Low resistivity cubic phase CdS films by chemical bath deposition technique

Melo, O. de; Hernández, Leonardo; Zelaya-Ángel, O.; Lozada‐Morales, R.; Becerril, M.; Vasco, E.

doi:10.1063/1.112094

Cited by 98 publications

(38 citation statements)

References 8 publications

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“…However, solution based techniques are more economical and efficient for large scale production of nano film based photodetectors. 5 Chemical bath deposition (CBD) [6][7][8][9][10][11][12][13][14][15][16][17] is the most commonly used technique to make CdS thin films and have been studied heavily for their photodynamics, electro-optical studies and also known low cost material for photodetector applications. One of the big advantages of CBD method is that film can be made over a large area (mm 2 ).…”

Section: Introductionmentioning

confidence: 99%

Channel length specific broadspectral photosensitivity of robust chemically grown CdS photodetector

et al. 2015

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CdS grown by chemical bath deposition (CBD) technique is very simple, robust, economical method and has potential large scale applications in solar cells, photovoltaic, photodetectors, sensors and optoelectronic devices. Here we report channel lengths (CLs) specific broadspectral photoresponse properties of commonly grown robust CdS films by CBD. The broadspectral dependent current flow has been observed in all CLs and the rise and decay times have been measured in milliseconds for visible wavelengths (400-700nm). The rise time curves showed linear dependency when measured for CLs 300, 500 and 700nm and non-linearity was observed for CLs 7μm, 45μm and 350μm. We have noticed that decrease in channel lengths down to nanometers (300 nm) increases the response time. Three steps decay time has been noticed for all CLs. The shorter channels (nm) showed two trends in decay time, small increase for wavelengths <550nm and significant increase for wavelengths >550nm. Finally, CLs specific broadspectral photosensitivity has been investigated which indicates the device geometry and fabrication method play an important role for defining the CdS based photodetectors or simulating the characteristics of a photodetector.

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Section: Introductionmentioning

confidence: 99%

Channel length specific broadspectral photosensitivity of robust chemically grown CdS photodetector

et al. 2015

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“…The enhancement of σ(RT ) is about one order of magnitude for the highest fraction of PPY. The conductivity of pure PPY is 6.67 × 10 −2 S-cm −1 and the conductivity of nanosized CdS at room temperature is of the order of 10 −9 S-cm −1 [39,40]. Much higher room temperature conductivity of the nanocomposites indicates that electrical conduction is dominated by the PPY.…”

Section: Resultsmentioning

confidence: 82%

CdS Nanoparticles: Glucose/Starch Synthesis Method and Non Linear Electrical Properties Disperse in Polypyrrole Matrix

Dutta¹

2018

e-J. Surf. Sci. Nanotech.

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Development of environmentally benign methods for the synthesis of nanoparticles is an evolving important branch of nanotechnology. Inorganic-organic hybrid nanocomposites are synthesized by dispersing nanosized CdS in the conducting polypyrrole (PPY) matrix. The samples are characterized by X-ray diffraction, transmission and scanning electron microscopes and UV-VIS spectrophotometer. The wavelength of optical absorption peak of CdS nanoparticle increases from 430 nm to 470 nm with the decrease of polypyrrole concentration. Studies on dc electrical conductivity as a function of temperature suggest that three dimensional Mott's hopping process occurs in CdS-Polypyrrole nanocomposites. The incorporation of CdS nanoparticles enhances the barrier height. The barrier height increases with the content of CdS. The observed nonlinear current-voltage characteristics are satisfactorily explained using the Schottky type barriers.

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“…ITO glass (15D./Samsung Coming Korea) was ultrasonically cleaned with 2% Microsoap in water for 30 minutes, after H2SO4+HNO3 treatment [14]. CdTe/CdS/ITO substrates were cut into lxlcm ~ plates.…”

Section: E X P E R I M E N T a Lmentioning

confidence: 99%

Electrochemical synthesis of cu-doped znte films as back contacts to cdte solar cells

Jun

Kim

1999

Metals and Materials

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Electrochemical deposition of Cu-doped ZnTe films was investigated as a back contact material for CdTe solar cells. The deposition system consisted of a potentiostat, a substrate (cathode), a Pt counter electrode, and an Ag/AgCI reference electrode. Experimental conditions were: pH=2.5---4, deposition temperature=70 -80~ electrolyte concentration=0.02 M Zn 2, 10 ~ M TeO2, and deposition potential (V~) = -0.85 --1.0 V vs. Ag/AgC1. A cyclic voltammogram obtained from an ITO substrate showed a ZnTe reduction peak at V~ = -0.7 --0.9 V. A film obtained at pH=2.5, V,=-0.975 V showed the strongest ZnTe X-ray diffraction peak, but its surface morphology was not as smooth as the films made under the condition of pH=3--4, V,:-0.950V. Triethanolamine did not form a complex with Cu-" in acidic solution as needed for uniform Cu-doping, but oxalate anion and 1,10-phenanthroline did at pH=2-3. The efficiency of CdTe solar cells increased from 3.4% to 7.1% when Cu-doped ZnTe film was used as the back contact.

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Low resistivity cubic phase CdS films by chemical bath deposition technique

Cited by 98 publications

References 8 publications

Channel length specific broadspectral photosensitivity of robust chemically grown CdS photodetector

Channel length specific broadspectral photosensitivity of robust chemically grown CdS photodetector

CdS Nanoparticles: Glucose/Starch Synthesis Method and Non Linear Electrical Properties Disperse in Polypyrrole Matrix

Electrochemical synthesis of cu-doped znte films as back contacts to cdte solar cells

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