Effect of Ag doping on structural, optical and electrical properties of antimony sulfide thin films
Por:
Diliegros-Godines C.J., Santos Cruz J., Mathews N.R., Pal M.
Publicada:
1 ago 2018
Ahead of Print:
1 ene 2018
Resumen:
This work reveals the effect of silver doping on structural, optical and
electrical properties of Sb2S3 films grown by a citrate-mediated
chemical bath deposition technique. The silver content in solution was
7.5 mol% with respect to Sb3+ ions. The films were deposited in a cold
bath for four hours and subjected to thermal treatment in a N-2
atmosphere at 300 A degrees C for 1 h. Polycrystalline nature of Sb2S3
films with orthorhombic phase was confirmed in both undoped and Ag-doped
samples by X-ray diffraction technique and Raman spectroscopy. Scanning
electron microscopy imaging showed the presence of irregular-shaped
interconnected particulate grains in the undoped films, while nearly
spherical clusters of smaller grain size were observed for Ag-doped
Sb2S3 films. X-ray photoelectron spectroscopy results revealed the
incorporation of metallic Ag into the Sb2S3 lattice. A detailed growth
mechanism has been proposed for the formation of Sb2S3 and incorporation
of metallic silver in the host matrix. The optical properties were
recorded by UV-Vis diffuse reflectance spectroscopy. The inclusion of Ag
in Sb2S3 films causes a red shift in band gap values from 1.75 to 1.66
eV. The dark resistivity of Sb2S3 films was decreased by one order on
silver doping.
Filiaciones:
Diliegros-Godines C.J.:
Instituto de Física, BUAP, Av. San Claudio y Blvd. 18 Sur Col. San Manuel, Ciudad Universitaria, Puebla, Mexico
Santos Cruz J.:
Facultad de Química, Materiales-Energía, Universidad Autónoma de Querétaro, Santiago de Querétaro, Qro, Mexico
Mathews N.R.:
Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Temixco, Morelos, Mexico
Pal M.:
Instituto de Física, BUAP, Av. San Claudio y Blvd. 18 Sur Col. San Manuel, Ciudad Universitaria, Puebla, Mexico
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