Effect of deposition temperature on the structural, morphological and optical band gap of lead selenide thin films synthesized by chemical bath deposition method

2016 ◽  
Vol 183 ◽  
pp. 320-325 ◽  
Author(s):  
Fekadu Gashaw Hone ◽  
Francis Kofi Ampong
Keyword(s):  
Thin Films ◽  
Band Gap ◽  
Chemical Bath Deposition ◽  
Deposition Temperature ◽  
Optical Band Gap ◽  
Lead Selenide ◽  
Chemical Bath Deposition Method ◽  
Deposition Method

scholarly journals Unusual Blueshifting of Optical Band Gap of CdS Nanocrystals through a Chemical Bath Deposition Method

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Shu Qing Yuan ◽  
Peng Fei Ji ◽  
Yong Li ◽  
Yue Li Song ◽  
Feng Qun Zhou
Keyword(s):  
Band Gap ◽  
Chemical Bath Deposition ◽  
Optical Band Gap ◽  
Quantum Effect ◽  
Wide Band ◽  
Chemical Bath Deposition Method ◽  
Band Gaps ◽  
Deposition Method ◽  
Defect States ◽  
Cds Nanocrystals

CdS nanocrystals are synthesized through a chemical bath deposition method. After annealing, these nanocrystals are enlarged according to Scherrer’s formula. Small nanocrystals display wide band gaps as a result of the quantum effect experienced by nanocrystals of a certain size. However, the absorption edge and green and red emissions of annealed CdS nanocrystals show obvious blueshift compared with the as-grown ones. After annealing, the intensity ratio of these green and red emissions increases, which indicated that the defect states are reduced. Therefore, the improvement in crystalline quality and the reduced strain contribute to the unusual blueshifting of the optical band gap and of the green and red emissions.

Optical properties of nanocrystalline ZnS:Mn thin films prepared by chemical bath deposition method

2012 ◽  
Vol 24 (1) ◽  
pp. 260-266 ◽  
Author(s):  
R. Sahraei ◽  
A. Daneshfar ◽  
A. Goudarzi ◽  
S. Abbasi ◽  
M. H. Majles Ara ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Chemical Bath Deposition ◽  
Chemical Bath Deposition Method ◽  
Deposition Method

Absorber Films of Ag2S and AgBiS2 prepared by Chemical Bath Deposition

2002 ◽  
Vol 730 ◽  
Author(s):  
A. Nuñez Rodriguez ◽  
M.T.S. Nair ◽  
P.K. Nair
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electrical Conductivity ◽  
Silver Nitrate ◽  
Band Gap ◽  
Chemical Bath Deposition ◽  
Optical Band Gap ◽  
Sodium Thiosulfate ◽  
Xrd Pattern ◽  
Glass Substrates

AbstractAg2S thin films of 90 nm to 300 nm in thickness were deposited at 70°C on glass substrates immersed in a bath mixture containing silver nitrate, sodium thiosulfate and dimethylthiourea. When the films are heated in nitrogen at temperatures 200°C to 400°C, crystallinity is improved and XRD pattern similar to that of acanthite is observed. These films possess electrical conductivity of 10-3 (ohm cm)-1, are photoconductive and exhibit an optical band gap of 1.36 eV. When Ag2S thin film is deposited over a thin film of Bi2S3, also obtained by chemical bath deposition from bismuth nitrate, triethanolamine and thioacetamide, and heated at 300°C to 400°C in nitrogen, a ternary compound, AgBiS2 is formed. This material has an electrical conductivity of 5x10-5 (ohm cm)-1, is photoconductive and possesses optical band gap 0.95 eV.

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