation of antimony in the lattice of SnO 2 . A strong correlation between bulk concentration and electrical and morphological properties was found.
“…For industrial applications, some doping techniques such as evaporation-condensation, pyrolysis, 14,15 chemical vapour deposition, 16 sputtering 17 or sol-gel methods 18,19 are in use. Very often these processes lead to a strong segregation of dopant atoms at the powder grain surface.…”
Antimony-doped tin oxide powders were prepared using different routes and annealing conditions. The influence of preparation on the distribution of antimony in the powders was studied and correlated with the electrical properties of the powders. A model of doped SnO 2 powder that allows the bulk concentration of the doping element to be calculated from the XPS results is proposed. The doping after crystallization of SnO 2 leads to a very strong surface segregation that is proved by x-ray photoelectron spectroscopy. Antimony is incorporated at the largest concentration in the tin oxide lattice when it is added during the formation of stannic acid. The annealing temperature plays an important role in the antimony distribution. The lower the temperature, the smaller the crystallite size and the lower the incorporation of antimony in the lattice of SnO 2 . A strong correlation between bulk concentration and electrical and morphological properties was found.
“…Currently, ZnO is widely investigated for potential applications including transparent conductive films [1,2], solar cell [3], sensors [4], optical devices [5], low-voltage varistor [6], and acoustic wave devices [7,8]. In particular, the acoustic wave device application requires ZnO films with a high electromechanical coupling coefficient, temperature stability, high electrical resistivity, and strong c-axis orientation.…”
“…It has exciton and biexciton energies of 60 meV and 15 meV, respectively. Owing to high transparency in the visible region, high electrochemical stability, low cost and non-toxicity, ZnO has been the object of intense interest in recent years for the applications in the electronic and optoelectronic devices, such as window layer and anti-reflecting coating in solar cells, ultrasonic oscillator, infrared reflector and heater, as well as acoustic devices [1][2][3][4]. Further, ZnO can be also used effectively in gas sensors because of its chemical sensitivity to different adsorbed gases [5,6].…”
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