Open AccessВлияние структурно-морфологических характеристик на сенсорные свойства пленок Cd-=SUB=-x-=/SUB=-Pb-=SUB=-1-x-=/SUB=-S
Author(s) -
Л. Н. Маскаева,
I. V. Vaganova,
Вячеслав Филиппович Марков,
A. E. Bezdetnova,
А. Д. Селянина,
В. И. Воронин,
И.О. Селянин
Publication year - 2021
Publication title -
fizika i tehnika poluprovodnikov
Language(s) - English
Resource type - Journals
eISSN - 1726-7315
pISSN - 0015-3222
DOI - 10.21883/ftp.2021.12.51704.9726
Subject(s) - crystallite , cadmium , thin film , photocurrent , materials science , analytical chemistry (journal) , crystal structure , supersaturation , cadmium acetate , lattice constant , crystallography , chemistry , diffraction , nanotechnology , optics , metallurgy , chromatography , physics , optoelectronics , organic chemistry
Polycrystalline films of CdxPb1−x S(0.021 ≤ x ≤ 0.090) supersaturated substitutional solid solutionswith a cubic structure B1 (Fm3¯m space group) have been obtainedwith varying cadmium acetate salt Cd(CH3COO)2 in the reactionmixture within 0.01−0.1 mol/l on the sitall substrates. Theirthickness changed from ∼ 0.4 to ∼ 1.0 microns. A correlationhas been established between the structural-morphological andfunctional properties of CdxPb1−x S thin-film layers. The extremecharacter of the voltage sensitivity dependence on the cadmiumsalt concentration in the reaction bath is associated with thenonmonotonic introduction of cadmium into the PbS crystallattice. It is shown that the maximum photocurrent is possessedby CdxPb1−x S thin-film layers formed from crystallites withpronounced faceting. We have found the surface sensitivity ofthe CdxPb1−xS films to the presence of ∼ 0.02 mg/m3 NO2 inthe air, which is significantly lower than the maximum allowableconcentration.