Chemical bath deposition and characterization of CdSe thin films for optoelectronic applications

Gopakumar, N.; Anjana, Prabhakaran Sreekumari; Pillai, Prasanth A.

doi:10.1007/s10853-010-4756-1

Cited by 59 publications

(21 citation statements)

References 11 publications

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“…Mostly CdSe thin films were prepared using physical and chemical methods such as thermal evaporation [11,12], sputtering [13], electron beam evaporation [9,14], chemical bath deposition [15][16][17][18][19], spray pyrolysis [8,20], electrodeposition [21,22], photoelectrochemical [23,24], SILAR [25] and photochemical deposition [26].…”

Section: Introductionmentioning

confidence: 99%

Solvothermal synthesis, deposition and characterization of cadmium selenide (CdSe) thin films by thermal evaporation technique

Shyju

Anandhi

Indirajith

2011

Journal of Crystal Growth

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Section: Introductionmentioning

confidence: 99%

Solvothermal synthesis, deposition and characterization of cadmium selenide (CdSe) thin films by thermal evaporation technique

Shyju

Anandhi

Indirajith

2011

Journal of Crystal Growth

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“…CdSe thin films were prepared using different technique such as thermal evaporation(PVD) [1], sputtering [5], electron beam evaporation(EBE) [6], chemical bath deposition(CBD) [7], spray pyrolysis(SP) [8], electrodeposition [9], photoelectrochemical [10], SILAR [11] and photochemical deposition [12].…”

Section: Introducctionmentioning

confidence: 99%

Investigation the effect of annealing temperature on the optical properties of CdSe thin films

2018

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Investigation the effect of annealing temperature on the optical properties of CdSe thin films, Duhok, Irak. Innovaciencia. 2018; 6(1): 1-5. http://dx.ABSTRACT Introduction: CdSe is an important II-VI semiconducting material due to its typical optical properties such as small direct band gap (1.7 eV) and a high refractive index and, thus, a major concern is focused on the investigation of optical properties of CdSe thin films which is important to promote the performances of the devices of solid -state such as SC (solar cells), thin film transistors, LED (light-emitting diodes), EBPL (electron-beam pumped lasers) and electroluminescent devices. In the present work, CdSe thin films were deposited by thermal evaporation method and the results have been analysed and presented. Materials and Methods: CdSe thin films has been deposited on glass microscopic slides as substrates of (75×25×1 mm) under room temperature using PVD technique. CdSe blended powders gets evaporated and condensed on the substrate. The film thickness (t = 100 5 nm) which is measured using Michelson interferometry method. Transmission spectrum, from 200-1100 nm, are scanned using two beams UV-VIS Spectrophotometer (6850 UV/Vis. Spectrophotometer-JENWAY). The deposited films then were annealed at temperature range of (1500C to 3500C) under vacuum to have a stable phase of the material and prevent surface oxidization. Results and Discussion: A transmittance spectrum of CdSe thin film is scanned over wavelength range 200 to 1100 nm using a (6850 UV/Vis. Spectrophotometer-JENWAY) at room temperature. The transmittance percentage between the as-deposited film and the annealed films change varies from (17.0%) to (47.0%). It is clearly seen that there is a shift toward higher energy (Blue Shift) in the transmittance spectrum. As annealing temperature increased the transmittance edge is shifted to the longer wavelength (i.e., after annealing the CdSe films shows red shifts in their optical spectra). The band gap was found within the range 1.966-1.7536 eV for CdSe thin film. As annealing temperature increases, the Eg continuously decreases. Conclusions: CdSe thin films have been deposited using Physical Vapor Deposition (PVD) Technique. It is found that the transmission for asdeposited films is (17%) and increases to (47%) as annealing temperature increases. Beside this the energy gap for as-deposited CdSe film is (1.966eV) and decreased from (1.909 eV) to (1.7536eV) as the annealing temperature increases. There is a strong red shift in optical spectrum of the annealed CdSe films. There is a gradual shift of the annealed films thin film spectra as compared of bulk CdSe films.

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“…Currently, the magnetron sputtering [10] and chemical methods, namely chemical bath [11e13], photochemical [14], and electrochemical deposition [15,16] etc., are the most used techniques for growth of CdSe films. In most cases the crystal quality of CdSe thin films deposited by these methods is rather low (small grain size, high concentrations of the extended defects and high level of microstrain) [11,12]. The modifications of the thermal vacuum deposition method such as hot-wall epitaxy and isothermal close-spaced sublimation allow to obtaining CdSe thin films with improved crystal properties [17e23].…”

Section: Introductionmentioning

confidence: 99%

Morphological, structural, compositional properties and IR-spectroscopy of CdSe films deposited by close-spaced vacuum sublimation

Ivashchenko

Opanasyuk

Perekrestov

et al. 2015

Vacuum

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a b s t r a c tThe polycrystalline CdSe films were deposited by the close-spaced vacuum sublimation technique at the different substrate temperatures (373e873 K). Surface morphology, grain size and growth mechanism of the films were determined by the scanning electron microscopy. The X-ray diffraction analysis of structural and sub-structural properties of the films was carried out to study their phase composition and growth texture. The main structural parameters of thin films, such as texture, lattice parameter, grain size, scattering domain size and micro-stress level have been determined in the work depending on the condensation film conditions. RBS and FTIR analysis shows that obtained films in general are homogenous and pure. As a result, the growth conditions of CdSe polycrystalline films with good crystal quality were determined.

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Chemical bath deposition and characterization of CdSe thin films for optoelectronic applications

Cited by 59 publications

References 11 publications

Solvothermal synthesis, deposition and characterization of cadmium selenide (CdSe) thin films by thermal evaporation technique

Solvothermal synthesis, deposition and characterization of cadmium selenide (CdSe) thin films by thermal evaporation technique

Investigation the effect of annealing temperature on the optical properties of CdSe thin films

Morphological, structural, compositional properties and IR-spectroscopy of CdSe films deposited by close-spaced vacuum sublimation

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