Search query: chemial bath deposition

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abstract: Abstract Nanostructured CdS thin film was successfully deposited on glass by chemical bath deposition (CBD) at 80 degC. The effect of deposition time on the morphology, composition, optical and optoelectronic properties of nanostructured CdS thin films has been studied. The CBD grown CdS thin films showed random arrangement of interconnected nanoparticles in 2D morphology. Nanostructured CdS thin films exhibited metastable cubic phase having uniform, compact and defect free structure with enhanced crystallinity. Tauc plot of CBD grown nanostructured CdS thin film showed an optimum band gap of 2.30 eV and a resonant Raman peak at 302 cm 1. The transverse optics (TO) mode, multi phonon scattering and high order replicas of nanostructured CdS thin films were also observed. Metal semiconductor metal (MSM) based CdS Photodetector (PD) showed an excellent photodetectivity of 2.6 x 1013 Jones. Photoconductive performance such as photo sensitivity (207% and responsivity (0.38 A/W 420 nm) under an illumination condition was obtained for application in visible light photodetector.
author_names: Manmohansingh Waldiya

R Narasimman

Dharini Bhagat

Dhaval Vankhade

Indrajit Mukhopadhyay
title: Nanoparticulate CdS 2D array by chemical bath deposition: Characterization and optoelectronic study
venue: Materials Chemistry and Physics
year: 2019

abstract: Lead sulfide thin films were prepared at 25 degC temperature using chemical bath deposition (CBD) on both Si (100) and glass substrates. XRD analysis of the PbS film shows that the prepared films have a polycrystalline structure with (200) preferential orientation. The grains become smaller with increasing the deposition concentration. X ray photoelectron spectroscopy (XPS) demonstrated the presence of lead sulfide as PbS. The composition of the prepared films is investigated by energy dispersive X ray spectroscopy technique, and it was found that the films are stoichiometric and have low oxygen contamination. Raman and XPS spectra confirm that the CBD method is a decent one to acquire stoichiometric PbS film with nanostructures. Atomic force microscopy was applied to investigate the change in the films morphology with the concentration. The effect of the concentration, on both optical transmittance in the UV NIR region and the structure of the film, was studied. The results revealed that the optical band gap increased slightly when the concentration increased together with the grain size evolution.
author_names: Bassam Abdallah

Reham Hussein

Nedal Al-Kafri

W Zetoun
title: PbS Thin Films Prepared by Chemical Bath Deposition: Effects of Concentration on the Morphology, Structure and Optical Properties
venue: Iranian Journal of Science and Technology, Transactions A: Science
year: 2019

abstract: Abstract Flower like Ni(OH)2 nanostructured was synthesized by using simple chemical bath deposition (CBD) method as a binder free electrode for supercapacitor. The nanowalls with thickness 50 70 nm were connected to each other forming pores, which further results in higher electrochemical performance by the virtue of easy transportation of electrolyte and ions to active mass. The maximum specific capacitance of flower like Ni(OH)2 is found 1065 F g 1 at current density 15 mA s 1 with excellent rate capability.
author_names: P E Lokhande

Umesh S Chavan
title: Nanoflower like Ni(OH) 2 synthesis with chemical bath deposition method for high performance electrochemical applications
year: 2018

abstract: Abstract Copper antimony sulfide (CAS) has been proposed as low toxicity and earth abundant absorber materials for thin film photovoltaics due to their suitable optical band gap, high absorption coefficient and p type electrical conductivity. The present work reports the formation of copper antimony sulfide by chemical bath deposition using sodium citrate as a complexing agent. We show that by tuning the annealing condition, one can obtain either chalcostibite or tetrahedrite phase. However, the main challenge was co deposition of copper and antimony as ternary sulfides from a single chemical bath due to the distinct chemical behavior of these metals. The as deposited films were subjected to several trials of thermal treatment using different temperatures and time to find the optimized annealing condition. The films were characterized by different techniques including Raman spectroscopy, X ray diffraction (XRD) profilometer, scanning electron microscopy (SEM) UV vis spectrophotometer, and Hall Effect measurements. The results show that the formation of chalcostibite and tetrahedrite phases is highly sensitive to annealing conditions. The electrical properties obtained for the chalcostibite films varied as the annealing temperature increases from 280 to 350 degC: hole concentration (n) 1017 1018 cm 3, resistivity (r) 1.74 2.14 Ocm and carrier mobility (m) 4.7 9.26 cm2/Vseg. While for the tetrahedrite films, the electrical properties were n 5 x 1019 cm 3, m 18.24 cm2/Vseg, and r 5.8 x 10 3 Ocm. A possible mechanism for the formation of ternary copper antimony sulfide has also been proposed.
author_names: F E Loranca-Ramos

C J Diliegros-Godines

Rutilo Silva Gonzalez

Mou Pal
title: Structural, optical and electrical properties of copper antimony sulfide thin films grown by a citrate assisted single chemical bath deposition
year: 2018

abstract: Abstract Lead sulfide nanocrystal films, comprising of well faceted 350 nm cubic nanocrystals are tailored by ion flux controlled chemical bath deposition at 50 degC to 80 degC bath temperatures. These possess compact (111) oriented nanocubic morphology and exhibit significantly improved electrical and opto electronic properties as necessary for emerging next generation solar energy conversion applications. All films are of p type nature and concurrently possess high carrier mobility (u) high hole concentration (p) and low electrical resistivity (r) at room temperature. In particular, for films grown at 75 degC, high values of u 29.3 cm2V 1s 1, p 8.1x1017 cm 3 and r 0.26 O cm are observed on the same nanocubic film. At high temperatures (T 150 K) the charge transport is governed by thermally activated band conduction and nearest neighbour hopping conduction. However, at lower temperatures (T
author_names: Rekha Bai

Sujeet Chaudhary

Dinesh K Pandya
title: Temperature dependent charge transport mechanisms in highly crystalline p PbS cubic nanocrystals grown by chemical bath deposition
year: 2018

abstract: Abstract Growth of highly transparent and hydrophilic ZnS thin films on flexible polymeric and glass substrates has been performed using an environmentally friendly chemical bath deposition method with an ammonia and thioacetamide free reaction solution. Deposition time effect on surface morphology, structure and optical properties of the ZnS thin films has been investigated by field emission scanning electron microscopy (FE SEM) atomic force microscopy (AFM) transmission electron microscopy (TEM) X ray diffractometer (XRD) ultraviolet visible light (UV vis) spectroscopy, and photoluminescence (PL) spectroscopy. Also, the chemical composition of the prepared films has been studied in detail by energy dispersive X ray spectrometer (EDX) X ray photoelectron spectroscopy (XPS) and Raman spectroscopy. TEM images show that the ZnS films consisted of small nanocrystals with diameters =5 nm. Moreover, the water contact angles, 38.5deg and 25.4deg for ZnS films deposited on PS and on glass substrates, respectively, indicate a highly hydrophilic nature. Undoubtedly, the chemical analysis shows the formation of the films with a chemical composition of ZnS0.89, lacking impurities such as ZnO and/or Zn (OH)2. Additionally, FE SEM images show a homogenous deposition over a very large surface area substrates. Ultimately, the obtained photoluminescence spectrum indicates a strong and broad emission peak ranging from 400 to 600 nm, which are due to deep levels or trap state defects in the crystalline structure of the ZnS films.
author_names: Ayat Karimi

Beheshteh Sohrabi

Mohammad Reza Vaezi
title: Highly transparent, flexible and hydrophilic ZnS thin films prepared by a facile and environmentally friendly chemical bath deposition method
year: 2018

abstract: A simple, low temperature route for the chemical bath deposition of Mg doped ZnO films, based on low cost, abundant and non toxic materials was developed. The film growth mechanism, the resulting morphology and texture were investigated in detail by scanning electron microscopy and X ray diffraction measurements. It was found that substantial film growth is only possible in a narrow solution pH window due to the Zn(OH)2 supersaturation as driving force for the film deposition. Different amounts of Mg in the solution cause distinct (0001) (10$ \bar{1} $1 0) or (10$ \bar{1} $1 1) ZnO crystal textures. Speciation modelling helped to understand the solution chemistry and explain the occurrence of different textures by face selective adsorption of Mg species onto specific ZnO faces. The amount of incorporated Mg into the ZnO lattice, determined by inductively coupled plasma atomic emission spectroscopy, was limited to 2.1 mol% Optical band gaps, calculated from transmittance spectra, showed an increase with higher amounts of incorporated Mg and ranged between 3.41 and 3.55 eV.
author_names: Nina Winkler

Stefan Edinger

Wolfgang Kautek

Theodoros Dimopoulos
title: Mg doped ZnO films prepared by chemical bath deposition
venue: Journal of Materials Science
year: 2018

abstract: This study presents a comparison of the piezoelectric properties of nanostructured thin films made of arrays of vertically oriented ZnO nanorods (ZnO NRs) over ITO glass substrate and of ZnO nanowalls (ZnO NWs) over aluminium substrate. Both nanostructures were synthesized on a large area through chemical bath deposition. The morphological, structural, and chemical characteristics of the produced nanostructures were investigated in order to assess the crystal quality and purity. To this purpose, we used different techniques, such as field emission scanning electron microscopy, atomic force microscopy, energy dispersive x ray analysis, powder x ray diffraction, x ray photoelectron spectroscopy, and photoluminescence spectroscopy. Moreover, the piezoelectric response of the nanostructured films was assessed through piezoresponse force microscopy. This technique was employed to obtain a quantitative evaluation of the piezoelectric coefficient <inline formula><tex math notation="LaTeX"{d_{33}/tex math>/inline formula> of the film. We obtained <inline formula><tex math notation="LaTeX"{d_{33}/tex math>/inline formula> values as high as (7.01 0.33) pm/V for ZnO NRs and (2.63 0.49) pm/V for ZnO NWs films.
author_names: Marco Fortunato

Chandrakanth Reddy Chandraiahgari

Giovanni De Bellis

Paolo Ballirano

Peiman Soltani

Saulius Kaciulis

Luisa Caneve

Francesca Sarto

Maria Sabrina Sarto
title: Piezoelectric Thin Films of ZnO Nanorods/Nanowalls Grown by Chemical Bath Deposition
venue: IEEE Transactions on Nanotechnology
year: 2018

abstract: Abstract Cu 2 S and Cu 2 O composite (Cu 2 S@Cu 2 O) film with micro/nano binary structure was created on copper surface using the mixing solution of sodium thiosulphate and copper sulfate by a facile chemical bath deposition method. After modification with low cost polydimethylsioxane (PDMS) the superhydrophobic Cu 2 S@Cu 2 O film was obtained. The as prepared film shows outstanding water repellency with a water contact angle larger than 150deg and long term storage stability. The geometric morphology and chemical composition of the film were characterized by scanning electron microscope (SEM) energy dispersive spectrometer (EDS) and attenuated total reflectance Fourier transform infrared spectroscopy (ATR FTIR) respectively. Moreover, the same method was used to fabricate superhydrophobic/superoleophilic copper mesh, and it could realize separation of various oily sewages with separation efficiency above 94% This strategy has potential to fabricate the practical superhydrophobic Cu 2 S@Cu 2 O film on copper surface on a large scale due to its simplicity and low cost.
author_names: Pihui Pi

Kun Hou

Cailong Zhou

Li Guidong

Xiufang Wen

Shouping Xu

Jiang Cheng

Shuangfeng Wang
title: Superhydrophobic Cu 2 S@Cu 2 O film on copper surface fabricated by a facile chemical bath deposition method and its application in oil water separation
year: 2017

abstract: Abstract Antimony sulfide (Sb 2 S 3 thin films were prepared by laser assisted chemical bath deposition (LACBD) technique. These thin films were deposited on glass substrates from a chemical bath containing antimony chloride, acetone and sodium thiosulfate under various conditions of normal chemical bath deposition (CBD) as well as in situ irradiation of the chemical bath using a continuous laser of 532 nm wavelength. Structure, composition, morphology, optical and electrical properties of the Sb 2 S 3 thin films produced by normal CBD and LACBD were analyzed by X Ray diffraction (XRD) Raman Spectroscopy, Atomic force microscopy (AFM) X Ray photoelectron spectroscopy (XPS) UV vis spectroscopy and Photoconductivity. The results showed that LACBD is an effective synthesis technique to obtain Sb 2 S 3 thin films for optoelectronic applications.
author_names: Sadasivan Shaji

L V Garcia

Shadai Lugo Loredo

Bindu Krishnan

J A Aguilar Martinez

Tushar Kanti Das Roy

David Avellaneda Avellaneda
title: Antimony sulfide thin films prepared by laser assisted chemical bath deposition
year: 2017