Characterization of Nanostructured Heterojunction Solar Cells of CdS/Cd2x(CuIn)1-xS2 Grown by Chemical Spray Pyrolysis

2014 ◽  
Vol 925 ◽  
pp. 585-589 ◽  
Author(s):  
Hamid S. Al-Jumaili ◽  
Mohammed Z. Al-Rawi ◽  
Yarub Al-Douri
Keyword(s):  
Spray Pyrolysis ◽  
Film Surface ◽  
Chemical Spray Pyrolysis ◽  
X Ray Diffraction ◽  
Heterojunction Solar Cells ◽  
Optical Absorbance ◽  
Ito Glass ◽  
Chemical Spray ◽  
P Type ◽  
Conversion Efficiencies

A nanostructured heterojunction of CdS/Cd2x(CuIn)1-xS2 with x=0.2 was prepared by chemical spray pyrolysis on ITO/glass substrate at 350 °C. The X-ray diffraction pattern obtained from CdS/Cd2x(CuIn)1-xS2 solar cell confirmed the formation of Cd2x(CuIn)1-xS2 (CCIS), CuInS2, In2S3, and CdS phases, with crystallite size of 16 nm for CCIS and 26 nm for CdS films. The morphology of the film surface was obtained by AFM technique, which produced a greater grain size of 58.3 nm for CdS and 80 nm for CCIS surfaces. Optical absorbance analysis confirmed the composition-controlled electronic transition in the thin film, and the energy band gap was observed to red shift with the increase in the value of x. The electrical properties produced a P-type conductivity of CCIS with two activation energies. I–V characteristic in dark condition produced unsymmetrical heterojunctions, whereas abrupt-type heterojunctions were produced from the C–V curve. The solar energy conversion efficiencies achieved upon illumination of 100 mW/cm2 were 0.35%, 0.5%, 0.9%, and 1.28% for CCIS thicknesses of 610, 800, 910, and 1000 nm, respectively.

Deposition of p-type NiO films by chemical spray pyrolysis

Vacuum ◽  
2014 ◽  
Vol 107 ◽  
pp. 242-246 ◽  
Author(s):  
M. Krunks ◽  
J. Soon ◽  
T. Unt ◽  
A. Mere ◽  
V. Mikli
Keyword(s):  
Spray Pyrolysis ◽  
Chemical Spray Pyrolysis ◽  
Chemical Spray ◽  
P Type ◽  
Nio Films

scholarly journals Influence of Nd and Ce doping on the structural, optical and electrical properties of V2O5 thin films

2019 ◽  
Vol 14 (30) ◽  
pp. 73-82
Author(s):  
I. K. Jassim
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis Technique ◽  
Chemical Spray Pyrolysis ◽  
X Ray Diffraction ◽  
Transition Band ◽  
X Ray ◽  
Chemical Spray ◽  
V2o5 Thin Films ◽  
P Type ◽  
Nano Grains

Nano-structural of vanadium pentoxide (V2O5) thin films weredeposited by chemical spray pyrolysis technique (CSPT). Nd and Cedoped vanadium oxide films were prepared, adding Neodymiumchloride (NdCl3) and ceric sulfate (Ce(SO4)2) of 3% in separatesolution. These precursor solutions were used to deposit un-dopedV2O5 and doped with Nd and Ce films on the p-type Si (111) andglass substrate at 250°C. The structural, optical and electricalproperties were investigated. The X-ray diffraction study revealed apolycrystalline nature of the orthorhombic structure with thepreferred orientation of (010) with nano-grains. Atomic forcemicroscopy (AFM) was used to characterize the morphology of thefilms. Un-doped V2O5 and doped with 3% concentration of Nd andCe films have direct allowed transition band gap. The mechanisms ofdc-conductivity of un-doped V2O5 and doped with Nd and Ce filmsat the range 303 K to 473 K have been discussed.

Morphological and Structural Study of Nanostructured Tin Dioxide (SnO2) Thin Films by Spray Pyrolysis

2012 ◽  
Vol 626 ◽  
pp. 672-676
Author(s):  
Boon Hoong Ong ◽  
Heng Choy Lee ◽  
Sharifah Bee Abdul Hamid
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Substrate Temperature ◽  
Spray Pyrolysis ◽  
Tin Dioxide ◽  
Spray Pyrolysis Technique ◽  
Chemical Spray Pyrolysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Chemical Spray

Nanostructured SnO2 thin films were deposited on glass substrate using chemical spray pyrolysis technique. Three influent synthesis parameters, namely (i) the precursor concentration (0.2M and 0.5M), (ii) the substrate temperature (250°C and 350°C) and (iii) doping with zinc (Zn) were investigated in term of their effects on the morphology and structure of SnO2 thin films. These films were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and energy dispersive X-ray spectrometry (EDX) techniques. The grain size of the films was observed to increase as the concentration of the precursors is increased. Substrate temperature is proved to be crucial in determining the crystallinity of the films as the films are reported to grow at temperature above 270°C. Besides, the addition of dopant was found to reduce the grain size of the film.

Chemical Spray Pyrolysis of Complex Thin Solid Films

1992 ◽  
Vol 282 ◽  
Author(s):  
Clayton W. Bates ◽  
Elizabeth B. Varner ◽  
Svetlana Alshvang ◽  
Keith Summers
Keyword(s):  
Spray Pyrolysis ◽  
Film Formation ◽  
Low Cost ◽  
Solution Chemistry ◽  
Chemical Spray Pyrolysis ◽  
Thin Solid Films ◽  
Solid Films ◽  
Chemical Spray ◽  
P Type ◽  
Substrate Temperatures

ABSTRACTChemical spray pyrolysis (CSP) is a technique in which compounds of the constituents of the thin film to be fabricated are dissolved in an aqueous solution which is subsequently sprayed onto a heated substrate using nitrogen as the atomizing gas. At relatively low substrate temperatures (150–400°C) chemical reactions take place in which film formation of the desired compound occurs concomitantly with the release of volatile chemical reactants. The technique has advantages that include: (1) simplicity, (2) low cost and simple equipment, (3) the ability to prepare films over large areas with various shapes with relative ease and (4) the possibility of varying the physical properties through chemical means in known ways at modest temperatures. Results on the preparation of CuInSe2 which is a defect dominated semiconductor of technological interest are presented. Both n- and p- type materials were prepared with resistivities varying from 10−2 – 104 ohm-cm illustrating the use of the control of solution chemistry to produce films with reproducibly controlled properties.

Chemical Spray Pyrolysis Path to Synthesis of ZnO Microsausages from Aggregation of Elongated Double Tipped Nanoparticles

2012 ◽  
Vol 706-709 ◽  
pp. 2577-2582 ◽  
Author(s):  
Cosmas Muiva ◽  
Stephen T. Sathiaraj ◽  
Kelebogile Maabong
Keyword(s):  
Electron Microscope ◽  
Spray Pyrolysis ◽  
Chemical Spray Pyrolysis ◽  
X Ray Diffraction ◽  
Absorption Mechanism ◽  
X Ray ◽  
Glass Substrates ◽  
Chemical Spray ◽  
Regular Patterns ◽  
Scanning Electron

The versatile chemical spray pyrolysis was used to prepare elongated double tipped ZnO nanoparticles and microsausages on glass substrates. X-ray diffraction studies revealed several crystallographic plane orientations with the most predominant along the (002) direction. Scanning electron microscope (SEM) observations indicated double tipped nanoparticles with an aspect ratio of 4.5-8.6 which coalesced in regular patterns to form microsized sausages of width ranging up to 1.2 µm. The absorption mechanism was through direct transitions with an absorption edge corresponding to a band gap of 3.18 eV.

Characterization of Metal Oxide Sensor Thin Films Deposited by Spray Pyrolysis

2013 ◽  
Author(s):  
S. M. Navid Khatami ◽  
D. Nadun Kuruppumullage ◽  
Olusegun J. Ilegbusi
Keyword(s):  
Spray Pyrolysis ◽  
Chemical Spray Pyrolysis ◽  
X Ray Diffraction ◽  
Sensor Applications ◽  
Tin Chloride ◽  
Chemical Spray ◽  
Higher Temperature ◽  
Metal Oxide Sensor ◽  
Deposited Film

Chemical Spray Pyrolysis (CSP) of ZnO and SnO2 is of interest for gas sensor applications. The structural properties of the deposited film can be strongly influenced by deposition conditions. In this work, two solutions consisting of Tin Chloride and Zinc Chloride was sprayed on a heated substrate, where temperature was varied from 400° C to 450° C for ZnO, and from 350° C to 500° C for SnO2. X-ray diffraction and scanning electron microscopy, indicating a non-homogenous-structured film formed at low temperature for both oxides. At 450° C, a porous structure is observed for SnO2. This structure becomes homogenous at higher temperature. It was also found that at temperatures lower than 450° C, substrate temperature has significant impact on the composition of the synthesized films.

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